To get List all of running OpenVZ Virtual machine, run

vzlist

Example

[root@server10 ~]# vzlist
      CTID      NPROC STATUS    IP_ADDR         HOSTNAME
       101         47 running   199.168.108.237 mon1.hostonnet.com
       108        157 running   199.168.108.236 jira.hostonnet.com
       103        258 running   199.168.108.235 bit.hostonnet.com
       104         51 running   199.168.108.238 bamboo.hostonnet.com
[root@server10 ~]# 

To connect to any of the Virtual machines, all you need to do is

vzctl enter CTID

Example

[root@server10 ~]# vzctl enter 103
entered into CT 103
root@bit:/# ll
total 88
drwxr-xr-x  23 root root  4096 Jul 14 06:17 ./
drwxr-xr-x  23 root root  4096 Jul 14 06:17 ../
drwx------   2 root root  4096 Nov 26  2016 .cpt_hardlink_dir_a920e4ddc233afddc9fb53d26c392319/
-rw-r--r--   1 root root     0 Jul 14 06:18 .vzfifo
drwxr-xr-x   2 root root  4096 Jun 18 22:55 bin/
drwxr-xr-x   2 root root  4096 Nov 26  2016 boot/
drwxr-xr-x   5 root root   640 Jul 14 06:17 dev/
drwxr-xr-x  90 root root  4096 Jul 14 06:17 etc/
drwxr-xr-x   2 root root  4096 Nov 26  2016 home/
drwxr-xr-x  12 root root  4096 Jun 18 22:55 lib/
drwxr-xr-x   2 root root  4096 Jun 18 22:55 lib64/
drwx------   2 root root 16384 Nov 26  2016 lost+found/
drwxr-xr-x   2 root root  4096 Nov 26  2016 media/
drwxr-xr-x   2 root root  4096 Nov 26  2016 mnt/
drwxr-xr-x   3 root root  4096 Jun 18 23:13 opt/
dr-xr-xr-x 271 root root     0 Jul 14 06:17 proc/
drwx------   6 root root  4096 Jun 19 08:53 root/
drwxr-xr-x  19 root root   620 Sep 15 00:00 run/
drwxr-xr-x   2 root root  4096 Jun 18 22:55 sbin/
drwxr-xr-x   2 root root  4096 Nov 26  2016 srv/
drwxr-xr-x   7 root root     0 Jul 14 06:17 sys/
drwxrwxrwt  10 root root  4096 Sep 15 07:55 tmp/
drwxr-xr-x  10 root root  4096 Nov 26  2016 usr/
drwxr-xr-x  13 root root  4096 Jun 18 23:14 var/
root@bit:/# 

Now you are inside the VM. You can run all commands or even change root password for direct SSH access.

See OpenVZ