请教2个shell脚本

shoulders

2个面试题，没用过shell写复杂的脚本，请教大家了。
1.Write a small shell script that adds an extension ".new" to all the files in a directory.

2.Looking at history file in unix shell for a user, find 5 most often used commands.

黑色阳光_cu

1
find -maxdepth 1 -type f -not -iname "*.new" -exec mv {} {}.new \;

aluoyeshi

2
cat /home/user/.bash_history |sort |uniq -c |sort -k1 -n -r |head -5

shoulders

回复 2# 黑色阳光_cu


    多谢。

shoulders

回复 3# aluoyeshi


    多谢多谢 这么晚了还不睡觉啊