Difference between echo $(cal) and echo "$(cal)"
105006
What is wrong with “echo $(stuff)” or “echo `stuff`”?
30485
Why do I get different outputs in case of sh and bash?
18722
Should I use $* or $@?
136243
Accessing bash command line args $@ vs $*
138524
$* in bash scripting
11975
What does $@ mean in a shell script?
101999
What's is the difference between ">" and ">>" in shell command?
4759
Why is printf better than echo?
60843
How can I echo dollar signs?
33464
What is the difference between PHP echo and PHP return in plain English?
5618
$VAR vs ${VAR} and to quote or not to quote
25478
What does ${1+"$@"} mean in a shell script, and how does it differ from "$@"?
110007
What is the difference between operator "=" and "==" in Bash?
42711
What does $$ mean in the shell?
4615
What does $$ (dollar dollar or double dollar) mean in PHP?
54313
What is $() in a command?
30195
What's the difference between [ and [[ in Bash?