Linux 录制桌面的简单工具
It's actually an application named <em><strong>recordmydesktop</strong></em>, which can be installed by <strong>sudo apt-get install recordmydesktop</strong>.
There are various kinds of purpose to use, but for me, I would like to present or show some mock-up to other people. I made a simple file
<strong>#!/bin/bash
recordmydesktop -windowid $( xwininfo -frame | awk '/Window id:/ {print $4}' )</strong>
After running this script, there is a cross cursor which allows you to select a window. As soon as the window is selected, the recording start. To end the recording, simply type Ctrl+C. After several lines of screen output, there is a .ogv file generated.
You can use Movie Player to view the file if you are using Linux. However, you can still view this file by using VLC, which can be installed to both Mac and Windows.
相关文档：
MySQL :: Linux 下自动备份数据库的 shell 脚本
Linux 服务器上的程序每天都在更新 MySQL 数据库，于是就想起写一个 shell 脚本，结合 crontab，定时备份数据库。其实非常简单，主要就是使用 MySQL 自带的 mysqldump 命令。
脚本内容如下：
#!/bin/sh
# File: /home/mysql/backup.sh
# Database info
DB_NAME=" ......
启动mysql: /etc/rc.d/init.d/mysql start
修改密码: 格式：mysqladmin -u用户名 -p旧密码 password 新密码
使用密码登录: mysql -u root -p
显示数据库: show databases;
选择数据库: use 数据库名;
显示表: show tables;
显示表结构: descibe 表名;
远程登录mysql需要开启� ......
通常要用一些特殊的方法，防止误删除，其实误删除是可以防止的，特意删除是无法防止的。
误删除，通常是chattr +i filename
[root@imdba imdba_t2]# ls -ltr
total 116
-rw-rw—- 1 mysql mysql 61 Oct 17 16:08 db.opt
-rw-rw—- 1 mysql mysql 8556 Oct 17 16:09 imdba_t2_t.frm ......
c[tab][tab]: 获得以c开头的shell命令
alias lm='ls -al' ： 取别名
unalias
type [cmd] : 判断是bash内建还是非内建的cmd
":双引号内的特殊字符可以保有变量特性
':单引号内的特殊字符尽为一般的字符
unset 变量名：取消变量名
$HOME
$PATH
$SHELL
$MAIL
$LANG
$RANDOM
$HSITSIZE
$ENV
env: 列出当前s ......
