# MySQL 5.5 on Debian 9 (stretch) can't find libssl1.0.0

**URL:** <https://forums.percona.com/t/mysql-5-5-on-debian-9-stretch-cant-find-libssl1-0-0/7244>\
**Category:** Other MySQL® Questions\
**Created:** [October 16, 2019, 8:32am UTC](https://forums.percona.com/t/mysql-5-5-on-debian-9-stretch-cant-find-libssl1-0-0/7244 "2019-10-16T08:32:21Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![j4nd3r53n](https://avatars.discourse-cdn.com/v4/letter/j/3d9bf3/32.png) [@j4nd3r53n](https://forums.percona.com/u/j4nd3r53n)\
**Post date:** [October 16, 2019, 8:32am UTC](https://forums.percona.com/t/mysql-5-5-on-debian-9-stretch-cant-find-libssl1-0-0/7244/1 "2019-10-16T08:32:21Z")

</div>

I am trying to install MySQL 5.5 (has to be that version, unfortunately) on a freshly installed Debian 9 system, and there is one dependency that I can’t easily fix, it seems:

```auto
dpkg: dependency problems prevent configuration of percona-server-server-5.5:
percona-server-server-5.5 depends on percona-server-client-5.5 (>= 5.5.44-rel37.3-1.jessie); however:
Package percona-server-client-5.5 is not configured yet.
percona-server-server-5.5 depends on libdbd-mysql-perl; however:
Package libdbd-mysql-perl is not installed.
percona-server-server-5.5 depends on libaio1 (>= 0.3.93); however:
Package libaio1 is not installed.
percona-server-server-5.5 depends on libssl1.0.0 (>= 1.0.0); however:
Package libssl1.0.0 is not installed.

```

However, this package is no longer available, apparently:

```auto
root&#64;ip-10-0-1-64:~/mysql# dpkg-query -l 'libssl*'
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-=============================================================-===================================-===================================-================================================================================================================================
un libssl1.0.0 <none> <none> (no description available)
ii libssl1.0.2:amd64 1.0.2s-1~deb9u1 amd64 Secure Sockets Layer toolkit - shared libraries
ii libssl1.1:amd64 1.1.0k-1~deb9u1 amd64 Secure Sockets Layer toolkit - shared libraries

```

Is there a way to fix this?

---

<div class="post-metadata">

**Author:** ![j4nd3r53n](https://avatars.discourse-cdn.com/v4/letter/j/3d9bf3/32.png) [@j4nd3r53n](https://forums.percona.com/u/j4nd3r53n)\
**Post date:** [October 24, 2019, 7:37am UTC](https://forums.percona.com/t/mysql-5-5-on-debian-9-stretch-cant-find-libssl1-0-0/7244/2 "2019-10-24T07:37:21Z")

</div>

The solution to this problem turns out to be to add something extra to the apt source list - this isn’t mentioned in the official documentation, as far as I can see:

```auto
# install percona for mysql 5.5
/usr/bin/wget https://repo.percona.com/apt/percona-release_latest.stretch_all.deb
/usr/bin/dpkg -i *deb
cat > /etc/apt/sources.list.d/percona.list <<!
deb http://repo.percona.com/apt stretch main
deb-src http://repo.percona.com/apt stretch main
!
/usr/bin/apt-get update
DEBIAN_FRONTEND=noninteractive /usr/bin/apt-get -q -y install percona-server-server-5.5
/usr/bin/percona-release enable-only tools release
/usr/bin/apt-get update
DEBIAN_FRONTEND=noninteractive /usr/bin/apt-get -q -y install percona-xtrabackup-24

```