1、目录管理:less
ls , cd , pwd , mkdir , rmdir , treespa
2、文件管理排序
touch , file , stat , rm , cp , mv , nanoio
3、日期时间awk
date , clock , hwclock , calsed
4、文本处理date
cat , more , less , head , tail , cut , sort , uniq , grepfile
cut , join , sed , awkgrep
5、文本排序统计
sort , uniq
6、文本统计
wc (word count)
7、字符处理命令 tr [option] ... SET1 [SET2] < file