BASHPID

Process ID (pid) of the current instance of Bash. This is not the same as the $$ variable, but it often gives the same result. This is new in Bash 4 and doesn’t work in Bash 3.

~> $ echo "\$\$ pid = $$  BASHPID = $BASHPID"
$$ pid = 9265  BASHPID = 9265

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Internal variables:

*Internal variables

*Bash internal variables at a glance

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*BASHPID

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Table Of Contents

0Getting started

1Using trap to react to signals and system events

4Jobs and processes

6Control structures

10Bash Parameter Expansion

13Here documents and here strings

15Conditional Expressions

16Scripting with parameters

17History substitutions

20Process substitution

21Programmable completion

22Customizing PS1

23Brace Expansion

24Bash Arithmetic

25getopts smart positional-parameter parsing

28Script shebang

29Pattern matching and regular expressions

30Keyboard shortcuts

32Copying with cp

33Internal variables

35Case statement

36Word splitting

38File transfer with scp

40Managing PATH environment variable

41Avoiding date using printf

42Chain of commands and operations

43Type of shells

44true, false and commands

45Color script output cross-platform

46Navigating directories

50Typing variables

51Jobs at specific types

52Associative arrays

53Handling the system prompt

54Creating directories

55File execution sequence

56The cut command

57Bash on Windows 10

59Splitting files

60Global and local variables

61Design Patterns

63Select keyword

64When to use eval

65Networking with bash