bash - Shell equality operators (=, ==, -eq) - Stack Overflow
529 = and == are for string comparisons -eq is for numeric comparisons -eq is in the same family as -lt, -le, -gt, -ge, and -ne == is specific to bash (not present in sh (Bourne shell), ...). Using …
What do the -n and -a options do in a bash if statement?
The switches -a and -n are not strictly part of a bash if statement in that the if command does not process these switches. What are primaries? I call them "switches", but the bash …
bash - Confusing use of && and - Unix & Linux Stack Exchange
bash shell scripting control-flow Improve this question edited Nov 16, 2011 at 22:16 Gilles 'SO- stop being evil'
bash - What is indirect expansion? What does $ {!var*} mean?
Dec 15, 2011 · Bash uses the value of the variable formed from the rest of parameter as the name of the variable; this variable is then expanded and that value is used in the rest of the …
How to compare strings in Bash - Stack Overflow
Feb 10, 2010 · How do I compare a variable to a string (and do something if they match)?
syntax - Ternary operator (?:) in Bash - Stack Overflow
@dutCh's answer shows that bash does have something similar to the "ternary operator" however in bash this is called the "conditional operator" expr?expr:expr (see man bash goto section …
An "and" operator for an "if" statement in Bash - Stack Overflow
Modern shells such as Bash and Zsh have inherited this construct from Ksh, but it is not part of the POSIX specification. If you're in an environment where you have to be strictly POSIX …
sh - [: missing `]' in bash script - Stack Overflow
Feb 9, 2016 · A bash function has no line numbers related to the FILE that contains the definition. NOW: The code is stored somewhere internally in the running instance of Bash - does it …
How do I get the directory where a Bash script is located from …
How do I get the path of the directory in which a Bash script is located, inside that script? I want to use a Bash script as a launcher for another application. I want to change the working directo...
bash - When do we need curly braces around shell variables?
In shell scripts, when do we use {} when expanding variables? For example, I have seen the following: