bash history
1 history
查看歷史命令
2 export HISTTIMEFORMAT='%F %T '
history
查看帶上時間的歷史命令。
3 cat ~/.bash_history | less
查看歷史命令文件。
4 !n
執行編號爲n的歷史命令
5 history n
顯示最近n條歷史命令。
6 ctrl+R+name
搜索包含name的歷史命令，然後按↑↓鍵可以看到該命令相鄰的命令。
7 !name
執行以name開頭的命令
8 vim ~/.bash_profile
HISTFILE=new history name
修改歷史命令保存的文件，默認在.bash_history中
9 history -c
清除所有的歷史命令。
MySQL history
On Unix, the mysql client writes a record of executed statements to a history file. By default, the history file is named .mysql_history and is created in your home directory. To specify a different file, set the value
of the MYSQL_HISTFILE environment variable.
If you do not want to maintain a history file, first remove .mysql_history if it exists, and then use either of the following techniques:
Set the MYSQL_HISTFILE variable to /dev/null. To cause this setting to take effect each time you log in, put the setting in one of your shell's startup files.
Create .mysql_history as a symbolic link to /dev/null: shell> ln -s /dev/null $HOME/.mysql_history
You need do this only once.
