fi HowTo - Linux / Unix Q & A from nixCraft

Bash Shell Script To Test For Empty Folder

last updated July 6, 2012 in BASH Shell

How do I check if a directory contains files? How do I find out if a directory contains files using bash shell under Linux or Unix like operating systems?

Bash Shell: Check File Exists or Not

last updated April 20, 2012 in BASH Shell

How do I test existence of a text file in bash running under Unix like operating systems?

Bash Shell: Find Out If a Variable Is Set or Not

last updated September 25, 2011 in BASH Shell

How do I check if a bash shell variable called $input is defined or not under BSD / Apple OS X / Unix / Linux like operating systems?

Linux / UNIX: Run Commands When You Log Out

last updated November 23, 2010 in Linux, UNIX

I’ve written a Perl script that connects to our central server for me and it allows me feed data so that I make a timesheet later. How do I run my script when I log out from Apple OS X or Linux / UNIX workstation using bash shell?

Bash: Continue In a For / While Loop

last updated January 29, 2011 in BASH Shell

How do I continue in a for or while loop in Bash under UNIX or Linux operating systems?

Linux / UNIX: For Loop To Remove Files

last updated July 15, 2011 in UNIX

How do I use a for loop in Unix to remove files?

Linux / UNIX: Check If File Is Empty Or Not Using Shell Script

last updated December 12, 2018 in BASH Shell, Linux, UNIX

How do I check if a file is empty or not using bash or ksh shell script under a UNIX / Linux / macOS / OS X / BSD family of operating systems? How do I check if a file is empty in Bash?