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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

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