$ ./s1
Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 3.16.0-4-amd64, x86_64
Distribution : Debian 8.6 (jessie)
bash GNU bash 4.3.30
parallel GNU parallel 20130922
-----
Input data file data1:
a
b
c
d
-----
Script to be run in parallel, "inner":
#!/usr/bin/env bash
# @(#) inner Demonstrate one process to be run.
echo " Hello world from $$ with input values" \""$*"\"
exit 0
-----
Results:
Hello world from 4452 with input values "a"
Hello world from 4453 with input values "b"
Hello world from 4454 with input values "c"
Hello world from 4455 with input values "d"
The heart of the solution is the line:
Code:
parallel -j4 ./inner {}
which runs the inner script up to 4 times in parallel, each process with a data item from a line in file data1, which in turn is supplied to parallel by the cat command earlier in the pipeline.
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