MySQL service no longer starts after installation of XtraBackup

I wanted to follow this guide in setting up a new node to be added to the cluster.

After installing XtraBackup from apt,

found out that the MySQL service was stopped. Tried running the service again using


service mysql start

but it still won’t start. No error feedback after running the command. I also don’t see any errors being generated in the logs after running the command.

From the logs (I believe after installing XtraBackup):

... clip ...

Is the issue with MySQL service not starting a direct result of installing XtraBackup? Why?

Why did you specify? PXC 5.6 requires Xtrabackup 2.2.x.
See what happens when I try to install this old version on my test debian box:

root@vagrant-debian-wheezy:~# dpkg -l|grep -i perc
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
ii percona-xtrabackup 2.2.5-5027-1.wheezy amd64 Open source backup tool for InnoDB and XtraDB
ii percona-xtradb-cluster-client-5.6 5.6.20-25.7-886.wheezy amd64 Percona XtraDB Cluster database client binaries
ii percona-xtradb-cluster-common-5.6 5.6.20-25.7-886.wheezy amd64 Percona XtraDB Cluster database common files (e.g. /etc/mysql/my.cnf)
ii percona-xtradb-cluster-galera-3.x 3.7.3256.wheezy amd64 Galera components of Percona XtraDB Cluster
ii percona-xtradb-cluster-server-5.6 5.6.20-25.7-886.wheezy amd64 Percona XtraDB Cluster database server binaries

root@vagrant-debian-wheezy:~# apt-get install percona-xtrabackup-21
Reading package lists... Done
Building dependency tree 
Reading state information... Done
The following packages were automatically installed and are no longer required:
lsof percona-xtradb-cluster-client-5.6 percona-xtradb-cluster-common-5.6 percona-xtradb-cluster-galera-3.x rsync socat
Use 'apt-get autoremove' to remove them.
[B]The following packages will be REMOVED:[/B]
percona-xtrabackup percona-xtradb-cluster-server-5.6
The following NEW packages will be installed:
0 upgraded, 1 newly installed, 2 to remove and 41 not upgraded.
Need to get 8,521 kB of archives.
After this operation, 64.8 MB disk space will be freed.
Do you want to continue [Y/n]?

Basically, if I would agree, PXC will be removed. I suggest to read the apt messages more thoroughly in the future.