Tips
du -sh /var/* | sort -n
#dh -f [disk show]
File Contain remove
# echo > dovecot.conf { dovecote file contain remove}
# cat 2asik > ashik [file contain transfer 1 to another]
# hostnamectl set-hostname mail [Add name file]
# echo "192.168.0.14 mail.worldcm.net mail " >> /etc/hosts
# cat /etc/hosts
Disk repair.
fsck -y [karnel failur]
rpm -e postfix --nodeps [rpm remove without contain]
Netstat
netstat -nat [show ports allow]
netstat -ni [ show interface error]
netstat -r
netstat -i [Show the list of network interface]
netstat -ie [Display extended information on the interfaces]
postconf -m [Postfix configuration utility]
Directory file Size
cd /home/accesst2/mail/
Break Root Password Centos
Step 1--- Reboot The System
After Reboot you will see to lines click on first line and press e
after pressing e you will go to a file
on that file go to line vmlinuz on in that line after F-8
F-8 write rd.break and press ctrl+x
you will be on line
switch_root:/# mount -o remount,rw /sysroot
switch_root:/#chroot /sysroot
root:/#passwd root
new pass
root# touch /.autorelable and exit and reboot
thts it