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I do have a Bash list (space separated string) and I just want to extract the first string from it.
Example:
VAR="aaa bbb ccc" -> I need "aaa"
VAR="xxx" -> I need "xxx"
Is there another trick than using a for with break?
777
To access the first character of a string, we can use the (substring) parameter expansion syntax ${str:position:length} in the Bash shell. position: The starting position of a string extraction.
It turns out, $() is called a command substitution. The command in between $() or backticks (“) is run and the output replaces $() . It can also be described as executing a command inside of another command.
The -r tests if the file exists and if you have read permission on the file. Bash scripting tutorial - if statement. The meaning of -r depends on what program/command it is given as an argument for. In this case it is for [ , and means to check whether the file named by the next argument is readable.
Use cut:
echo $VAR | cut --delimiter " " --fields 1 # Number after fields is the
# index of pattern you are retrieving
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