shell HowTo - Linux / Unix Q & A from nixCraft

How to extract tar.xz files in Linux and unzip all files

last updated May 24, 2020 in BASH Shell, CentOS, Debian / Ubuntu, Linux, RedHat and Friends, Suse

How do I extract tar.xz files in Linux? Can you tell me command to unzip linux-5.6.13.tar.xz file? How can I uncompressing (or decompressing) all files in the current directory?

awk / cut: Skip First Two Fields and Print the Rest of Line

last updated January 21, 2018 in BASH Shell, Debian / Ubuntu, Linux, RedHat and Friends, UNIX

I would like to skip first two or three fields at the the beginning of a line and print the rest of line. Consider the following input:
This is a test Giving back more than we take
I want my input file with the following output:
a test more than we take
How do I printing lines from the nth field using awk under UNIX or Linux operating systems?

Bash Remove Last Character From String / Line / Word

last updated April 12, 2014 in BASH Shell, Linux, UNIX

I have a file of that looks as follows:

foo bar
tom jerry
UNIX Linux

Each word and/or Linux is a different length. How do strip or remove the last character from each line using bash or ksh shell only?

Linux Display System Statistics Gathered From /proc

last updated March 18, 2011 in Linux

How do I display information from /proc such as memory, Load average, uptime, page activity, context, disk status, interrupts using a shell or perl script?

HowTo: Upgrade Debian 5.0 (Lenny) To Debian 6.0 (Squeeze)

last updated February 6, 2011 in Debian / Ubuntu

Debian 6.0 “Squeeze” has been released and how do I upgrade to Debian GNU/Linux 6.0 from the previous release, Debian GNU/Linux 5.0 (“Lenny”) using command prompt?

Linux exec-notify: Find Out Shell Escaping Applications [ Security Monitoring ]

last updated January 6, 2011 in BASH Shell

How do I watch or monitor applications that executed on a system and executes external programs via “bash”?

Verify: SSL Certificate Under OpenSSL

last updated December 7, 2010 in UNIX

All UNIX / Linux applications linked against the OpenSSL libraries can verify certificates signed by a recognized certificate authority (CA). How do I verify SSL certificates using OpenSSL command line toolkit itself under UNIX like operating systems without using third party websites?