Linux command to list all available commands and aliases

command linelinuxterminal

Is there a Linux command that will list all available commands and aliases for this terminal session?

As if you typed 'a' and pressed tab, but for every letter of the alphabet.
Or running 'alias' but also returning commands.

Why? I'd like to run the following and see if a command is available:

ListAllCommands | grep searchstr

Best Answer

You can use the bash(1) built-in compgen

compgen -c will list all the commands you could run.
compgen -a will list all the aliases you could run.
compgen -b will list all the built-ins you could run.
compgen -k will list all the keywords you could run.
compgen -A function will list all the functions you could run.
compgen -A function -abck will list all the above in one go.

Check the man page for other completions you can generate.

To directly answer your question:

compgen -ac | grep searchstr

should do what you want.

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Mysql – How to get a list of user accounts using the command line in MySQL

Use this query:

SELECT User FROM mysql.user;

Which will output a table like this:

+-------+
| User  |
+-------+
| root  |
+-------+
| user2 |
+-------+

As Matthew Scharley points out in the comments on this answer, you can group by the User column if you'd only like to see unique usernames.

C# – Run Command Prompt Commands

this is all you have to do run shell commands from C#

string strCmdText;
strCmdText= "/C copy /b Image1.jpg + Archive.rar Image2.jpg";
System.Diagnostics.Process.Start("CMD.exe",strCmdText);

EDIT:

This is to hide the cmd window.

System.Diagnostics.Process process = new System.Diagnostics.Process();
System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo();
startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
startInfo.FileName = "cmd.exe";
startInfo.Arguments = "/C copy /b Image1.jpg + Archive.rar Image2.jpg";
process.StartInfo = startInfo;
process.Start();

EDIT: 2

Important is that the argument begins with /C otherwise it won't work. How Scott Ferguson said: it "Carries out the command specified by the string and then terminates."

Best Answer

Related Solutions

Mysql – How to get a list of user accounts using the command line in MySQL

C# – Run Command Prompt Commands

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