Linux

Articles for Linux

Linux Commands Examples

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find                                              Search files and folders crontab                                       Schedules the jobs ls                                                  Directory listing iptables                                       Firewall netstat                                         Connection status

How to create NFS Share on CentOS

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How to create NFS Share on CentOS NFS services should be install  check the services service nfs status which folder you want to share for Example /home/ISOFiles NFS share information kept in /etc/exports file so edit the file and add your share information nano /etc/exports add the line for your share and the host or … Read more

How to transfer files between linux and windows over ssh

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1- how to transfer files between linux servers over ssh #scp source  username@destination ip:/destination path For example :- I want to transfer files from local linux machine to remote linux server over ssh #scp abc.tar  root@192.168.1.1:/var/ How to transfer files between Windows  to Linux  over ssh. download winscp from link http://winscp.net/eng/download.php Install winscp Login to … Read more

SSH Session recording script

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SSH Session recording script If you want to record your root ssh session  create a file .bash_profile  . and copy below line by line change the email address where you want to recive the SSH log mail. nano /root/.bash_profile CURDATE=$(date +%F-%T) RAND=$RANDOM EMAILS=”user@example.com otherrecipient@example.com” script -f -q /tmp/session-$USER-$CURDATE-$RAND.log for EMAIL in $EMAILS; do cat “/tmp/session-$USER-$CURDATE-$RAND.log” … Read more

Backup in Linux

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Backup in Linux $ tar   cvf    backup.tar  . C = create an archive V = verbose mode f = file name . = current directory Display the content of tar file $ tar  tvf   backup.tar t = table of content To extract tar file $ tar  xvf  backup.tar X = extract Using tar with compression … Read more

How to install ntop on CentOS

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How to install ntop on CentOS Follow the following steps 1-  Install rpmforge repository: http://wiki.centos.org/AdditionalResources/Repositories/RPMForge Choose your CentOS vesion and install rpmforge repository 2- # yum install ntop 3-  There is a bug in the /etc/init.d/ntop startscript we need to fix. #  nano  /etc/init.d/ntop change the line at start function from: daemon $prog -d -L … Read more

How to Bind Multiple IP Addresses to a Single Network Interface Card (NIC)

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How to Bind Multiple IP Addresses to a Single Network Interface Card (NIC) Network card information are located in /etc/sysconfig/network-scripts/. Go into that directory. cd /etc/sysconfig/network-scripts/ The file we’re interested in is ifcfg-eth0, the interface for the Ethernet device. Let’s assume we want to bind three additional IP’s (10.34.10.1, 10.34.10.2, and 10.34.10.3) to the NIC. We … Read more

Step by Step Cacti installation for Monitoring on Cent OS

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Step by Step Cacti installation for Monitoring on Cent OS Login as root Create the yum repository to install cacti through  yum #cd /var # mkdir download # wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.2-2.el5.rf.i386.rpm # rpm –import http://apt.sw.be/RPM-GPG-KEY.dag.txt # rpm -ivh rpmforge-release-0.5.2-2.el5.rf.i386.rpm #yum update Install required component for Cacti # yum install mysql-server mysql php-mysql php-pear php-common php-gd php-devel … Read more

How to install SNMP client on Cent OS / Linux

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How to install SNMP client on Cent OS / Linux Login as root # yum install net-snmp-utils Rename the snmpd.conf # mv /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.org # nano /etc/snmp/snmpd.conf copy and paste below line rocommunity  public syslocation  “Your Datacenter” syscontact   support@yourdomain.com save the file and exit Start the SNMP service on linux # /etc/init.d/snmpd start # chkconfig … Read more