How to launch and use the Ubuntu task manager

Windows and Mac aren’t the only operating systems providing a task manager. Ubuntu has one too. You can open the 'System Monitor' either via the [Windows] key, the Start menu or the terminal.

If you’re ex­per­i­en­cing issues with your system such as slowing ap­plic­a­tions or computer functions, it’s a good idea to check what’s wrong. On a Mac or Windows, you can simply launch the Mac task manager or launch the Windows task manager to find out what’s affecting per­form­ance. Luckily, there’s a similar function available for Linux users.

While Linux dis­tri­bu­tions with graphical in­ter­faces do not allow for system mon­it­or­ing, Ubuntu does come with a task manager that lets you manage, search, filter and terminate processes if necessary. Depending on the interface, the task managers under Ubuntu may differ.

Though the basic options of the re­spect­ive tools are similar, there are some dif­fer­ences between Ubuntu’s task manager and the Windows equi­val­ent. It starts with the name. In Ubuntu, the task manager is called 'System Monitor'. While the Windows shortcut [Ctrl], [Alt] + [Del] launches the task manager under Windows, using the key com­bin­a­tion in Linux prompts a logout dialogue of the GNOME desktop en­vir­on­ment. Though right-clicking the Start icon launches the context menu under Windows, it doesn’t perform the same action in Ubuntu.

You’ve got different options to launch the task manager under Ubuntu. A single universal solution for Linux doesn’t exist. Different operating systems and in­ter­faces also have different options and processes for system mon­it­or­ing. Below are the options for the most common task managers in Linux Ubuntu.

Accessing the Ubuntu task manager is par­tic­u­larly easy with Unity:

1. Launch the ap­plic­a­tion overview.
2. Type 'system monitor'.
3. Select the program of the same name to open the task manager for Ubuntu.

The path to access the task manager is slightly different under Gnome:

1. Launch the Start menu.
2. Click on 'System'.
3. Launch 'System settings'.
4. Find the Ubuntu task manager under 'System Monitor'.

You can launch the task manager for Ubuntu from the terminal. To do this, use the following command:

To search for the cor­res­pond­ing package type 'gnome-system-monitor'.

In most other systems, the easiest option to launch the task manager is via the terminal using the top command:

You can use various other commands to view and manage in­di­vidu­al processes. However, the easiest option is the top command as described above. Check the cor­res­pond­ing Ubuntu version to find out if commands apply to your system Some helpful commands are:

• ps: Lists current processes and is similar to the top command.
• htop: An al­tern­at­ive to top that needs to be manually installed before use. It has a text interface that is built on top of ncurses. Use the following command to install it:

• glances: Generate and check stat­ist­ics on the in­di­vidu­al ap­plic­a­tions in real time.
• lsof: Displays process data and lists file access.
• vmstat: Detect system overload early on and take the ap­pro­pri­ate coun­ter­meas­ures.

• 'Pro­cesses' lists the ap­plic­a­tions that are currently in use. You can terminate them if necessary.
• 'Re­sources' displays CPU and network usage; it also lists storage capacity and out­sourcing. Sorting by CPU usage is possible.
• 'File Systems' displays the storage al­loc­a­tion of your hard disks and par­ti­tions and the type of in­di­vidu­al file systems.

Most Ubuntu task managers include a search function to filter specific processes. In the options above, you can find the function in the bar at the top below the mag­ni­fy­ing glass icon.

Step 4: You’ve now got several options. To stop the process, select 'Stop'. Other options include 'Pause' (and ac­cord­ingly 'Con­tin­ue'), 'Stall' or 'Change Priority'.