Bash Shell: Find Out If a Variable Is Empty Or Not
Posted on in Categories BASH Shell, CentOS, Debian / Ubuntu, FreeBSD, Linux, Suse, UNIX last updated January 21, 2017
Tag: bash shell scripting
Bash Check If Shell Is Interactive or Not Under Linux / Unix Oses
Posted on in Categories BASH Shell last updated November 5, 2012Grep Include Only *.txt File Pattern When Running Recursive Mode
Posted on in Categories BASH Shell, Linux, UNIX last updated October 25, 2012I‘m using Debian Linux as my development workstation. I would like to search a directory called ~/projects/ recursively for “foo” word only for *.txt files. How do I search all text files in ~/projects/ for “foo” word using grep command?
Bash Shell: Check If A Function Exists Or Not (Find Out If a Function Is Defined Or Not)
Posted on in Categories BASH Shell, Linux, UNIX last updated April 2, 2010How do I determine if a function called foo() is already defined in a bash script or not? If a function called foo() is defined just call it or show an error message?
BASH Shell: Test If a File Is Writable or Not
Posted on in Categories AIX, BASH Shell, CentOS, Debian / Ubuntu, Fedora Linux, FreeBSD, HP-UX Unix, Linux, Openbsd, Solaris-Unix, Suse, Ubuntu Linux, UNIX last updated December 12, 2008Q. How can you test if a file is writable under UNIX / Linux bash shell scripting?
Bash Append Text To a Variable
Posted on in Categories BASH Shell, CentOS, Debian / Ubuntu, FreeBSD, Linux, RedHat and Friends, Suse, Ubuntu Linux, UNIX last updated February 4, 2013How do I append additional text a variable? For e.g., I’ve a vech set as follows:
vech=”London”
I’d like to add (append) “Bus” word to $vevh under UNIX scripting using bash?