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Bash builtin command

Autocomplete

Bash command completion (autocomplete), is a built-in bash function.
See man complete or man bash in the 'complete' section.

By default, bash does not autocomplete bash aliases. Here is a feature request filed for it:
http://savannah.gnu.org/support/index.php?108476

/usr/share/bash-completion
/etc/bash_completion.d/

It is said that the zsh shell has a more powerful, flexible command autocompletion implementation than bash.

Not all bash builtin commands have their man page

Sat, 01/23/2016 - 09:24 - augustin

Having man pages for bash builtin commands is convenient.
man echo provides the man page for the bash command 'echo'.

Some/most builtin commands do not have their own man page.
e.g. man read give man 2 read, which is about a c++ library. There is no man page for man 1 read (bash's read).

The official bash documentation is unwieldy.

Currently, my info pages are broken: #5475: The Info node shell builtin commands in Info file /usr/share/info/bash.info does not exist.

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bash: let

Documented in the 'SHELL BUILTIN COMMANDS' section of man bash or here:
http://www.gnu.org/software/bash/manual/html_node/Bash-Builtins.html

#!/bin/bash
loaded="configuration_file"

# The following will not work because the script will try to run the non-existing command 'configuration_file'
# $loaded=1
# However, this works:
let $loaded=1

For an alphanumeric string, use declare:

  # -g makes the variable global.
  declare -g $1=$2

Errors

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