PPID
suggest changeThe Process ID (pid) of the script or shell’s parent, meaning the process than invoked the current script or shell.
~> $ echo $$
13016
~> $ echo $PPID
13015
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Table Of Contents
4 Aliasing
9 Arrays
10 Functions
12 Sourcing
13 Find
15 Quoting
19 Math
20 Scoping
27 Debugging
28 Pitfalls
32 Change shell
35 Job control
38 Read a file
40 Pipelines
48 Using sort
49 Namespace
50 co-processes
59 Cut command
63 CGI Scripts
67 Parallel
68 Grep
69 Strace
70 Sleep
71 Decodi
72 Contributors