Bash quirks

Don’t use spaces before or after = when declaring variables

No:

1
2
msg = "hello"
echo $msg

1
msg: command not found

No:

1
2
msg= "hello"
echo $msg

1
hello: command not found

Yep:

1
2
msg="hello"
echo $msg

1
hello

Use quotes around a variable for multiline output

No:

1
2
3
4
msg="\
hello
multiline"
echo $msg

1
hello multiline

Yep:

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2
3
4
msg="\
hello
multiline"
echo "$msg"

1
2
hello
multiline

if or if [ ] or if [[ ]] or if [[[ ]]]??? I don’t know!

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