How to assign output of shell command to variable in Bash?
To assign output of any shell command to variable in bash, use the following command substitution syntax: var=$(command-name-here) var=$(command-name-here arg1) var=$(/path/to/command) var=$(/path/to/command arg1 arg2) OR.
Why do I need to store my Bash output in variables?
Sorry, there is a loong answer, but as bash is a shell, where the main goal is to run other unix commands and react to resut code and/or output, ( commands are often piped filter, etc… ). Storing command output in variables is something basic and fundamental.
How to get the result of command in a variable in Windows?
This could be used as ” myCmd > tmp.txt ” with ” set /P myVar=
How do you set a variable in Bash?
When setting a variable make sure you have no spaces before and/or after the = sign. I literally spent an hour trying to figure this out, trying all kinds of solutions! This is not cool.
How can I assign the output of a command?
So what you wrote assigns an empty value to thefile; furthermore, since the assignment is grouped with a command, it makes thefile an environment variable and the assignment is local to that particular command, i.e. only the call to ls sees the assigned value. You want to capture the output of a command, so you need to use command substitution:
How to store the output of a shell command?
To store date command output to a variable called now, enter: To display back result (or output stored in a variable called $now) use the echo or printf command: You can combine the echo command and shell variables as follows: You can do command substitution in an echo command itself (no need to use shell variable):
Is the result of an executed Shell command?
While this answer doesn’t work for the “more general question being asked”, I think it should always be considered. It is not always the “right answer”, even where possible. Remembering this (easier), and knowing when (not) to apply it (more difficult), will make you a better programmer.
How to assign result to variable in PowerShell?
2) 1 PowerShell helpfully for the command line, but not so helpfully in scripts has some extra logic when assigning the result of a pipeline to a variable: if no objects are returned then set $null, if one is returned then that object is assigned, otherwise an array is assigned.