I am using a minimal Debian system which does not have the top program installed. I tried to install top with sudo apt-get install top, but top is not a package name.
It seems that top is a part of some other package. How can I find out which package I should install to get it? More generally, how can I find the package that contains a program?
The direct answer is procps. Here is how you can find this out for yourself:
# Install apt-file, which allows you to search
# for the package containing a file
sudo apt-get install apt-file
# Update the package/file mapping database
sudo apt-file update
# Search for "top" at the end of a path
apt-file search --regexp '/top$'
The output of the final command should look something like this:
crossfire-maps: /usr/share/games/crossfire/maps/santo_dominion/magara/well/top
crossfire-maps-small: /usr/share/games/crossfire/maps/santo_dominion/magara/well/top
liece: /usr/share/emacs/site-lisp/liece/styles/top
lxpanel: /usr/share/lxpanel/profile/two_panels/panels/top
procps: /usr/bin/top
quilt: /usr/share/quilt/top
You can see that only procps provides an executable in your standard PATH, which gives a clue that it might be the right one. You can also find out more about procps to make sure like it seems like the right one:
$ apt-cache show procps
Package: procps
Version: 1:3.3.3-3
[...]
Description-en: /proc file system utilities
This package provides command line and full screen utilities for browsing
procfs, a "pseudo" file system dynamically generated by the kernel to
provide information about the status of entries in its process table
(such as whether the process is running, stopped, or a "zombie").
.
It contains free, kill, pkill, pgrep, pmap, ps, pwdx, skill, slabtop,
snice, sysctl, tload, top, uptime, vmstat, w, and watch.
--regexp the search goes bananas with the results, as in +10000 results when searching for shortnamed commands, such as dig.
– Fabián
Aug 22 '19 at 01:32
You can search for things with apt-cache search ..., although it is just a match on package names and descriptions, which sometimes is not enough. In that case using, e.g.,
apt-file search top
might work -- it finds all packages that have a file with top in their name, but for this that is a bit zany (it includes setopt, .desktop, etc). To refine this as per Chris's answer:
apt-file search --regexp 'bin/top$'
This will find packages that have a file path ending ('$' is regular expression syntax signifying the end) in bin/top; executables are always in either a bin or sbin directory. When you find what you're looking for:
apt-get install whatever
In this case whatever is apparently procps.
apt-file search takes a literal substring pattern to search for, not a glob. At least on my system, apt-file search "*/top" returns 0 results.
– Chris Down
Mar 23 '15 at 13:31
--regexp and added an explanation that's absent from your otherwise very complete answer ;)
– goldilocks
Mar 23 '15 at 13:40
apt-file search all repos listed in /etc/apt/sources.list and related databases, as long as repo serve a contents-%architecture%.gz.
if believe the file of interest is an executable name "top", use this regex. '^/(usr/)?s?bin/top$'
for the official debian repo, there is a web interface https://packages.debian.org/file:top, there are other search options.
lapswhen it isn't installed triggers the message "The program 'laps' is currently not installed. You can install it by typing:sudo apt-get install epix". Can you add that functionality to your system? – GKFX Mar 23 '15 at 17:28In the following example the command
– ossbuntu Oct 26 '19 at 15:41digis being searched forapt show '*' | grep --regexp '[^A-Za-z]dig[^A-Za-z]' --before-context 30 --after-context 5 --color=always | less --raw-control-chars