1，[root@centos7 data]# ifconfig ens33 | grep netmask|tr -s " " |cut -d " " -f3
192.168.3.234
2，[root@centos7 data]# df -Th | tr -s " " | cut -d " " -f6|tr -d % | sort -rn | head -n1
17
3，[root@centos7 data]# cat /etc/passwd |cut -d: -f 1,3,7 | sort -t : -rnk 2 | head -1
nfsnobody:65534:/sbin/nologin
4，[root@centos7 /]# ll -d /tmp/
drwxrwxrwt. 33 root root 4096 Oct 25 10:22 /tmp/
777
5，[root@centos7 ~]# netstat -nt | tr -s " " : | cut -d : -f6 | uniq -c |sort -nr
4 192.168.3.1
1 Foreign
1 
1，[root@centos7 home]# cat /proc/meminfo | grep -i ^s
2，[root@centos7 home]# cat /etc/passwd | grep -v "(/bin/bash)$"
3，[root@centos7 home]# cat /etc/passwd | grep "<rpc>" | cut -d: -f7
/sbin/nologin
4，[root@centos7 home]# cat /etc/passwd | grep -o "[0-9]{2,3}"
5，[root@centos7 home]# cat /etc/grub2.cfg | grep "^[[:space:]]+"
6,cat /etc/grub2.cfg | grep "^[[:space:]].*[^[:blank:]]$"
7,cat /etc/passwd | cut -d : -f 1,3|sort -t : -nk 2 | head -42
8,grep "(^.+):.*<1$" /etc/passwd
9,df -Th | grep ^"/dev" | tr -s " " % | cut -d % -f 6 |sort -n