What is Compgen in Linux?

What is Compgen in Linux?

compgen is a bash built-in command which is used to list all the commands that could be executed in the Linux system. This command could also be used to count the total number of commands present in the terminal or even to look for a command with the specific keyword.

What is the output of the command Compgen C?

The compgen is bash built-in command and it will show all available commands, aliases, and functions for you. This command works under Linux, macOS, *BSD and Unix-like system when Bash shell is installed. This command is intended to be used from within a shell function generating possible completions.

How do I get a list of all commands in Linux?

20 Answers

1. compgen -c will list all the commands you could run.
2. compgen -a will list all the aliases you could run.
3. compgen -b will list all the built-ins you could run.
4. compgen -k will list all the keywords you could run.
5. compgen -A function will list all the functions you could run.

How do you list all commands in Terminal?

Just tap the Tab key twice ( Tab Tab ). You’ll be prompted if you want to see all possible commands. Tap y and you’ll be presented with a list. You can do that same thing for individual commands to see all options for that specific command.

What does Compgen stand for?

COMPGEN

What does the hash command do?

hash command in Linux system is the built-in command of bash which is used to maintain a hash table of recently executed programs. It remembers and shows the program locations. It will give the full pathname of each command name.

How do I display the last line of a text file?

To look at the last few lines of a file, use the tail command. tail works the same way as head: type tail and the filename to see the last 10 lines of that file, or type tail -number filename to see the last number lines of the file. Try using tail to look at the last five lines of your .

What will be the output of command Prompt L P G?

Which is the system prompt?…

How do I see all aliases in Linux?

To list all the aliases defined in the system, open a terminal and type alias . It lists each alias and the command aliased to it.

How do I get a list of commands?

You can open the Command Prompt by pressing ⊞ Win + R to open the Run box and typing cmd . Windows 8 users can also press ⊞ Win + X and select Command Prompt from the menu. Retrieve the list of commands. Type help and press ↵ Enter .

How do I see all executed commands in Linux?

In Linux, there is a very useful command to show you all of the last commands that have been recently used. The command is simply called history, but can also be accessed by looking at your . bash_history in your home folder. By default, the history command will show you the last five hundred commands you have entered.

What is the use of COMPGEN in Linux?

The compgen is bash built-in command and it will show all available commands, aliases, and functions for you. This command works under Linux, macOS, *BSD and Unix-like system when Bash shell is installed. This command is intended to be used from within a shell function generating possible completions.

What are the options for COMPGEN command?

Options for compgen command are the same as complete, except -p and -r. From compgen man page: You can see complete man page here. Show activity on this post. At O’Reilly there is a book ( bash Quick Reference by Arnold Robbins) that also has the hint form compgen options being described at complete.

What is the difference between complete and compgen?

Options for compgen command are the same as complete, except -p and -r. From compgen man page: compgen compgen [option] [word] Generate possible completion matches for word according to the options, which may be any option accepted by the complete builtin with the exception of -p and -r, and write the matches to the standard output.

What are the best Linux distributions for beginners?

1 Lubuntu 2 Linux Lite 3 Xubuntu 4 Bodhi Linux 5 antiX Linux 6 Puppy Linux 7 Tiny Core