How to Configure a WebServer in Linux

Red Hat® Certified Engineer (RHCE®) is a Red Hat Certified System Administrator (RHCSA) who possesses additional skills, knowledge, and abilities required of a senior system administrator responsible for Red Hat Enterprise Linux® systems.

An RHCE is capable of:

    Configuring static routes, packet filtering, and network address translation.
    Setting kernel runtime parameters.
    Configuring an Internet Small Computer System Interface (iSCSI) initiator.
    Producing and delivering reports on system utilization.
    Using shell scripting to automate system maintenance tasks.
    Configuring system logging, including remote logging.
    Configuring a system to provide networking services, including HTTP/HTTPS, File Transfer        Protocol(FTP), network file system (NFS), server message block (SMB), Simple Mail Transfer Protocol (SMTP), secure shell (SSH) and Network Time Protocol (NTP).

Implement a webserver


CMD:

Install web server packages using yum command

root@linuxstorages:~#yum install httpd* -y

Configure the web server configuration in below path

root@linuxstorages:~#vim /etc/httpd/conf/httpd.conf

Copy the last 7 line and paste in last. Then change all dummy into your hostname

Change document root is /var/www/html

:wq!   

 Change directory to document root of web server

root@linuxstorages:~#cd /var/www/html

Connect FTP server using lftp command 

root@linuxstorages:~#lftp server id

>cd /var/www/ftp

>get data.html

>bye

get - download file from server to local

bye - exit ftp server connection

Rename data.html to index.html

root@linuxstorages:~#mv data.html index.html

Enter ip address details in host file

root@linuxstorages:~#vim /etc/hosts

Add   ipaddress    hostname(fully)        hostname(half)
               
xx.xx.xx.xx    user.linuxstorages.com   user.linuxstorages

:wq!

Check status of web server configuration file after configuring

         root@linuxstorages:~#httpd -t
         syntax ok

        root@linuxstorages:~#service httpd restart

        root@linuxstorages:~#chkconfig httpd on

Check the URL using elinks command in terminal

root@linuxstorages:~#elinks user.linuxstorages.com

By: Unknown On 10:00 AM

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Email Forwarding In Linux

Red Hat® Certified Engineer (RHCE®) is a Red Hat Certified System Administrator (RHCSA) who possesses additional skills, knowledge, and abilities required of a senior system administrator responsible for Red Hat Enterprise Linux® systems.

An RHCE is capable of:

    Configuring static routes, packet filtering, and network address translation.
    Setting kernel runtime parameters.
    Configuring an Internet Small Computer System Interface (iSCSI) initiator.
    Producing and delivering reports on system utilization.
    Using shell scripting to automate system maintenance tasks.
    Configuring system logging, including remote logging.
    Configuring a system to provide networking services, including HTTP/HTTPS, File Transfer        Protocol(FTP), network file system (NFS), server message block (SMB), Simple Mail Transfer Protocol (SMTP), secure shell (SSH) and Network Time Protocol (NTP).

Configure an email alias for your MTA such that mail sent to admin is received by the local user sowmya

CMD:

root@linuxstorages:~#vim /etc/aliases

admin:    sowmya

:wq!

Reload the configuration file by using newaliases command

root@linuxstorages:~#newaliases 

By: Unknown On 10:00 AM

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How to configure NFS Server In Linux

Red Hat® Certified Engineer (RHCE®) is a Red Hat Certified System Administrator (RHCSA) who possesses additional skills, knowledge, and abilities required of a senior system administrator responsible for Red Hat Enterprise Linux® systems.

An RHCE is capable of:

    Configuring static routes, packet filtering, and network address translation.
    Setting kernel runtime parameters.
    Configuring an Internet Small Computer System Interface (iSCSI) initiator.
    Producing and delivering reports on system utilization.
    Using shell scripting to automate system maintenance tasks.
    Configuring system logging, including remote logging.
    Configuring a system to provide networking services, including HTTP/HTTPS, File Transfer        Protocol(FTP), network file system (NFS), server message block (SMB), Simple Mail Transfer Protocol (SMTP), secure shell (SSH) and Network Time Protocol (NTP).

Export your /central directory via NFS to the linuxstorages.com domain only.

CMD: 

 Install NFS packages using yum command

root@linuxstorages:~# yum install nfs* -y

Edit the nfs configuration file

root@linuxstorages:~#vim /etc/exports

/central                   *.linuxstorages.com(rw,sync)

:wq(save file)

Restart nfs service after configuring the configuration file.

root@linuxstorages:~#service nfs restart

root@linuxstorages:~#chkconfig nfs on 

Use exportfs command to check configuration is working fine

root@linuxstorages:~#exportfs

 

By: Unknown On 7:58 PM

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How To Configure Samba Server In Linux

Red Hat® Certified Engineer (RHCE®) is a Red Hat Certified System Administrator (RHCSA) who possesses additional skills, knowledge, and abilities required of a senior system administrator responsible for Red Hat Enterprise Linux® systems.

An RHCE is capable of:

    Configuring static routes, packet filtering, and network address translation.
    Setting kernel runtime parameters.
    Configuring an Internet Small Computer System Interface (iSCSI) initiator.
    Producing and delivering reports on system utilization.
    Using shell scripting to automate system maintenance tasks.
    Configuring system logging, including remote logging.
    Configuring a system to provide networking services, including HTTP/HTTPS, File Transfer        Protocol(FTP), network file system (NFS), server message block (SMB), Simple Mail Transfer Protocol (SMTP), secure shell (SSH) and Network Time Protocol (NTP).

 Share the /central directory via SMB:

CMD:

Install smaba packages using yum 

 root@linuxstorages:~#yum install samba* -y

Configure samba configuration file 

    root@linuxstorages:~#vim /etc/samba/smb.conf
    change workgroup as STAFF in line no 74

                   Add
    
                   [common]

                    Path = /central

                    Browseable = yes

                    Writeable = yes

                    Host allow = 192.168.0.

                    Valid user = sowmya

    :wq

Create shared directory

root@linuxstorages:~#mkdir /central

Create samba user and password 

root@linuxstorages:~#smbpasswd -a sowmya

Use this command if selinux is enabled for selinux permission

root@linuxstorages:~#chcon -Rt samba_share_t   /central   

Restart samba service and enable in chkconfig

root@linuxstorages:~#service smb restart

root@linuxstorages:~#chkconfig smb on

check the share directory with the ipaddress  

root@linuxstorages:~#smbclient //ipaddress/common -U sowmya  
 

By: Unknown On 9:31 PM

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How To Configure FTP Access In Linux

Red Hat® Certified Engineer (RHCE®) is a Red Hat Certified System Administrator (RHCSA) who possesses additional skills, knowledge, and abilities required of a senior system administrator responsible for Red Hat Enterprise Linux® systems.

An RHCE is capable of:

    Configuring static routes, packet filtering, and network address translation.
    Setting kernel runtime parameters.
    Configuring an Internet Small Computer System Interface (iSCSI) initiator.
    Producing and delivering reports on system utilization.
    Using shell scripting to automate system maintenance tasks.
    Configuring system logging, including remote logging.
    Configuring a system to provide networking services, including HTTP/HTTPS, File Transfer        Protocol(FTP), network file system (NFS), server message block (SMB), Simple Mail Transfer Protocol (SMTP), secure shell (SSH) and Network Time Protocol (NTP).

 Configure FTP access on your system


CMD:

First install FTP packages in your system

root@linuxstorages:~#yum install vsftpd* -y

Edit hosts.deny file for deny particular domain

root@linuxstorages:~#vim /etc/hosts.deny

ADD following line in this file

vsftpd:              ALL EXCEPT               *.linuxstoraages.com


:wq!

Restart FTP service after change in configuration file

root@linuxstorages:~#service vsftpd restart

Add a ftp service in chkconfig

root@linuxstorages:~#chkconfig vsftpd on

By: Unknown On 7:55 PM

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How To Configure SSH Access In Linux

Red Hat® Certified Engineer (RHCE®) is a Red Hat Certified System Administrator (RHCSA) who possesses additional skills, knowledge, and abilities required of a senior system administrator responsible for Red Hat Enterprise Linux® systems.

An RHCE is capable of:

    Configuring static routes, packet filtering, and network address translation.
    Setting kernel runtime parameters.
    Configuring an Internet Small Computer System Interface (iSCSI) initiator.
    Producing and delivering reports on system utilization.
    Using shell scripting to automate system maintenance tasks.
    Configuring system logging, including remote logging.
    Configuring a system to provide networking services, including HTTP/HTTPS, File Transfer        Protocol(FTP), network file system (NFS), server message block (SMB), Simple Mail Transfer Protocol (SMTP), secure shell (SSH) and Network Time Protocol (NTP).

Configure SSH access


CMD:

Install SSH server in your system using yum command

root@linuxstorages:~#yum install open-ssh-server* -y

Block  ip which need to in hosts.deny file

root@linuxstorages:~#vim /etc/hosts.deny

ADD following line in this file

sshd:            192.168.1.1/255.255.255.0

:wq!  (save file)

Restart the SSH service after changing configuration file

root@linuxstorages:~#service sshd restart

Enable in chkconfig service

root@linuxstorages:~#chkconfig sshd on

By: Unknown On 7:44 PM

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How To Enable Selinux Enforcing In Linux

A Red Hat® Certified Engineer (RHCE®) is a Red Hat Certified System Administrator (RHCSA) who possesses additional skills, knowledge, and abilities required of a senior system administrator responsible for Red Hat Enterprise Linux® systems.

An RHCE is capable of:

    Configuring static routes, packet filtering, and network address translation.
    Setting kernel runtime parameters.
    Configuring an Internet Small Computer System Interface (iSCSI) initiator.
    Producing and delivering reports on system utilization.
    Using shell scripting to automate system maintenance tasks.
    Configuring system logging, including remote logging.
    Configuring a system to provide networking services, including HTTP/HTTPS, File Transfer Protocol        (FTP), network file system (NFS), server message block (SMB), Simple Mail Transfer Protocol (SMTP), secure shell (SSH) and Network Time Protocol (NTP).
  

 Enable SELINUX enforcing mode

CMD:

First check the selinux status by using getenforce commad

root@linuxstorages:~#getenforce
Premissive

Change the selinux status to enforcing in configuration

root@linuxstorages:~#vim /etc/selinux/config
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#       enforcing - SELinux security policy is enforced.
#       permissive - SELinux prints warnings instead of enforcing.
#       disabled - SELinux is fully disabled.
SELINUX=enforcing
# SELINUXTYPE= type of policy in use. Possible values are:
#       targeted - Only targeted network daemons are protected.
#       strict - Full SELinux protection.
SELINUXTYPE=targeted

Restart the system

root@linuxstorages:~#init 6

Now check the status,

root@linuxstorages:~#getenforce
Enforcing

By: Unknown On 6:50 PM

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Ip Forwarding In Linux

A Red Hat® Certified Engineer (RHCE®) is a Red Hat Certified System Administrator (RHCSA) who possesses additional skills, knowledge, and abilities required of a senior system administrator responsible for Red Hat Enterprise Linux® systems.

An RHCE is capable of:

    Configuring static routes, packet filtering, and network address translation.
    Setting kernel runtime parameters.
    Configuring an Internet Small Computer System Interface (iSCSI) initiator.
    Producing and delivering reports on system utilization.
    Using shell scripting to automate system maintenance tasks.
    Configuring system logging, including remote logging.
    Configuring a system to provide networking services, including HTTP/HTTPS, File Transfer Protocol (FTP), network file system (NFS), server message block (SMB), Simple Mail Transfer Protocol (SMTP), secure shell (SSH) and Network Time Protocol (NTP).

Enable IP forwarding

CMD:

root@linuxstorages:~#vim /etc/sysctl.conf

change from 0 to 1

root@linuxstorages:~#sysctl -p

By: Unknown On 6:17 PM

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