bash¶
PS1 命令行提示符¶
在~/.bashrc中加入:
export PS1='\n\e[1;37m[\e[m\e[1;32m\u\e[m\e[1;33m@\e[m\e[1;35m\H\e[m \e[4m`pwd`\e[m\e[1;37m]\e[m\e[1;36m\e[m\n\$'
history 在多终端下的表现¶
- There is the history in the history file.
- There is the history in the memory of a bash process.
- The history in the memory of one bash process is not synced with the history in the memory of any other bash process.
- The history in the memory of a bash process is not synced with the history in the file, unless explicitly asked to or during some specific event (see below).
- During startup bash will read the history file. The content of the history file is now in the memory of the bash process.
- During normal use only the history in memory is manipulated.
- During shutdown the history in memory is written to the history file, overwriting any previous content of the history file.
- 可以在 ~/.bashrc 里,加入
shopt -s histappend
, 来防止多terminator 相互覆盖.bash_history, 但是时间戳会乱
history 设置¶
- HISTFILESIZE=2000
- HISTSIZE=2000
- HISTTIMEFORMAT=”%Y%m%d-%H:%M:%S: ” 每个操作,加上时间戳
- export HISTTIMEFORMAT
- shopt -s histappend
终端发送邮件¶
安装sendmail包
配置sendmail /etc/mail.rc:
set from=<from@com> smtp=<stmp.com> set smtp-auth-user=<from@com> smtp-auth-password=<password> smtp-auth=login
启动sendmail服务:
service sendmail start
mail -s ‘this is test’ yourmail@com
tips¶
要在远端最快启动一个静态文件服务器,用以下命令:
python -m SimpleHTTPServer 7777
tcpdump 过滤抓包:
sudo tcpdump -t -XX -i eth0 src host 10.32.30.138 and port 80
在服务器上删除无用的log文件时, 最好使用
echo "" > access.log
代替rm access.log
, 因为该文件可能还在被进程不停的写,这时候删除了inode, 但磁盘空间并没有释放, 还需要用lsof来找问题.