Linux

tac –help tac –version tac filename tac abc.txt tac file1 file2 … tac abc.txt def.txt tac -b abc.txt def.txt tac -r abc.txt def.txt echo “Sandy,Mandy” | tac   echo “Sandy,Mandy” | tac -s , echo “Sandy,Mandy” | tac -b -s ,

  last –help   last –version last   last -number   last -5   last -a   last -d   last -f filename   last -F   last -i   last -n   last -R username   last -s last -t last -p     last -w username   last -x last -s -5days -t

md5sum –help md5sum –version md5sum abc.txt md5sum -b abc.txt md5sum –tag abc.txt md5sum -t abc.txt md5sum -z abc.txt md5sum -c abc.md5 md5sum –quiet -c abc.md5 md5sum –warn -c abc.md5

whoami command in Linux is used to display the name of the currently logged-in user in a shell. It displays the user name associated with the current effective user ID. Uses of whoami command with example To get help about whoami command and find available options for whoami command, use whoami –help command. whoami –help Display

wc command is an abbreviation for word count and wc command is mainly used for counting purpose. It is used to count the number of characters, words, new lines, and bytes in a file or standard input. In this tutorial, you will learn about wc command in Linux/Unix and the uses of wc command with

The main purpose of the w command is to monitor users. w command in Linux displays currently logged-in users and what they are doing. It also shows the system load average, login time, idle time, from where users are logged in etc. In this tutorial you will learn about w command in Linux/Unix and use

free command in Linux displays the summary of RAM usage. It shows the information about the total amount of used, free,  swap and buffers memory. In this tutorial, you will learn about free command in Linux/Unix and uses of free command with examples. Syntax of free command free [OPTIONS] Options available with free command To know

factor command in Linux is used to print the prime factor of any given number. In this tutorial, you will learn factor command in Linux/Unix and uses of factor command with example. Prime factor: A factor which is a prime number and not a composite number is a prime factor. Prime Number: A number that can

  id –help id –version id id -u   id -g id -G id -un   id -ur id -znG id programbr id -G programbr id -g programbr id -u programbr id -ng programbr id -nu programbr id -nG programbr  

iostat command is used to find CPU usage and other connected Input/Output devices. iostat command is useful for evaluating the performance of I/O devices, and their efficiency. It is also helpful for monitoring CPU Usage. How to Install iostat command? By default, iostat command is already installed in Linux/Unix. If it is not installed, you