What does if [ $? -eq 0 ] mean for shell scripts?
6462
Meaning of $? (dollar question mark) in shell scripts
7431
How does ${!#} work in bash to get the last command-line argument?
123684
Test for non-zero length string in Bash: [ -n "$var" ] or [ "$var" ]
89588
Why do I need to quote variable for if, but not for echo?
53269
bash - True if the length of string is (non)zero?
58687
What is the difference between $(command) and `command` in shell programming?
18438
Spaces in variable assignments in shell scripts
23849
Test condition in if command
125067
What is "#!' in a script file?
50416
What does the >?= operator mean?
152938
How can I run a command if one or more conditions in /execute are satisfied?
37805
Why does set -e not work inside subshells with parenthesis () followed by an OR list ||?
144302
Do command line options take an equals sign between option name and value?
14252
How to represent multiple conditions in a shell if statement?
56072
How do I compare two string variables in an 'if' statement in Bash?
22122
How do you use the ? : (conditional) operator in JavaScript?
19713
Why do shell script comparisons often use x$VAR = xyes?