Difference between revisions of "Xargs"
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cat foobar.txt | grep bar | xargs -I '{}' sed 's/foo/{}/g' file.txt | cat foobar.txt | grep bar | xargs -I '{}' sed 's/foo/{}/g' file.txt | ||
| − | Randomly shuffles output of grep of "us1234.thing.txt" and only prints up to the first instance of "." due to awk: | + | Randomly shuffles output of ls and grep of "/dir1/dir2/us1234.thing.txt" and only prints up to the first instance of "." due to awk: |
ls /dir1/dir2/ |grep us |awk -F "." '{print $1}' | xargs shuf -n1 -e | ls /dir1/dir2/ |grep us |awk -F "." '{print $1}' | xargs shuf -n1 -e | ||
Latest revision as of 14:12, 18 December 2019
xargs is a command on Unix and most Unix-like operating systems used to build and execute commands from standard input. It converts input from standard input into arguments to a command.
Some commands such as grep and awk can take input either as command-line arguments or from the standard input. However, others such as cp and echo can only take input as arguments, which is why xargs is used instead.
Usage
Pipe output from cat and grep into sed to replace "foo" with "bar" within file.txt:
cat foobar.txt | grep bar | xargs -I '{}' sed 's/foo/{}/g' file.txt
Randomly shuffles output of ls and grep of "/dir1/dir2/us1234.thing.txt" and only prints up to the first instance of "." due to awk:
ls /dir1/dir2/ |grep us |awk -F "." '{print $1}' | xargs shuf -n1 -e
