Ubuntu – USB WiFi

Posted on 2022-03-02 by hoyo

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參考資源

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啟動 USB WiFi

# ip link set wlan0 up

1	# ip link set wlan0 up

掃描 AP

# iw wlan0 scan

1	# iw wlan0 scan

安裝 wpa_supplicant 實現 WPA 認證

# apt install wpasupplicant

1	# apt install wpasupplicant

掃描可連接 SSID

# iw wlan0 scan | grep SSID

1	# iw wlan0 scan \| grep SSID

掃描 SSID 加上訊號強度

How to Grep for Multiple Strings and Patterns

# iw wlan0 scan | grep 'SSID\|signal'
# iw wlan0 scan | grep -E 'SSID|signal'

1 2	# iw wlan0 scan \| grep 'SSID\\|signal' # iw wlan0 scan \| grep -E 'SSID\|signal'

產生連線文件，不加密碼 Enter 後輸入

# wpa_passphrase SSID Password > /tmp/wifi.cnf

1	# wpa_passphrase SSID Password > /tmp/wifi.cnf

連接 AP

# wpa_supplicant -B -i wlan0 -c /tmp/wifi.cnf

1	# wpa_supplicant -B -i wlan0 -c /tmp/wifi.cnf

確認連接狀態

# iw wlan0 link

1	# iw wlan0 link

取得 DHCP IP

# dhclient wlan0

1	# dhclient wlan0

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124 total views

/etc/rc.local 開機不啟動

Posted on 2020-06-08 by hoyo

vi /etc/rc.local

1	vi /etc/rc.local

修改

#!/bin/bash

1	#!/bin/bash

使用 sysv-rc-conf 確定 rc.local server 開啟

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764 total views

在 Linux Mint 18.3 安裝 OSX

Posted on 2018-01-19 by hoyo

如果你有一台還不錯的電腦，又剛好需要測試很多作業系統或是不同的瀏覽器，那使用虛擬機器是不錯的選擇

—

安裝 Vagrant

sudo apt-get install virtualbox
sudo apt-get install vagrant

1 2	sudo apt-get install virtualbox sudo apt-get install vagrant

所以 Vagrant 的底層還是 VirtualBox

—

選擇 OSX 以及安裝啟動

Discover Vagrant Boxes – Vagrant Cloud

建立虛擬主機的存放目錄

mkdir ~/osx
cd ~/osx

1 2	mkdir ~/osx cd ~/osx

準備 Vagrantfile

vi Vagrantfile


Vagrant.configure("2") do |config|
  config.vm.box = "jhcook/osx-yosemite-10.10"
end

vi Vagrantfile

Vagrant.configure("2") do |config|

config.vm.box = "jhcook/osx-yosemite-10.10"

end

啟動、下載

vagrant up

1	vagrant up

—

安裝 Oracle VM VirtualBox Extension Pack

沒出意外應該就會噴紅色錯誤訊息，應該是什麼沒有 USB 2.0 Controlls 之類的，叫你要安裝 VirtualBox Extension Pack

先確定 VirtualBox 版本

$ VBoxManage --version
5.0.40_Ubuntur115130

1 2	$ VBoxManage --version 5.0.40_Ubuntur115130

因為 Linux Mint 18.3 安裝出來的 VirtualBox 都還是 5.0 舊版的，所以要多花兩秒找舊版的載點

$ wget http://download.virtualbox.org/virtualbox/5.0.40/Oracle_VM_VirtualBox_Extension_Pack-5.0.40-115130.vbox-extpack
$ sudo VBoxManage extpack install Oracle_VM_VirtualBox_Extension_Pack-5.0.40-115130.vbox-extpack

1 2	$ wget http://download.virtualbox.org/virtualbox/5.0.40/Oracle_VM_VirtualBox_Extension_Pack-5.0.40-115130.vbox-extpack $ sudo VBoxManage extpack install Oracle_VM_VirtualBox_Extension_Pack-5.0.40-115130.vbox-extpack

安裝的時候有可能會遇到安裝到錯誤的版本，需要了解到底安裝了什麼鬼東西以及如何移除，所以 How to install VirtualBox Extension Pack 需要仔細的看完

—

使用圖形界面 GUI

Install VirtualBox 5.2 on Linux Mint 18 / Linux Mint 17

sudo apt-get install virtualbox-qt
virtualbox

1 2	sudo apt-get install virtualbox-qt virtualbox

如此就可以把 Vagrant 安裝完成的 OSX 呼叫出 GUI 界面，密碼也是 vagrant

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還少了什麼？

使用 Linux 作為虛擬機器的 Host OS ，如果在這之上還可以流暢的使用 OSX 就太好了 (雖然 hoyo 已經有 MacBook 了)

不過虛擬機器的顯示卡缺點還是存在，不過現在有 GPU passthrough 的技術，應該可以解決這個問題，不過就留給下次吧

2 Gaming Rigs, 1 Tower – Virtualized Gaming Build Log

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583 total views

crontab 不重複執行作法

Posted on 2017-04-25 by hoyo

—

當設定了一個背景運作的程式，例如影片轉檔或是網路爬蟲，該設定多久跑一次才是合理？如果設定太短有可能會重複執行引起想像不到的後果，太長也達不到要求。

這種情況就需要 lock file (或其他類似功能) 來協助了。

Linux crontab 不重覆執行, 前一次若尚在執行則跳過

—

CentOS

vi /etc/crontab

*  *  *  *  *  root flock -xn /tmp/php.lock -c '/usr/bin/php /tmp/run.php'

vi /etc/crontab

* * * * * root flock -xn /tmp/php.lock -c '/usr/bin/php /tmp/run.php'

—

FreeBSD

vi /etc/crontab

*  *  *  *  *  root  (lockf -s -t 0 /tmp/php.lock /usr/local/bin/php /tmp/run.php)

vi /etc/crontab

* * * * * root (lockf -s -t 0 /tmp/php.lock /usr/local/bin/php /tmp/run.php)

—

761 total views

CentOS 6.7 安裝、使用 Simple RTMP Server

Posted on 2017-03-27 by hoyo

下載 for CentOS 6 適合套件

simple-rtmp-server (x86_64.zip)

解壓縮及安裝

將 zip 放到 CentOS 後

unzip SRS-CentOS6-x86_64-2.0.205.zip
cd SRS-CentOS6-x86_64-2.0.205
./INSTALL

unzip SRS-CentOS6-x86_64-2.0.205.zip

cd SRS-CentOS6-x86_64-2.0.205

./INSTALL

安裝完成後使用

/etc/init.d/srs restart

1	/etc/init.d/srs restart

啟動 SRS 服務

一般來說應該會看到 LISTEN 1935 的 RTMP Server

[root@localhost:SRS-CentOS6-x86_64-2.0.205] # netstat -luntp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name   
tcp        0      0 0.0.0.0:445                 0.0.0.0:*                   LISTEN      5397/smbd           
tcp        0      0 0.0.0.0:1985                0.0.0.0:*                   LISTEN      19077/./objs/srs    
tcp        0      0 0.0.0.0:3306                0.0.0.0:*                   LISTEN      5256/mysqld         
tcp        0      0 0.0.0.0:139                 0.0.0.0:*                   LISTEN      5397/smbd           
tcp        0      0 0.0.0.0:11211               0.0.0.0:*                   LISTEN      5085/memcached      
tcp        0      0 0.0.0.0:1935                0.0.0.0:*                   LISTEN      19077/./objs/srs    
tcp        0      0 0.0.0.0:111                 0.0.0.0:*                   LISTEN      4545/rpcbind        
tcp        0      0 0.0.0.0:8080                0.0.0.0:*                   LISTEN      19077/./objs/srs    
tcp        0      0 0.0.0.0:56144               0.0.0.0:*                   LISTEN      4645/rpc.statd      
tcp        0      0 127.0.0.1:631               0.0.0.0:*                   LISTEN      4698/cupsd          
tcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN      5308/sendmail

[root@localhost:SRS-CentOS6-x86_64-2.0.205] # netstat -luntp

Active Internet connections (only servers)

Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name

tcp 0 0 0.0.0.0:445 0.0.0.0:* LISTEN 5397/smbd

tcp 0 0 0.0.0.0:1985 0.0.0.0:* LISTEN 19077/./objs/srs

tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 5256/mysqld

tcp 0 0 0.0.0.0:139 0.0.0.0:* LISTEN 5397/smbd

tcp 0 0 0.0.0.0:11211 0.0.0.0:* LISTEN 5085/memcached

tcp 0 0 0.0.0.0:1935 0.0.0.0:* LISTEN 19077/./objs/srs

tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 4545/rpcbind

tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN 19077/./objs/srs

tcp 0 0 0.0.0.0:56144 0.0.0.0:* LISTEN 4645/rpc.statd

tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 4698/cupsd

tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 5308/sendmail

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發送 HLS 訊號流

參考 conf/http.hls.conf 設定，修改 conf/srs.conf

# main config for srs.
# @see full.conf for detail config.

listen              1935;
max_connections     1000;
srs_log_tank        file;
srs_log_file        ./objs/srs.log;
http_api {
    enabled         on;
    listen          1985;
}
http_server {
    enabled         on;
    listen          8080;
    dir             ./objs/nginx/html;
}
stats {
    network         0;
    disk            sda sdb xvda xvdb;
}
vhost __defaultVhost__ {
    hls {
        enabled         on;
        hls_fragment    10;
        hls_window      60;
        hls_path        /WEBSite/ntuas/WWW/live;
        hls_m3u8_file   [app]/live.m3u8;
        hls_ts_file     [app]/[stream]-[seq].ts;
    }
}

# main config for srs.

# @see full.conf for detail config.

listen 1935;

max_connections 1000;

srs_log_tank file;

srs_log_file ./objs/srs.log;

http_api {

enabled on;

listen 1985;

}

http_server {

enabled on;

listen 8080;

dir ./objs/nginx/html;

}

stats {

network 0;

disk sda sdb xvda xvdb;

}

vhost __defaultVhost__ {

hls {

enabled on;

hls_fragment 10;

hls_window 60;

hls_path /WEBSite/ntuas/WWW/live;

hls_m3u8_file [app]/live.m3u8;

hls_ts_file [app]/[stream]-[seq].ts;

}

有關 HLS 的設定及意義

Delivery HLS

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Android APP

RTMP LIVE Stream Player 播放 RTMP 訊號視頻
CameraFi Live 將 Android 裝置的影音直播到 RTMP Server
srs-sea 使用於 Push HTTP FLV to SRS 方式

—

IOS APP

—

自編譯

cd /tmp
git clone https://github.com/wenjiegit/srs
cd srs/trunk
./configure

cd /tmp

git clone https://github.com/wenjiegit/srs

cd srs/trunk

./configure

預設編譯功能、選項

configure summary:
      --x86-x64 
      --prefix=/usr/local/srs --with-hls --with-hds --with-dvr --without-nginx --with-ssl --without-ffmpeg --with-transcode --with-ingest --with-stat --with-http-callback --with-http-server --without-stream-caster --with-http-api --with-librtmp --without-research --with-utest --without-gperf --without-gmc --without-gmp --without-gcp --without-gprof --without-arm-ubuntu12 --without-mips-ubuntu12 --log-trace

configure summary:

--x86-x64

--prefix=/usr/local/srs --with-hls --with-hds --with-dvr --without-nginx --with-ssl --without-ffmpeg --with-transcode --with-ingest --with-stat --with-http-callback --with-http-server --without-stream-caster --with-http-api --with-librtmp --without-research --with-utest --without-gperf --without-gmc --without-gmp --without-gcp --without-gprof --without-arm-ubuntu12 --without-mips-ubuntu12 --log-trace

在此另外增加幾個功能

–with-stream-caster

—

了解 Server 運作情況

v2_CN_HTTPApi

地址是：http://192.168.1.170:1985/api/v1，主要包含的子api有：

API	Example	Description
server	4481	服务器标识
versions	/api/v1/versions	获取服务器版本信息
summaries	/api/v1/summaries	获取服务器的摘要信息
rusages	/api/v1/rusages	获取服务器资源使用信息
self_proc_stats	/api/v1/self_proc_stats	获取服务器进程信息
system_proc_stats	/api/v1/system_proc_stats	获取服务器所有进程情况
meminfos	/api/v1/meminfos	获取服务器内存使用情况
authors	/api/v1/authors	获取作者、版权和License信息
features	/api/v1/features	获取系统支持的功能列表
requests	/api/v1/requests	获取请求的信息，即当前发起的请求的详细信息
vhosts	/api/v1/vhosts	获取服务器上的vhosts信息
streams	/api/v1/streams	获取服务器的streams信息
clients	/api/v1/clients	获取服务器的clients信息，默认获取前10个

—

HTTP API callback

預設內建 HTTP Callback API Server

cd /tmp/srs/trunk/research/api-server
python server.py 8085

1 2	cd /tmp/srs/trunk/research/api-server python server.py 8085

官方 REST api 調適工具

HTTP methods

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1,299 total views, 1 views today

CentOS 7 minimal 安裝 Server – PHP7 + Apache 2.4 + MySQL 5.6

Posted on 2017-03-19 by hoyo

取得 CentOS 7

Download CentOS

選 Minimal ISO 下載即可，下載後是燒光碟還是 USB 就要看安裝主機的支援程度。

—

安裝及基礎設定

How to Install a CentOS 7.3 Minimal Server

網路

查看 IP ，minimal 沒有 ifconfig 只有 ip

ip a

ip a

修改設定啟用網路卡

vi /etc/sysconfig/network-scripts/ifcfg-enp3s0

ONBOOT=yes

vi /etc/sysconfig/network-scripts/ifcfg-enp3s0

ONBOOT=yes

重新啟動網路服務

systemctl restart network

1	systemctl restart network

安裝 ifconfig, netstat

yum install net-tools

1	yum install net-tools

—

安裝 ssh

yum install openssh

1	yum install openssh

systemctl restart sshd.service
systemctl enable sshd.service

1 2	systemctl restart sshd.service systemctl enable sshd.service

—

設定主機名稱 hostname

最小化安裝不會主動設置 hostname ，不設置很多服務是跑不起來的

vi /etc/hosts

192.168.0.3  myserver

vi /etc/hosts

192.168.0.3 myserver

或是使用 hostnamectl 指令

hostnamectl set-hostname MyHostName

1	hostnamectl set-hostname MyHostName

—

安裝 PHP 7 + Apache 2.4 + MySQL 5.6

How to Install PHP 7.0, Apache 2.4, & MySQL 5.6 on CentOS / RHEL 7.1 & 6.7

安裝 epel

yum install epel-release
rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-7.rpm

1 2	yum install epel-release rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-7.rpm

安裝 PHP 就會一併安裝 Apache 2.4

yum install php70w
yum install php70w-mysql php70w-xml php70w-soap php70w-xmlrpc
yum install php70w-mbstring php70w-json php70w-gd php70w-mcrypt

yum install php70w

yum install php70w-mysql php70w-xml php70w-soap php70w-xmlrpc

yum install php70w-mbstring php70w-json php70w-gd php70w-mcrypt

設定 PHP

vi /etc/php.ini

upload_max_filesize = 2000M

vi /etc/php.ini

upload_max_filesize = 2000M

設定 Apache 2.4 HTTP Server

systemctl start httpd.service
systemctl enable httpd.service
firewall-cmd --permanent --zone=public --add-service=http
firewall-cmd --permanent --zone=public --add-service=https
firewall-cmd --reload

systemctl start httpd.service

systemctl enable httpd.service

firewall-cmd --permanent --zone=public --add-service=http

firewall-cmd --permanent --zone=public --add-service=https

firewall-cmd --reload

安裝 MySQL Server

hoyo 不推薦使用 MariaDB ，雖然 MariaDB 是 MySQL 的分支，可是「並不是完全相容」，現階段 (2017-03) hoyo 還不會使用 MariaDB 當作主資料庫

# rpm -Uvh http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
# yum install -y mysql-server
# systemctl start mysqld.service
# systemctl enable mysqld.service

# rpm -Uvh http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm

# yum install -y mysql-server

# systemctl start mysqld.service

# systemctl enable mysqld.service

變更 root 密碼及移除預設資料

mysql_secure_installation

1	mysql_secure_installation

—

MySQL

修改 root 密碼

UPDATE mysql.user SET Password=PASSWORD('MyNewPass') WHERE User='root';
FLUSH PRIVILEGES;

1 2	UPDATE mysql.user SET Password=PASSWORD('MyNewPass') WHERE User='root'; FLUSH PRIVILEGES;

修改 /etc/mycnf 設定

vi /etc/my.cnf

[mysqld]
bind-address = 0.0.0.0
sql_mode=

vi /etc/my.cnf

[mysqld]

bind-address = 0.0.0.0

sql_mode=

bind-address 常駐 IP，預設常駐 any 可能運作在 IPv6，如果需要運作在 IPv4 就需要手動修改
sql_mode 如果需要移植舊程式

重新啟動 MySQL Server

systemctl restart mysql

1	systemctl restart mysql

修改防火橋

firewall-cmd --permanent --zone=public --add-service=mysql
firewall-cmd --reload

1 2	firewall-cmd --permanent --zone=public --add-service=mysql firewall-cmd --reload

—

安裝 phpMyAdmin

4.4 版本使用這個

yum install phpmyadmin

1	yum install phpmyadmin

新版 4.7 以上使用這個

yum remove php-mysql
yum install php-mysqlnd
yum --enablerepo=remi install phpMyAdmin

yum remove php-mysql

yum install php-mysqlnd

yum --enablerepo=remi install phpMyAdmin

將允許進入 IP 加入設定檔，編輯

vi /etc/httpd/conf.d/phpMyAdmin.conf

Require ip 192.168.0.0/24

vi /etc/httpd/conf.d/phpMyAdmin.conf

Require ip 192.168.0.0/24

重新啟動 Apache

systemctl restart httpd.service

1	systemctl restart httpd.service

如果需要修改 phpMyAdmin ，設定檔在 /etc/phpMyAdmin/config.inc.php

例如：需要延長閒置時間以及不檢查版本

vi /etc/phpMyAdmin/config.inc.php

$cfg['VersionCheck'] = false; // 不檢查新版本
$cfg['LoginCookieValidity'] = 86400; // 將閒置時間設定為 86400 秒 (1440)
$cfg['MaxNavigationItems'] = 100; // 導覽樹分支數量設定 100 (50)

vi /etc/phpMyAdmin/config.inc.php

$cfg['VersionCheck'] = false; // 不檢查新版本

$cfg['LoginCookieValidity'] = 86400; // 將閒置時間設定為 86400 秒 (1440)

$cfg['MaxNavigationItems'] = 100; // 導覽樹分支數量設定 100 (50)

—

安裝 DNS Server – Bind

yum install bind

1	yum install bind

修改設定檔

vi /etc/named.conf

options {
    listen-on port 53 { 127.0.0.1; 192.168.0.3; };
    allow-query { any; }; // 自己管理 DNS Server 所以必須開放查詢
    recursion no;
};

zone "hoyo.idv.tw" in {
    type master;
    file "/etc/named/hoyo.idv.tw.db";
};

vi /etc/named.conf

options {

listen-on port 53 { 127.0.0.1; 192.168.0.3; };

allow-query { any; }; // 自己管理 DNS Server 所以必須開放查詢

recursion no;

};

zone "hoyo.idv.tw" in {

type master;

file "/etc/named/hoyo.idv.tw.db";

};

重新啟動 named service 以及設定開機啟動

systemctl enable named
systemctl start named.service

1 2	systemctl enable named systemctl start named.service

開放防火牆

firewall-cmd --permanent --zone=public --add-service=dns
firewall-cmd --reload

1 2	firewall-cmd --permanent --zone=public --add-service=dns firewall-cmd --reload

—

關閉 SELinux

# vi /etc/selinux/config


SELINUX=disabled
#SELINUXTYPE=targeted

# vi /etc/selinux/config

SELINUX=disabled

#SELINUXTYPE=targeted

重新開機

centos 7.3 错误设置selinux 导致不能启动 Failed to load SELinux policy. Freezing

—

關閉防火牆

# systemctl stop firewalld
# systemctl disable firewalld

1 2	# systemctl stop firewalld # systemctl disable firewalld

—

安裝 Samba

yum install samba
systemctl enable smb
systemctl restart smb
firewall-cmd --permanent --zone=public --add-service=samba
firewall-cmd --reload

yum install samba

systemctl enable smb

systemctl restart smb

firewall-cmd --permanent --zone=public --add-service=samba

firewall-cmd --reload

useradd user
smbpasswd -a user

1 2	useradd user smbpasswd -a user

vi /etc/samba/smb.conf

[global]
    workgroup = SAMBA
    security = user
    hosts allow = 192.168.0.

    passdb backend = tdbsam

    # Charset settings
    display charset = utf8
    unix charset = utf8
    dos charset = cp950

[homes]
    comment = Home Directories
    valid users = %S, %D%w%S
    browseable = No
    read only = No
    inherit acls = Yes

[root]
    comment = Home Directories
    browseable = yes
    writable = yes
    path = /

vi /etc/samba/smb.conf

[global]

workgroup = SAMBA

security = user

hosts allow = 192.168.0.

passdb backend = tdbsam

# Charset settings

display charset = utf8

unix charset = utf8

dos charset = cp950

[homes]

comment = Home Directories

valid users = %S, %D%w%S

browseable = No

read only = No

inherit acls = Yes

[root]

comment = Home Directories

browseable = yes

writable = yes

path = /

—

從舊的主機複製資料

因為都有安裝 samba ，所以思路就是將複製的資料掛載到目的主機，然後進行複製

yum install cifs-utils
mount.cifs //192.168.0.3/root /mnt/web -o user=user

1 2	yum install cifs-utils mount.cifs //192.168.0.3/root /mnt/web -o user=user

—

每日備份

HOYO 的 hoyo.idv.tw 主機

backup.sh

#!/bin/bash
filename=`date "+%w"`
mysqldump --user=root -p'password' --all-databases > /tmp/db$filename.sql
tar czf /tmp/web$filename.tgz /WEBSite/*
 
ftp -n 192.168.0.99<< co
user backup backup
cd backup
lcd /tmp
put web$filename.tgz
put db$filename.sql
by
co

#!/bin/bash

filename=`date "+%w"`

mysqldump --user=root -p'password' --all-databases > /tmp/db$filename.sql

tar czf /tmp/web$filename.tgz /WEBSite/*

ftp -n 192.168.0.99<< co

user backup backup

cd backup

lcd /tmp

put web$filename.tgz

put db$filename.sql

就如文章內所說，可以從 FreeBSD 用到 Linux ，只要修改第一行 shell 以及指令相關路徑即可運作，不過 minimal CentOS 7 沒有 ftp command ，所以運作前需要補一個

yum install -y ftp

1	yum install -y ftp

—

安裝 FFmpeg

rpm -ivh https://www.mirrorservice.org/sites/dl.atrpms.net/el7-x86_64/atrpms/stable/atrpms-repo-7-7.el7.x86_64.rpm
yum install ffmpeg

1 2	rpm -ivh https://www.mirrorservice.org/sites/dl.atrpms.net/el7-x86_64/atrpms/stable/atrpms-repo-7-7.el7.x86_64.rpm yum install ffmpeg

—

安裝新硬碟

先使用 fdisk 分割硬碟

fdisk /dev/sdb

1	fdisk /dev/sdb

然後使用 mkfs.xfs 指令格式化硬碟

mkfs.xfs -f /dev/sdb1

1	mkfs.xfs -f /dev/sdb1

建立掛載的目錄

mkdir /WEBSite

1	mkdir /WEBSite

將新硬碟掛載到目錄上

mount -t xfs /dev/sdb1 /WEBSite

1	mount -t xfs /dev/sdb1 /WEBSite

使用 df 指令驗證正確性

df -TH /WEBSite

檔案系統       類型  容量   已用   可用    已用%   掛載點
/dev/sdb1     xfs   2.0T   34M   2.0T    1%     /WEBSite

df -TH /WEBSite

檔案系統類型容量已用可用已用% 掛載點

/dev/sdb1 xfs 2.0T 34M 2.0T 1% /WEBSite

—

上、下鍵搜尋指令

vi ~/.inputrc

# Press up-arrow for previous matching command
"\e[A":history-search-backward
# Press down-arrow for next matching command
"\e[B":history-search-forward

vi ~/.inputrc

# Press up-arrow for previous matching command

"\e[A":history-search-backward

# Press down-arrow for next matching command

"\e[B":history-search-forward

—

相簿處理相關套件

exiv2

yum install exiv2

1	yum install exiv2

ImageMagick

yum install ImageMagick

1	yum install ImageMagick

dcraw

yum install dcraw

1	yum install dcraw

—

資料還原

mysql -u root -p'資料庫密碼' --force  < AllDatabase.sql

1	mysql -u root -p'資料庫密碼' --force < AllDatabase.sql

—

安裝 Killall

centos7精简安装后使用发现没有killall命令

yum install psmisc

1	yum install psmisc

—

安裝 whois

# yum install jwhois


# whois hoyo.idv.tw
[查詢 whois.twnic.net.tw]
[whois.twnic.net.tw]
Domain Name: hoyo.idv.tw

   Contact:
      hoyo
      pc@hoyo.idv.tw


   Record expires on 2021-06-07 (YYYY-MM-DD)
   Record created on 2000-12-01 (YYYY-MM-DD)


Registration Service Provider: TWNIC

# yum install jwhois

# whois hoyo.idv.tw

[查詢 whois.twnic.net.tw]

[whois.twnic.net.tw]

Domain Name: hoyo.idv.tw

Contact:

hoyo

pc@hoyo.idv.tw

Record expires on 2021-06-07 (YYYY-MM-DD)

Record created on 2000-12-01 (YYYY-MM-DD)

Registration Service Provider: TWNIC

—

1,685 total views, 1 views today

CentOS 7 安裝、升級 PHP 5.6

Posted on 2016-11-14 by hoyo

使用自訂 repo 的方式無法順利安裝 php-gd 等待測試更新

—

參考

How to install PHP 5.6 on CentOS 7.0 x64
Upgrade PHP from 5.4 to 5.6 on CentOS 7
rpms.famillecollet.com/enterprise/7/php56/x86_64/
rpms.famillecollet.com/enterprise/7/remi/x86_64/
CentOS6／CentOS7にPHP5.6／PHP7をyumでインストール

—

安裝、更新 EPEL

rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm

1 2	rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm

—

編輯 yum 容器

vi /etc/yum.repos.d/repo.repo

[remi-php56]
name=Les RPM de remi de PHP 5.6 pour Enterprise Linux 7 - $basearch
mirrorlist=http://rpms.famillecollet.com/enterprise/7/php56/x86_64
# WARNING: If you enable this repository, you must also enable "remi"
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-remi

[remi-php56]

name=Les RPM de remi de PHP 5.6 pour Enterprise Linux 7 - $basearch

mirrorlist=http://rpms.famillecollet.com/enterprise/7/php56/x86_64

# WARNING: If you enable this repository, you must also enable "remi"

enabled=1

gpgcheck=0

gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-remi

雖然網路上所有的資料都有設定 gpgkey 但是都沒有說明產生的方法，所以如果有正常使用必須將 gpgcheck 設定為 0

—

更新 libzip

wget http://rpms.famillecollet.com/enterprise/7/remi/x86_64/libzip-last-1.1.3-1.el7.remi.x86_64.rpm
yum localinstall libzip-last-*.rpm
yum update

wget http://rpms.famillecollet.com/enterprise/7/remi/x86_64/libzip-last-1.1.3-1.el7.remi.x86_64.rpm

yum localinstall libzip-last-*.rpm

yum update

—

安裝、更新 PHP

# yum remove php-*
# yum install --enablerepo=remi,remi-php56 php php-devel php-mbstring php-pdo php-gd php-xml php-mcrypt php-mysql

1 2	# yum remove php-* # yum install --enablerepo=remi,remi-php56 php php-devel php-mbstring php-pdo php-gd php-xml php-mcrypt php-mysql

—

1,553 total views

CentOS 使用 yum 安裝 FFmpeg

Posted on 2016-05-12 by hoyo

CentOS 7 安裝 FFmpeg 4.0.1

2018-07-11 更新 – 4.x

# yum install yum-utils
# yum-config-manager --add-repo https://negativo17.org/repos/epel-multimedia.repo
# yum install ffmpeg

# yum install yum-utils

# yum-config-manager --add-repo https://negativo17.org/repos/epel-multimedia.repo

# yum install ffmpeg

可能發生的錯誤

套件衝突 file /usr/lib64/libva.so.1 from install of libva-1.8.3-1.el7.x86_64 conflicts with file from package libva1-1.3.1-11.el7.x86_64

—

2018-06-12 已經更新目前有效方式 – 2.6.8

—

安裝

# rpm -Uvh http://li.nux.ro/download/nux/dextop/el7/x86_64/nux-dextop-release-0-5.el7.nux.noarch.rpm
# yum -y install ffmpeg

1 2	# rpm -Uvh http://li.nux.ro/download/nux/dextop/el7/x86_64/nux-dextop-release-0-5.el7.nux.noarch.rpm # yum -y install ffmpeg

—

CentOS 6 安裝 FFmpeg 2.6.8

How to Install FFmpeg on CentOS

# rpm -Uvh http://li.nux.ro/download/nux/dextop/el6/x86_64/nux-dextop-release-0-2.el6.nux.noarch.rpm
# yum install ffmpeg ffmpeg-devel -y

1 2	# rpm -Uvh http://li.nux.ro/download/nux/dextop/el6/x86_64/nux-dextop-release-0-2.el6.nux.noarch.rpm # yum install ffmpeg ffmpeg-devel -y

—

3,220 total views

BigBlueButton 0.8 安裝、設定、使用備忘

Posted on 2016-05-04 by hoyo

Home – BigBluebutton

下載

BigBlueButton (bigbluebutton081-VM.zip)

安裝

0.81 在進入作業系統後會自動下載、安裝所需軟體，之前的版本可參考以下步驟

開啟 VMware 之前必須確保開啟後網路可對外連線。
預設登入帳號 firstuser 密碼 default
apt-get update
apt-get dist-upgrade
apt-get install bigbluebutton
apt-get install bbb-demo
bbb-conf –setip <電腦 IP 位址>

系統操作

查看安裝套件列表
# dpkg -l
列出單一套件檔案清單
# dpkg -L bbb-web

使用

一般使用：在安裝 bbb-demo 後，

疑難雜症

將開啟運作正常的 BBB VM 換電腦開啟，網路卡 eth0 消失無法運作，請參考： InstallingBigBlueButton – bigbluebutton – How to install BigBlueButton like a real developer. :-) – Open Source Web Conferencing – Google Project Hosting 將 /etc/udev/rules.d/70-persistent-net.rules 網路設定檔案重新設定

$ sudo -i
# ifconfig -a
# vi /etc/udev/rules.d/70-persistent-net.rules

   eth1 -> eth0

# init 6

$ sudo -i

# ifconfig -a

# vi /etc/udev/rules.d/70-persistent-net.rules

eth1 -> eth0

# init 6

—

537 total views

在 CentOS 6.7 上安裝 Tesseract OCR

Posted on 2015-09-23 by hoyo

安裝

參考至： Centos5.5 安装Tesseract-OCR (本機備份)

CentOS 5.5 和 6.7 實在有些差距，不過還好要安裝的軟體變化不大，最後安裝的選擇是

確實按照安裝步驟將相依性程式先安裝後編譯即可順利安裝

yum install libjpeg-devel libpng-devel libtiff-devel zlib-devel

1	yum install libjpeg-devel libpng-devel libtiff-devel zlib-devel

特別寫出來是因為，我以為我的環境安裝一堆軟體應該不缺這種基礎元件，結果還是少了 …. = =a

使用

就敲指令就對了

Usage:tesseract imagename outputbase [-l lang] [-psm pagesegmode] [configfile...]

pagesegmode values are:
0 = Orientation and script detection (OSD) only.
1 = Automatic page segmentation with OSD.
2 = Automatic page segmentation, but no OSD, or OCR
3 = Fully automatic page segmentation, but no OSD. (Default)
4 = Assume a single column of text of variable sizes.
5 = Assume a single uniform block of vertically aligned text.
6 = Assume a single uniform block of text.
7 = Treat the image as a single text line.
8 = Treat the image as a single word.
9 = Treat the image as a single word in a circle.
10 = Treat the image as a single character.
-l lang and/or -psm pagesegmode must occur before anyconfigfile.

Single options:
  -v --version: version info
  --list-langs: list available languages for tesseract engine

Usage:tesseract imagename outputbase [-l lang] [-psm pagesegmode] [configfile...]

pagesegmode values are:

0 = Orientation and script detection (OSD) only.

1 = Automatic page segmentation with OSD.

2 = Automatic page segmentation, but no OSD, or OCR

3 = Fully automatic page segmentation, but no OSD. (Default)

4 = Assume a single column of text of variable sizes.

5 = Assume a single uniform block of vertically aligned text.

6 = Assume a single uniform block of text.

7 = Treat the image as a single text line.

8 = Treat the image as a single word.

9 = Treat the image as a single word in a circle.

10 = Treat the image as a single character.

-l lang and/or -psm pagesegmode must occur before anyconfigfile.

Single options:

-v --version: version info

--list-langs: list available languages for tesseract engine

—

tesseract 辨識圖檔產生文字檔案名稱 -l 使用辨識字體

tesseract /tmp/phototest.tif /tmp/output -l eng

1	tesseract /tmp/phototest.tif /tmp/output -l eng

輸出的檔案會自動加上 .txt 副檔名

phototest.tif 是內附的測試圖檔，可以到這裡看

因為有安裝正體中文字體辨識檔案，當然也可以換成這樣辨識

tesseract phototest.tif output -l chi_tra

1	tesseract phototest.tif output -l chi_tra

不過辨識正確率就相當差了，結果如

ThiS iS a |0t of T2 point teXt to teSt the
oc「 c0de and see if it WorkS 0n a|| typeS
of fi|e f0「mat'

ˉ|ˉhe quick br0Wn do9 jumped oVe「 the
|aZy fo)(_ The quick broWn do9 jumped
oVer the |aZy f0X_ ˉ|ˉhe quick br0Wn do9
jumped 0Ver the |aZy f0X_ ˉ「he quick
br0Wn do9 jumped oVe「 the |aZy fo)(_

ThiS iS a |0t of T2 point teXt to teSt the

oc「 c0de and see if it WorkS 0n a|| typeS

of fi|e f0「mat'

ˉ|ˉhe quick br0Wn do9 jumped oVe「 the

|aZy fo)(_ The quick broWn do9 jumped

oVer the |aZy f0X_ ˉ|ˉhe quick br0Wn do9

jumped 0Ver the |aZy f0X_ ˉ「he quick

br0Wn do9 jumped oVe「 the |aZy fo)(_

看不懂的人請看 eng 辨識結果，如

This is a lot of 12 point text to test the
ocr code and see if it works on all types
of file format.

The quick brown dog jumped over the
lazy fox. The quick brown dog jumped
over the lazy fox. The quick brown dog
jumped over the lazy fox. The quick
brown dog jumped over the lazy fox.

This is a lot of 12 point text to test the

ocr code and see if it works on all types

of file format.

The quick brown dog jumped over the

lazy fox. The quick brown dog jumped

over the lazy fox. The quick brown dog

jumped over the lazy fox. The quick

brown dog jumped over the lazy fox.

有關辨識率提昇

—

免安裝

安裝後的檔案即可複製出來使用，使用上會遇到的問題就是 tessdata 路徑指定

>tesseract.exe 3.jpg 3 --tessdata-dir .\tessdata -l chi_tra

1	>tesseract.exe 3.jpg 3 --tessdata-dir .\tessdata -l chi_tra

—

測試結果

不同的版本語言辨識檔案無法共用
不同的辨識檔辨識率不同
以上的問題可以藉由免安裝的方式解決
4.0 程式可以套用 3.05 辨識檔案

—

Windows 以及訓練

https://digi.bib.uni-mannheim.de/tesseract/

—

668 total views