bash：获取以给定字符串开头的命令列表

Question

是否可以使用Bash获取以某个字符串开头的命令列表？
我想在键入命令的开始后两次按 来获取打印的内容，例如，将其存储在变量中。

Answer 1

您应该能够使用 compgen 命令，如下所示：

compgen -A builtin [YOUR STRING HERE]

例如，“ compgen -A Builtin l”返回

let 
local 
logout

您可以使用其他关键字代替“ builtin”来获得其他类型的完成。Builtin为您提供Shell内置命令。“文件”为您提供本地文件名等。

下面是操作的列表（从BASH手册页 完整的 ，它使用 compgen ）：

  alias      Alias names.  May also be specified as -a.
  arrayvar   Array variable names.
  binding    Readline key binding names.
  builtin    Names  of  shell builtin commands.  May also be specified as -b.
  command    Command names.  May also be specified as -c.
  directory  Directory names.  May also be specified as  -d.
  disabled   Names of disabled shell builtins.
  enabled    Names of enabled shell builtins.
  export     Names of exported shell variables.  May also be specified as -e.
  file       File names.  May also be specified as -f.
  function   Names of shell functions.
  group      Group names.  May also be specified as -g.
  helptopic  Help topics as accepted by the help builtin.
  hostname   Hostnames, as taken from the file specified by the HOSTFILE shell
                 variable.
  job        Job  names, if job control is active.  May also be specified as
                 -j.
  keyword    Shell reserved words.  May also be specified as -k.
  running    Names  of  running  jobs,  if  job  control  is active.
  service    Service names.  May also be specified as -s.
  setopt     Valid arguments for the -o option  to  the  set builtin.
  shopt      Shell  option  names  as  accepted by the shopt builtin.
  signal     Signal names.
  stopped    Names  of  stopped  jobs,  if  job  control  is active.
  user       User names.  May also be specified as -u.
  variable   Names  of  all  shell  variables.   May also be specified as -v.