# Need command to find missing operating system security patches

**URL:** <https://community.unix.com/t/need-command-to-find-missing-operating-system-security-patches/374188>\
**Category:** AIX\
**Created:** [November 22, 2018, 12:26am UTC](https://community.unix.com/t/need-command-to-find-missing-operating-system-security-patches/374188 "2018-11-22T00:26:36Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Mona\_Khandelwal](https://community.unix.com/letter_avatar/mona_khandelwal/32/6_449c533f586939b6e5f246632a46421f.png) [@Mona\_Khandelwal](https://community.unix.com/u/Mona_Khandelwal)\
**Post date:** [November 22, 2018, 12:26am UTC](https://community.unix.com/t/need-command-to-find-missing-operating-system-security-patches/374188/1 "2018-11-22T00:26:36Z")

</div>

Hi,

Need a command to find out Missing operating system patches for AIX 7.1 or a command to list down all installed patches.

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<div class="post-metadata">

**Author:** ![Neo](https://community.unix.com/user_avatar/community.unix.com/neo/32/22838_2.png) [@Neo](https://community.unix.com/u/Neo)\
**Post date:** [November 22, 2018, 1:03am UTC](https://community.unix.com/t/need-command-to-find-missing-operating-system-security-patches/374188/2 "2018-11-22T01:03:49Z")

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From a very old 2009 post on the Internet:

If you already know the patch you are looking for the syntax for `instfix` is:

```nohighlight
instfix -ik |grep IYXXXXX (or IZXXXXX)

```

Also, from the archives:

Or do you mean missing requisites or filesets, check out:

```nohighlight
lppchk -v

```

Or even,

```nohighlight
oslevel -rl oslevel format

```

But as I said, these are very old command from a 10 year old archive and sorry but I don't have an AIX system to test.

We have a very old set of AIX man pages here but they are only available to the mods since they do not format correctly on Linux server backends.