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How do you pass a space in a shell script?
Arguments can be passed to the script when it is executed, by writing them as a space-delimited list following the script file name. Inside the script, the $1 variable references the first argument in the command line, $2 the second argument and so forth. The variable $0 references to the current script.
Does spaces matter in shell script?
The lack of spaces is actually how the shell distinguishes an assignment from a regular command. Also, spaces are required around the operators in a [ command: [ “$timer”=0 ] is a valid test command, but it doesn’t do what you expect because it doesn’t recognize = as an operator.
How do I remove spaces from a variable in UNIX?
${var/ /} removes the first space character. ${var// /} removes all space characters. There’s no way to trim just leading and trailing whitespace with only this construct.
How to loop through arguments in a bash script?
I would like to write a bash script with unknown amount of arguments. How can I walk through these arguments and do something with them? More generally, the list of parameters of the current script or function is available through the special variable $@.
Why do I have spaces in my bash script?
Are you sure the problem isn’t that your shell script is changing directory in its subshell, but then you’re back in the main shell (and original dir) when done? I avoided that by using . to run the script in the current shell, though most folks would just use an alias for this. The spaces could be a red herring.
How to change the meaning of a file in Bash?
There are four elements that will alter the meaning of the file output read by many Bash solutions: The blank line 4; Leading or trailing spaces on two lines; Maintaining the meaning of individual lines (i.e., each line is a record); The line 6 not terminated with a CR.
How to read from a file descriptor in Bash?
Open the file, read from a file descriptor (in this case file descriptor #4). This is no better than other answers, but is one more way to get the job done in a file without spaces (see comments). I find that I often need one-liners to dig through lists in text files without the extra step of using separate script files.