# Command-not-found package?

**URL:** <https://community.learnlinux.tv/t/command-not-found-package/1315>\
**Category:** Linux on Servers\
**Created:** [January 7, 2022, 12:01pm UTC](https://community.learnlinux.tv/t/command-not-found-package/1315 "2022-01-07T12:01:13Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![hypoiodous](https://community.learnlinux.tv/letter_avatar_proxy/v4/letter/h/f475e1/32.png) [@hypoiodous](https://community.learnlinux.tv/u/hypoiodous)\
**Post date:** [January 7, 2022, 12:01pm UTC](https://community.learnlinux.tv/t/command-not-found-package/1315/1 "2022-01-07T12:01:13Z")

</div>

Hi, happy holidays and wish you all a great 2022!

While doing a routine maintainance on my VPS (Ubuntu Server 20.04) I saw this package was available for update.

```bash
The following packages will be upgraded:
  command-not-found libnss-systemd libpam-systemd libsystemd0 libudev1
  openssh-client openssh-server openssh-sftp-server python3-commandnotfound
  systemd systemd-sysv systemd-timesyncd udev

```

However I could not found any information online about any package called “command-not-found” nor it seemed to be installed in my machine. Although to be fair I only checked if it existed as a command by running `which` and the man pages for it.

Do you guys have any idea what it is and what it does, and also what `python3-commandnotfound` which I assume is somehow related? And how could I upgrade some packages of my choice rather than upgrade all of them listed here? Thanks!

---

<div class="post-metadata">

**Author:** ![Buffy](https://community.learnlinux.tv/user_avatar/community.learnlinux.tv/buffy/32/497_2.png) [@Buffy](https://community.learnlinux.tv/u/Buffy)\
**Post date:** [January 7, 2022, 1:01pm UTC](https://community.learnlinux.tv/t/command-not-found-package/1315/2 "2022-01-07T13:01:52Z")

</div>

It’s for when you either type a command that isn’t installed, or mis-type a command. It tries to figure out, using the package catalog, what command you might have been trying to type and/or what package(s) would provide it.

```auto
$ apt show command-not-found
Package: command-not-found
Version: 20.04.5
Priority: standard
Section: admin
Origin: Ubuntu
Maintainer: Michael Vogt <michael.vogt@ubuntu.com>
Original-Maintainer: Zygmunt Krynicki <zkrynicki@gmail.com>
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 36.9 kB
Depends: python3-commandnotfound (= 20.04.5)
Suggests: snapd
Task: standard
Phased-Update-Percentage: 70
Download-Size: 5,244 B
APT-Manual-Installed: yes
APT-Sources: http://archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
Description: Suggest installation of packages in interactive bash sessions
 This package will install a handler for command_not_found that looks up
 programs not currently installed but available from the repositories.

```

You don’t have to accept the list; you can copy-paste or just type the ones you want in your `apt get` command.

---

<div class="post-metadata">

**Author:** ![hypoiodous](https://community.learnlinux.tv/letter_avatar_proxy/v4/letter/h/f475e1/32.png) [@hypoiodous](https://community.learnlinux.tv/u/hypoiodous)\
**Post date:** [January 7, 2022, 6:44pm UTC](https://community.learnlinux.tv/t/command-not-found-package/1315/3 "2022-01-07T18:44:41Z")

</div>

Thank you it’s good to know how to check for packages in the future using `apt show`! I’ve only ever used it a few times to check versions not descriptions