Author Archives: Farzand Ali

Ethtool utility is used to view and change the ethernet device parameters. 1. List Ethernet Device Properties When you execute ethtool command with a device name, it displays the following information about the ethernet device. # ethtool eth0 Settings for eth0: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full SupportsContinue reading “9 Linux ethtool Examples to Manipulate Ethernet Card (NIC Card)”

How do I add a new path to $PATH variable under Linux and UNIX like operating system? What is my path, and how do I set or modify it using csh/tcsh or bash/ksh/sh shell? The PATH is an environment variable. It is a colon delimited list of directories that your shell searches through when youContinue reading “UNIX / Linux: Set your PATH Variable Using set or export Command”

What is chgrp? 5 chgrp Examples 1. To change the group name of a file or directory You can change the group of a file as shown below, $ ls -l -rw-r–r– 1 john john 210 2011-01-04 16:01 /home/john/sample.txt $ chgrp user /home/john/sample.txt $ ls -l -rw-r–r– 1 john user 210 2011-01-04 16:01 /home/john/sample.txt 2.Continue reading “5+ Practical “chgrp” Command Usage Examples in Linux”

On Linux, you can setup disk quota using one of the following methods: File system base disk quota allocation User or group based disk quota allocation On the user or group based quota, following are three important factors to consider: Hard limit – For example, if you specify 2GB as hard limit, user will notContinue reading “Disk quota in Linux”

Vi is a powerful text editor included with most Linux systems, even embedded ones. Sometimes you’ll have to edit a text file on a system that doesn’t include a friendlier text editor, so knowing Vi is essential. Unlike Nano, an easy-to-use terminal text editor, Vi doesn’t hold your hand and provide a list of keyboardContinue reading “A Beginner’s Guide to Editing Text Files With Vi”

An egrep example with multiple regular expressions Summary: How to use the Linux egrep command with multiple regular expressions (regex patterns). As a quick note here today, I just used the Linux egrep command to perform a case-insensitive search on multiple regular expressions (regex patterns). Really, what I did was a little more complicated: locate -i calendar |Continue reading “egrep and fgrep”

1. Display username, hostname and current working directory in the prompt The PS1 in this example displays the following three information in the prompt: \u – Username \h – Hostname \w – Full path of the current working directory -bash-3.2$ export PS1=”\u@\h \w> ” ramesh@dev-db ~> cd /etc/mail ramesh@dev-db /etc/mail> 2. Display current time inContinue reading “Bash Shell PS1: 10 Examples to Change Your Linux Prompt”

Q. Can you explain how do I use cpio under Linux / UNIX? A. GNU cpio is a tool for creating and extracting archives, or copying files from one place to another. It handles a number of cpio formats as well as reading and writing tar files. cpio command works just like tar, only better.Continue reading “How do I use cpio command under Linux?”

What is file? The file command accepts a file as an argument and performs certain tests to determine the correct file type. For example text, executable etc. 5 file Examples 1. A basic example The following basic example determines the file type for all the files present in current directory. $ file * cmd: ELFContinue reading “5 UNIX / Linux file Command Examples”