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How does a pipe pass output of one command to another?
A pipe | passes the standard output of a command into the standard input of another one. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers.
How to make the output of one command an option to another?
One usually uses xargs to make the output of one command an option to another command. For example: But while that was your question, it’s not what you really want to know. If you don’t mind storing your tty in a variable, you can use bash variable mangling to do your substitution:
How to use the ouput of a command?
I’m looking for a way to use the ouput of a command (say command1) as an argument for another command (say command2). I encountered this problem when trying to grep the output of who command but using a pattern given by another set of command (actually tty piped to sed ). I want only the line (s) regarding “pts/5” So I piped tty to sed as follows:
How to use the output of Bash command?
Here’s a version that does work because it spawns a subshell with the already modified environment (that has TTY ): The result is left in $WHOLINE. One usually uses xargs to make the output of one command an option to another command. For example:
How to substitute the output of a command into the command line?
The tool for that is a command susbtitution. If you put a command inside $ (…) (dollar-parenthesis), its output is substituted into the command line.
How to pass the output of command1 to command2?
Pass output of command1 through xargs using substitution (the braces) to command2. If command1 is find be sure to use -print0 and add -0 to xargs for null terminated strings and xargs will call command2 for each thing found.
When to use double quotes in a command?
With the double quotes, the output of the command is used directly as a single parameter (the only transformation is that newlines at the end of the output are removed). I generally use `command` to place it’s output as argument to another command. For e.g., to find resource consumed by process foo on freebsd will be: