Install Howto

Download the latest epel-release rpm from

(a) http://dl.fedoraproject.org/pub/epel/6/SRPMS/epel-release-6-8.src.rpm

(b) http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm

Install epel-release rpm:
```
# rpm -Uvh epel-release*rpm
```

Install epel-release rpm package:

# yum install epel-release

#yum list all;

#yum update all;

#yum install wine* -y;

 Read More:

###################### GET Magic ########################

How to install wine on RHEL 6.3 & Centos 6.3

Install Howto

Download the latest epel-release rpm from

(a) http://dl.fedoraproject.org/pub/epel/6/SRPMS/epel-release-6-8.src.rpm

(b) http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm

Install epel-release rpm:
```
# rpm -Uvh epel-release*rpm
```

Install epel-release rpm package:

# yum install epel-release

#yum list all;

#yum update all;

#yum install wine* -y;

 Read More:

###################### GET Magic ########################

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

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

RHEL 6.3,Centos 6.3 ,Scientific Linux 6.3 Shutdown, Restart and Logout of a system Command

Command	Description
# init 0	shutdown system
# logout	leaving session
# reboot	reboot
# shutdown -h now	shutdown system
# shutdown -h 16:30 &	planned shutdown of the system
# shutdown -c	cancel a planned shutdown of the system
# shutdown -r now	reboot
# telinit 0	shutdown system
# halt	For shutdown system

RHEL 6.3,Centos 6.3 ,Scientific Linux 6.3 Shutdown, Restart and Logout of a system Command

Command	Description
# init 0	shutdown system
# logout	leaving session
# reboot	reboot
# shutdown -h now	shutdown system
# shutdown -h 16:30 &	planned shutdown of the system
# shutdown -c	cancel a planned shutdown of the system
# shutdown -r now	reboot
# telinit 0	shutdown system
# halt	For shutdown system

RHEL 6.3 ,CentOS 6.3 ,Scientific Linux 6.3 Advanced Linux Command

Advanced Command

Command	Description
[root@server1 /]# ls [root@server1 ~]# ls anaconda-ks.cfg Documents file1 install.log.syslog Pictures TemplatesDesktop Downloads install.log Music Public Videos	Show list of directory
[root@server1 ~]# ls –a [root@server1 ~]# su user1 [user1@server1 root]$ cd [user1@server1 ~]$ ls -a . .. .bash_history .bash_logout .bash_profile .bashrc .gnome2 .mozilla .viminfo	Show hidden content of a directory
[user1@server1 ~]$ su root Password: [root@server1 user1]# cd [root@server1 ~]# ls -l total 104 -rw-------. 1 root root 2467 Dec 15 20:25 anaconda-ks.cfg drwxr-xr-x. 2 root root 4096 Dec 18 02:04 Desktop drwxr-xr-x. 2 root root 4096 Dec 16 00:34 Documents drwxr-xr-x. 2 root root 4096 Dec 16 00:34 Downloads	Show Content list with Permission
[root@server1 ~]# ls -lh total 104K -rw-------. 1 root root 2.5K Dec 15 20:25 anaconda-ks.cfg drwxr-xr-x. 2 root root 4.0K Dec 18 02:04 Desktop drwxr-xr-x. 2 root root 4.0K Dec 16 00:34 Documents drwxr-xr-x. 2 root root 4.0K Dec 16 00:34 Downloads	Show content total & Individual Content size.
[root@server1 ~]# ls -lt total 148 -rw-r--r-- 1 root root 46974 Dec 18 04:02 install.log	List by Modification
[root@server1 ~]# ls install.log Music Public Videos anaconda-ks.cfg Documents file1 install.log.syslog Pictures Templates [root@server1 ~]# more install.log	Show content with list Then press Enter
[root@server1 ~]# clear	Clear Screen
[root@server1 ~]# tree	Content show with tree diagram
[root@server1 ~]# rmdir [root@server1 ~]# mkdir 1 [root@server1 ~]# rmdir 1	Remove Emtpy directory
[root@server1 ~]# hwclock Tue 18 Dec 2012 04:20:34 AM BDT -0.924766 seconds	Show DATE & TIME
[root@server1 ~]# history 10	Show content history
[root@server1 ~]# mail	mail from /var/spool/mail
[root@server1 ~]# locate resolv.conf /etc/resolv.conf /etc/sysconfig/networking/profiles/default/resolv.conf /usr/share/man/man5/resolv.conf.5.gz	Search file or service from full system Last update #updatedb

RHEL 6.3 ,CentOS 6.3 ,Scientific Linux 6.3 Advanced Linux Command

Advanced Command

Command	Description
[root@server1 /]# ls [root@server1 ~]# ls anaconda-ks.cfg Documents file1 install.log.syslog Pictures TemplatesDesktop Downloads install.log Music Public Videos	Show list of directory
[root@server1 ~]# ls –a [root@server1 ~]# su user1 [user1@server1 root]$ cd [user1@server1 ~]$ ls -a . .. .bash_history .bash_logout .bash_profile .bashrc .gnome2 .mozilla .viminfo	Show hidden content of a directory
[user1@server1 ~]$ su root Password: [root@server1 user1]# cd [root@server1 ~]# ls -l total 104 -rw-------. 1 root root 2467 Dec 15 20:25 anaconda-ks.cfg drwxr-xr-x. 2 root root 4096 Dec 18 02:04 Desktop drwxr-xr-x. 2 root root 4096 Dec 16 00:34 Documents drwxr-xr-x. 2 root root 4096 Dec 16 00:34 Downloads	Show Content list with Permission
[root@server1 ~]# ls -lh total 104K -rw-------. 1 root root 2.5K Dec 15 20:25 anaconda-ks.cfg drwxr-xr-x. 2 root root 4.0K Dec 18 02:04 Desktop drwxr-xr-x. 2 root root 4.0K Dec 16 00:34 Documents drwxr-xr-x. 2 root root 4.0K Dec 16 00:34 Downloads	Show content total & Individual Content size.
[root@server1 ~]# ls -lt total 148 -rw-r--r-- 1 root root 46974 Dec 18 04:02 install.log	List by Modification
[root@server1 ~]# ls install.log Music Public Videos anaconda-ks.cfg Documents file1 install.log.syslog Pictures Templates [root@server1 ~]# more install.log	Show content with list Then press Enter
[root@server1 ~]# clear	Clear Screen
[root@server1 ~]# tree	Content show with tree diagram
[root@server1 ~]# rmdir [root@server1 ~]# mkdir 1 [root@server1 ~]# rmdir 1	Remove Emtpy directory
[root@server1 ~]# hwclock Tue 18 Dec 2012 04:20:34 AM BDT -0.924766 seconds	Show DATE & TIME
[root@server1 ~]# history 10	Show content history
[root@server1 ~]# mail	mail from /var/spool/mail
[root@server1 ~]# locate resolv.conf /etc/resolv.conf /etc/sysconfig/networking/profiles/default/resolv.conf /usr/share/man/man5/resolv.conf.5.gz	Search file or service from full system Last update #updatedb

Postfix,SMTP Email Server on CentOS 6.3 OR Scientific Linux 6.3,RHEl 6.3

Final Postfix dovcot Server configure & test

[root@server1 ~]# service postfix status;service postfix restart;chkconfig postfix on;
master is stopped
Shutting down postfix:                                     [FAILED]
Starting postfix:                                          [ OK ]
[root@server1 Desktop]# service postfix status;service postfix restart;chkconfig postfix on;
master (pid 3261) is running...
Shutting down postfix:                                     [ OK ]
Starting postfix:                                          [ OK ]
service postfix status;service postfix restart;chkconfig postfix on;
master is stopped
Shutting down postfix:                                     [FAILED]
Starting postfix:                                          [ OK ]
[root@server1 ~]# service postfix status;service postfix restart;chkconfig postfix on;
master (pid 3261) is running...
Shutting down postfix:                                     [ OK ]
Starting postfix:                                          [ OK ]
yum install postfix dovecot squirrelmail -y
Loaded plugins: refresh-packagekit, security
other                                                                                                 | 1.3 kB     00:00 ...
Setting up Install Process
Resolving Dependencies
There are unfinished transactions remaining. You might consider running yum-complete-transaction first to finish them.
--> Running transaction check
---> Package dovecot.x86_64 1:2.0.9-2.el6_1.1 will be installed
---> Package postfix.x86_64 2:2.6.6-2.2.el6_1 will be installed
---> Package squirrelmail.noarch 0:1.4.22-3.el6 will be installed
--> Processing Dependency: php for package: squirrelmail-1.4.22-3.el6.noarch
--> Running transaction check
---> Package php.x86_64 0:5.3.3-3.el6_2.8 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=============================================================================================================================
Package                        Arch                     Version                                Repository              Size
=============================================================================================================================
Installing:
dovecot                        x86_64                   1:2.0.9-2.el6_1.1                      base                   1.9 M
postfix                        x86_64                   2:2.6.6-2.2.el6_1                      base                   2.0 M
squirrelmail                   noarch                   1.4.22-3.el6                           base                   4.1 M
Installing for dependencies:
php                            x86_64                   5.3.3-3.el6_2.8                        base                   1.1 M

Transaction Summary
=============================================================================================================================
Install       4 Package(s)

Total download size: 9.2 M
Installed size: 39 M
Downloading Packages:
-----------------------------------------------------------------------------------------------------------------------------
Total                                                                                         34 MB/s | 9.2 MB     00:00
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : 2:postfix-2.6.6-2.2.el6_1.x86_64                                                                          1/4
Installing : php-5.3.3-3.el6_2.8.x86_64                                                                                2/4
Installing : squirrelmail-1.4.22-3.el6.noarch                                                                          3/4
Installing : 1:dovecot-2.0.9-2.el6_1.1.x86_64                                                                          4/4
Verifying : squirrelmail-1.4.22-3.el6.noarch                                                                          1/4
Verifying : 1:dovecot-2.0.9-2.el6_1.1.x86_64                                                                          2/4
Verifying : php-5.3.3-3.el6_2.8.x86_64                                                                                3/4
Verifying : 2:postfix-2.6.6-2.2.el6_1.x86_64                                                                          4/4

Installed:
dovecot.x86_64 1:2.0.9-2.el6_1.1        postfix.x86_64 2:2.6.6-2.2.el6_1        squirrelmail.noarch 0:1.4.22-3.el6

Dependency Installed:
php.x86_64 0:5.3.3-3.el6_2.8

Complete!
############################### STEP 02 ##################################
[root@server1 ~]# service postfix status;service postfix restart;chkconfig postfix on;
master is stopped
Shutting down postfix:                                     [FAILED]
Starting postfix:                                          [ OK ]
[root@server1 ~]# service postfix status;service postfix restart;chkconfig postfix on;
master (pid 3261) is running...
Shutting down postfix:                                     [ OK ]
Starting postfix:                                          [ OK ]
service postfix status;service postfix restart;chkconfig postfix on;
master is stopped
Shutting down postfix:                                     [FAILED]
Starting postfix:                                          [ OK ]
[root@server1 ~]# service postfix status;service postfix restart;chkconfig postfix on;
master (pid 3261) is running...
Shutting down postfix:                                     [ OK ]
Starting postfix:                                          [ OK ]
################################## STEP 03 #####################################
[root@server1 ~]# vim /etc/postfix/main.cf

Change

From

75 #myhostname = host.domain.tld
83 #mydomain = domain.tld
99 #myorigin = $mydomain
113 #inet_interfaces = all
116 inet_interfaces = localhost
164 mydestination = $myhostname, localhost.$mydomain, localhost
165 #mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
419 #home_mailbox = Maildir/

To

75 myhostname = mail.example.com
83 mydomain = example.com
99 myorigin = $mydomain
113 inet_interfaces = all
116 #inet_interfaces = localhost
164 #mydestination = $myhostname, localhost.$mydomain, localhost
165 mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
419 home_mailbox = Maildir/
:wq save and quit

[root@server1 ~]# service postfix restart;chkconfig postfix on;service postfix status;
Shutting down postfix:                                     [ OK ]
Starting postfix:                                          [ OK ]
master (pid 3604) is running...

Read more

Postfix,SMTP Email Server on CentOS 6.3 OR Scientific Linux 6.3,RHEl 6.3

How to Configure DNS on CentOS 6.3 & RHEL 6.3,Scientific Linux 6.3

############################# STEP-01 ##########################
[root@localhost ~]# hostname
localhost.localdomain
root@localhost ~]# vim /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=server1.example.com

[root@server1 Desktop]# yum install bind -y
Loaded plugins: refresh-packagekit, security
other                                                                                                                  20/20
Setting up Install Process
Resolving Dependencies
There are unfinished transactions remaining. You might consider running yum-complete-transaction first to finish them.
--> Running transaction check
---> Package bind.x86_64 32:9.8.2-0.10.rc1.el6 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=============================================================================================================================
Package                 Arch                      Version                                     Repository               Size
=============================================================================================================================
Installing:
bind                    x86_64                    32:9.8.2-0.10.rc1.el6                       base                    4.0 M

Transaction Summary
=============================================================================================================================
Install       1 Package(s)

Total download size: 4.0 M
Installed size: 7.2 M
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : 32:bind-9.8.2-0.10.rc1.el6.x86_64                                                                         1/1
Verifying : 32:bind-9.8.2-0.10.rc1.el6.x86_64                                                                         1/1

Installed:
bind.x86_64 32:9.8.2-0.10.rc1.el6

Complete!

################################ STEP-02 ########################################

[root@server1 Desktop]# mkdir -p /bakup/dns
[root@server1 Desktop]# cp /etc/named.conf /bakup/dns/named.conf.original
[root@server1 Desktop]# cp /etc/named.rfc1912.zones /bakup/dns/named.rfc1912.zones.original
[root@server1 Desktop]# vim /etc/named.conf
From

11         listen-on port 53 { 127.0.0.1; };

            To

11         listen-on port 53 { 192.168.0.254; };

17         allow-query     { any; };

Save&exit
[root@server1 Desktop]# vim /etc/named.rfc1912.zones

From

13 zone "localhost.localdomain" IN {
14         type master;
15         file "named.localhost";
16         allow-update { none; };
17 };

31 zone "1.0.0.127.in-addr.arpa" IN {
32         type master;
33         file "named.loopback";
34         allow-update { none; };
35 };

To

13 zone "example.com" IN {
14         type master;
15         file "forward.zone";
16         allow-update { none; };
17 };

31 zone "0.168.192.in-addr.arpa" IN {
32         type master;
33         file "reverse.zone";
34         allow-update { none; };
35 };
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Install Howto

Install Howto

Advanced Command

Advanced Command