实用

awk -F "/" '{print $3,$4}' AB2_bkup.log |grep AB2|sort -u
diff file1 file2
export HISTTIMEFORMAT='%F %T'
echo DEVICE /dev/sd[ef]1 >>/etc/mdadm.conf
mdadm Ds >>/etc/mdadm.conf
mdadm --detail --scan >>/etc/mdadm.conf
du -al |wc -l
find ./ -newer 1 |awk -F "/" '{print $2}'|grep '^ '