what does cd $cwd do?

[nick8967]

What this command does?

Code: Select all

cd $cwd

[B.Goode]

What this command does?

Code: Select all

cd $cwd

(No obvious relationship to the substantive question in the thread in which this was originally posted ... )

From the output of

Code: Select all

man cd

cd - Change the shell working directory

$cwd is an environment variable.

[gkreidl]

Nothing!

It means "change directory to current working directory" but this is where you already are (inside a terminal).

[deepo]

Nothing!

It means "change directory to current working directory" but this is where you already are (inside a terminal).

Not necessarily true.
$cwd is a variable that I guess the OP found in a script somewhere.
If you are logged in as e.g. pi and are currently in the / folder and then type cd $cwd from a terminal, then that will result in a cd command that will change directory to your home directory, because the $cwd variable is empty.

/Mogens

[rpdom]

Nothing!

It means "change directory to current working directory" but this is where you already are (inside a terminal).

Is cwd a shell built-in variable? I know PWD is, but don't think cwd is. Perhaps cwd has been set elsewhere?

[PeterO]

Is cwd a shell built-in variable? I know PWD is, but don't think cwd is. Perhaps cwd has been set elsewhere?

I will admit to having to check as my first thoughts were that $cwd existed though I was suspicious about $cwd vs $CWD,
$PWD does exist (at least on login shells running bash, but neither $cwd or $CWD exist by default, (AFAICT)
PeterO