RHEL 6.3 ,CentOS 6.3,Scientific Linux 6.3 Archives and compressed files

Command	Description
# bunzip2 file1.bz2	decompress a file called 'file1.bz2'
# bzip2 file1	compress a file called 'file1'
# gunzip file1.gz	decompress a file called 'file1.gz'
# gzip file1	compress a file called 'file1'
[root@server1 ~]#  tar –cvf archive_name source [root@server1 ~]# cd /etc/ [root@server1 etc] # tar -cvf /bakup/resolv.tar resolv.conf [root@server1 etc]# cd /bakup/ [root@server1 bakup]# ls -l total 12 -rw-r--r-- 1 root root 10240 Dec 18 18:30 resolv.tar	Create tar extension file
[root@server1 bakup] # tar -xvf /bakup/resolv.tar [root@server1 bakup]# ls resolv.conf  resolv.tar	Extract from tar file
[root@server1 bakup] # gzip -v /bakup/resolv.tar /bakup/resolv.tar:          98.6% -- replaced with /bakup/resolv.tar.gz [root@server1 bakup]# ls resolv.conf  resolv.tar.gz	For Compress
[root@server1 bakup] # gunzip -v /bakup/resolv.tar /bakup/resolv.tar.gz:      98.6% -- replaced with /bakup/resolv.tar [root@server1 bakup]# ls resolv.conf  resolv.tar	UnCompress
[root@server1 ~]# ps	Show current Process
[root@server1 ~]# pstree	Show current process with tree
[root@server1 ~]# uptime	How many times are system start
[root@server1 ~]# top	System process monitor
[root@server1 ~]# pstree | less	Show process with tree
[root@server1 ~]# iostat	Show system process & Idle time
[root@server1 ~]# hostname server1.example.com	Check Host name
[root@server1 ~]# ntsysv	Show runlevel list
[root@server1 ~]# setup	For network configuration,authentication
[root@server1 ~]#chkconfig vsftpd on	Automaticaly on vsftpd on system reboot