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When does parallel stop reading in GNU parallel?
GNU parallel can stop reading when it encounters a certain value: Output: Using –no-run-if-empty GNU parallel will skip empty lines. (echo 1; echo; echo 2) | parallel –no-run-if-empty echo Output: If no command is given after parallel the arguments themselves are treated as commands:
What happens if no command is given after parallel?
If no command is given after parallel the arguments themselves are treated as commands: Output (the order may be different): The command can be a script, a binary or a Bash function if the function is exported using export -f: Output (the order may be different): GNU parallel has several replacement strings.
How to run a shell script in parallel?
The script is exiting with an error message! The commands within each group run in parallel, and the groups run sequentially, each group of parallel commands waiting for the previous group to finish before starting execution. Assume 3 groups of commands as in the code below.
What are the replacement strings in GNU parallel?
The command can be a script, a binary or a Bash function if the function is exported using export -f: Output (the order may be different): GNU parallel has several replacement strings. If no replacement strings are used the default is to append {}:
Which is the output output of GNU parallel?
Output (the order may be different because the jobs are run in parallel): The input source can be a file: Output: Same as above. STDIN (standard input) can be the input source: Output: Same as above. GNU parallel can take multiple input sources given on the command line. GNU parallel then generates all combinations of the input sources:
How to run GNU parallel with stdin as input?
GNU parallel then generates all combinations of the input sources: Output (the order may be different): The input sources can be files: Output: Same as above. STDIN (standard input) can be one of the input sources using -: Output: Same as above. Instead of -a files can be given after :::::
What are the input sources in GNU parallel?
GNU parallel reads input from input sources. These can be files, the command line, and stdin (standard input or a pipe). Input can be read from the command line: Output (the order may be different because the jobs are run in parallel): The input source can be a file: Output: Same as above.