Do spaces matter in bash scripts?
It doesn’t matter much whether how many space you indent, though most people seem to use 4 spaces or 8. Just make sure that your do’s and done’s line up and you’ll be fine.
How do you space a shell script?
Whitespace safety in shell scripts. Whitespace is the set of blank characters, commonly defined as space, tab, newline and possibly carriage return. Its significance in shell scripts is that command line arguments are separated by whitespace, unless the arguments are quoted.
Why does my bash script choke on whitespace?
This answer applies to Bourne/POSIX-style shells ( sh, ash, dash, bash, ksh, mksh, yash …). Zsh users should skip it and read the end of When is double-quoting necessary? instead. If you want the whole nitty-gritty, read the standard or your shell’s manual.
How to remove all whitespace from a variable in Bash?
However, multiple spaces will be condensed to single spaces, so “foo bar” will become “foo bar”. In addition it doesn’t remove end of lines characters. Let’s define a variable containing leading, trailing, and intermediate whitespace: How to remove all whitespace (denoted by [:space:] in tr ):
Why do I get whitespace error in shell?
Having read that, you may wonder how people make whitespace errors in shell commands, but it becomes less obvious when variables are involved. This goes wrong because $var is expanded in the command line, and looks like ./printargs hello \\”material\\” world to your shell. This can be prevented by quoting the variable substitution.
How to remove leading spaces and trailing spaces in Bash?
How to remove both leading and trailing spaces–chain the sed s: Alternatively, if your bash supports it, you can replace echo -e “$ {FOO}” | sed with sed <<<$ {FOO}, like so (for trailing whitespace): There is a solution which only uses Bash built-ins called wildcards: Here’s the same wrapped in a function: