How to Kill Running Plesk Installer in Linux

Learn how to Kill Running Plesk Installer in Linux, fix the BUSY lock error fast, safely remove lock files, and restart installation without breaking your server. Our 24/7 Plesk Live Support Team is always here to help you.

If you’ve ever tried installing or updating Plesk and hit the dreaded “BUSY: Update operation was locked by another update process” message, you already know how frustrating it can be. The installer refuses to move forward, time is ticking, and your server setup is stuck halfway.

So let’s fix it properly.

This guide explains how to Kill Running Plesk Installer in Linux without damaging your system. No shortcuts, no vague advice, just clear steps that work on real production servers.

Kill Running Plesk Installer in Linux

Why This Error Happens

Plesk allows only one installer process at a time. If an installation crashes, gets disconnected, or runs in the background, it leaves a lock behind. As a result, any new installer attempt fails instantly.

Therefore, before you retry anything, you must stop the active process and remove the lock.

Steps

Connect to Your Server via SSH

First, log in to your Linux server as the root user:

ssh root@your_server_ip

Once connected, you can inspect what’s blocking the installer.

Find the Running Plesk Installer Process

Next, identify the installer process ID (PID). Run:

ps aux | grep install | grep -v grep

This command lists all installer-related processes without showing the grep command itself.

At this point, note down the process ID shown in the output.

Kill the Installer Process Safely

Now, terminate the process using its PID:

kill -9 PROCESS_ID

Replace PROCESS_ID with the actual number you found.

This step force-stops the installer immediately. As a result, the system is freed from the locked state.

This is the most critical part of Kill Running Plesk Installer in Linux, so double-check the PID before killing anything.

Fix Plesk Installer Issues Today

Remove the Installer Lock File

Even after killing the process, the lock file often remains. Therefore, remove it manually:

rm -f /tmp/psa-installer.lock

Without deleting this file, the installer may still think another process is running.

Run the Plesk Installer Again

Now you’re clear to restart the installer:

/usr/local/psa/admin/sbin/autoinstaller

At this stage, the installer should launch normally without any BUSY errors.

That’s exactly how you Kill Running Plesk Installer in Linux the right way.

Optional: One-Click Plesk Installation (Clean Setup)

If you’re setting up a fresh server, one-click installation saves time:

sh <(curl https://autoinstall.plesk.com/one-click-installer || wget -O - https://autoinstall.plesk.com/one-click-installer)

The installation usually completes in about 15 minutes, depending on network speed and OS version.

Once Plesk finishes installing, open your browser and visit:

https://

Linux: root + server root password
Windows: Administrator + server administrator password

Then set your Plesk admin email, password, and license.

Conclusion

Server errors don’t need panic. When handled calmly, they’re predictable and fixable. Knowing how to Kill Running Plesk Installer in Linux gives you control, saves time, and avoids repeated failed installs.