练习
1题.date +%T>>time.txt
date +%H:%M:%S>>time.txt
2题.head -n 18 /etc/passwad | tail -n 3
3题. ls /bin/[[:upper:]]>bin_westos_file.txt | wc -l
4题.find /etc passwd misslies 2>/dev/null
5题.find /etc passwd >/tmp/westos.out
6题.find /etc passwd missile 2>/tmp/westos.err
7题find /etc passwd >/tmp/westos.all 2>&1| cat /tmp/westos.all
8题
mkdir study
touch WESTOS_class{1…2}_linux{1…6} | cp WESTOS_class{1…2}_linux{1…6} student/
9题
mkdir /tmp/VERSION
cd /tmp/VERSION
touch redhat_version{1…8}
10题
mkdir SINGLE
cp /tmp/VERSION redhat_version[1357] SINGLE/
11题
mkdir /DOUBLE
cp /tmp/VERSION redhat_versiom[2468] /DOUBLE/
12题
mv student/WESTOS_class1_linux* /root/Desktop/CLASS1
13题
mv student/WESTOS_class2_linux* /root/Desktop/CLASS2
14题
cp /etc/[[:digit:]].conf confdir/
rm -fr confdir/
