零碎记录

1. #!/usr/bin/env bash这样最佳
用env的好处是可移植性的提高，比如 #! /usr/bin/env python 不论python解释器装哪都可以正确执行
--- 微博

2.

The utmp file keeps track of the current login state of each user.

The wtmp file records all logins and logouts history.

The btmp file records failed login attempts.

3.

grub error 13, 15, 24

4.

ps aux - RSS，VSZ

5.

rpm2cpio file.rpm | cpio -div

6.

netstat -tnl

fuser -v 21/tcp

7.通过inode修改文件名
find . -inum 17956913 -exec mv {} file.txt \;
find . -inum 17956913 -exec rm {} \;