Aug 28
Some useful commands to remember:
Find
Find files older than 2 days:
[root@sirius ~]# find /home/ -mtime +2
Find files created in last 2 days:
[root@sirius ~]# find /home/ -mtime -2
Find and destroy files which doesn’t have gid in /etc/group
[root@sirius ~]# find / -nogroup -exec rm -f {} \;
Cut
Get third character from string:
[root@sirius ~]# grep -i ftp /etc/passwd |cut -c3
Sed
Print lines 10-30:
[root@sirius ~]# sed -n '10,30p;30q' current.txt
print line 15:
[root@sirius ~]# sed -n '15p;15q' current.txt