1BASH_BUILTINS(1) General Commands Manual BASH_BUILTINS(1)
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6 bash, :, ., [, alias, bg, bind, break, builtin, caller, cd, command,
7 compgen, complete, compopt, continue, declare, dirs, disown, echo,
8 enable, eval, exec, exit, export, false, fc, fg, getopts, hash, help,
9 history, jobs, kill, let, local, logout, mapfile, popd, printf, pushd,
10 pwd, read, readonly, return, set, shift, shopt, source, suspend, test,
11 times, trap, true, type, typeset, ulimit, umask, unalias, unset, wait -
12 bash built-in commands, see bash(1)
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15 Unless otherwise noted, each builtin command documented in this section
16 as accepting options preceded by - accepts -- to signify the end of the
17 options. The :, true, false, and test builtins do not accept options
18 and do not treat -- specially. The exit, logout, break, continue, let,
19 and shift builtins accept and process arguments beginning with - with‐
20 out requiring --. Other builtins that accept arguments but are not
21 specified as accepting options interpret arguments beginning with - as
22 invalid options and require -- to prevent this interpretation.
23 : [arguments]
24 No effect; the command does nothing beyond expanding arguments
25 and performing any specified redirections. A zero exit code is
26 returned.
27 . filename [arguments]
29 source filename [arguments]
30 Read and execute commands from filename in the current shell
31 environment and return the exit status of the last command exe‐
32 cuted from filename. If filename does not contain a slash, file
33 names in PATH are used to find the directory containing file‐
34 name. The file searched for in PATH need not be executable.
35 When bash is not in posix mode, the current directory is
36 searched if no file is found in PATH. If the sourcepath option
37 to the shopt builtin command is turned off, the PATH is not
38 searched. If any arguments are supplied, they become the posi‐
39 tional parameters when filename is executed. Otherwise the
40 positional parameters are unchanged. The return status is the
41 status of the last command exited within the script (0 if no
42 commands are executed), and false if filename is not found or
43 cannot be read.
44 alias [-p] [name[=value] ...]
46 Alias with no arguments or with the -p option prints the list of
47 aliases in the form alias name=value on standard output. When
48 arguments are supplied, an alias is defined for each name whose
49 value is given. A trailing space in value causes the next word
50 to be checked for alias substitution when the alias is expanded.
51 For each name in the argument list for which no value is sup‐
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