How to use tcpdump Command With Examples on Linux CentOS 5/CentOS 6/RHEL 5/RHEL 6
Tcpdump is a tool to dump the traffic on a network. It’s a packet sniffer that able to capture traffic that passes through a machine. It operates on a packet…
How to Grep Multiples Lines and using Specific Keyword on Linux
grep is a command line text search utility originally written for Unix or linux. In linux you can grep multiple lines before or after matching the keywords. This examples has…
How to Install tcpdump on CentOS 5/CentOS 6/RHEL 5/RHEL 6
Tcpdump is a packet sniffer that able to capture traffic that passes through a machine. It operates on a packet level, meaning that it captures the actual packets that fly…
How to Install and Configure yum-priorities on RHEL 6/CentOS 6
In this post, i will show on how to install and configure yum-priorities on CentOS 6 or RHEL 6 Linux server. Theoretically, the repositories with the lowest numerical priority number…
How to Create and Extract a gzip Compressed Archive File on Linux
Archiving and compressing files are useful when creating backups and transferring data across a network. One of the oldest and most common commands for creating and working with the backup…
How to use Basic Regular Expression with grep command on Linux
Regular expressions are special text strings that used to search for and match patterns in text. To make the search expression more specific, it can work together with the grep…
How to Open the File in Read Only Mode on Linux
Question : How to open a file on read only mode on linux? Answer : This command has been tested on Redhat Enterprise linux 6 (RHEL6) server. To open the…
How Display Logged in User Information and Terminal number on Linux Server
In this post i will show on how to display logged in user information and terminal number on Linux server. This post provides practical examples for future references. This steps…
Question : I want to start the Zimbra services. But i am getting the following issue while restarting zmcontrol using “zmcontrol start” command as per below error messages : [zimbra@mail…
How to Add Persistent Static Routes on RHEL 6/CentOS 6
This example will show you on how to configure the Persistent static route in RedHat Enterprise Linux 6 (RHEL 6) server. This configuration may different with other version of RHEL…
How to Install nmap on RHEL 6 Linux Server
Nmap (“Network Mapper”) is a free and open source tool for network exploration or security auditing. It can help you to find open port on a network. Nmap very useful…
How to Install and Configure Bind Chroot DNS Server on RHEL 6
In this post, i will guide you on how to install and configure Bind Chroot DNS server on Redhat Enterprise Linux 6 (RHEL 6). DNS is the Domain Name System…