When I have installed a package using apt
, is there a way to find out by which command(s) I can run the installed program(s)?
For instance, the package httpcode
is not available as httpcode
, and the package description (apt show httpcode
) does not explain how to run it. How could I have found out that it’s run via hc
from the command line?
There are two slightly hacky workarounds I found:
-
Assuming that programs are by default installed in
usr/bin
, I ranls -ltc | head -n 10
to find recenlty touched files there, and indeed I foundhc
. -
Similarly to 1,
dpkg -L httpcode
returns a list of files created by installing the package, which also lists/usr/bin/hc
.
Is there a better solution to this problem that doesn’t hinge upon the intuition of where the program might be stored on disk?
I also found that man httpcode
does open the man page of the program, even though I called it with the package name as argument. Does this always work (if the program provides a manpage)?
Best Answer
The locations of files (executables, man-pages and other stuff) should conform Filesystem Hierarchy Standard as a rule.
Personally I solve this problem with one of four methods:
It is known that executables are placed in the directories declared in
$PATH
environment variable:So one can list all package files with
dpkg --list
(seeman dpkg
for details) and find files in/bin
,/sbin
,/usr/bin
,/usr/sbin
,/usr/games
directories. So we can use the following command:So we can see that
/usr/bin/hc
belongs to this package.List all man-pages:
So we can see that we can use
man hc
.For applications with GUI I run search for
*.desktop
files.In this particular case it will not return anything.
With some complicated proprietary (or bad-packaged) stuff this method transforms to reading
Exec
variable in the*.desktop
file - here Telegram is an example:About
Exec
see Desktop Entry Specification.For not installed package one can visit https://packages.ubuntu.com and use Search package directories here (for all releases or for selected release), then click on list of files link in the right column of the table:
and one will get the file list:
This list may interpreted manually or by using searchbar in the browser.