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linux view history commands

angryTom

Oct 22, 2019 pm 01:26 PM

linux

linux view history command

In Linux, the history of bash input will be stored in the .bash_history file. history command is mainly used to display the content of historical command records and issue commands in the historical records.

Usage: First open Terminal; then enter history and hit Enter; the screen will display 1000 historical commands.

Recommended: [Linux video tutorial]

Command syntax:

history [n]
history [-c]
history [-raw] histfiles

Parameters:

n  ：数字,要列出最近的 n 笔命令列表
-c ：将目前的shell中的所有 history 内容全部消除
-a ：将目前新增的history 指令新增入 histfiles 中，若没有加 histfiles,则预设写入 ~/.bash_history
-r ：将 histfiles 的内容读到目前这个 shell 的 history 记忆中
-w ：将目前的 history 记忆内容写入 histfiles。

Common commands:

history N 显示最近的N条命令，例如history 5 
history -d N 删除第N条命令，这个N就是前面的编号，例如history -d 990 
history -c 清空命令历史 
history -a 将当前会话中的命令历史写入指定文件 

echo $HISTFILE 使用此命令查看环境变量
# echo $HISTFILE 
/root/.bash_history

echo $HISTFILESIZE 查看最大保存数目 

export HISTTIMEFORMAT=’%F %T ’ 让history可以有时间戳显示

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