Linux Linux help

Linux Performance

1. How do I improve performance of my computer?

There are many tweaks and tricks you can use to improve the performance of your computer besides upgrading the hardware:
a) Remove old files, logs, temporary files and caches.
b) Check and increase disk space to allow system to run.
c) Disable unwanted programs and services that automatically start when you boot your computer.
d) Uninstall unwanted or unused software
e) Do a fresh installation of Linux. You will have no junk left over from multiple installs/uninstalls.
f) Upgrade hardware: faster hard disk, more memory, faster CPU or faster graphics card.

3. Which programs can I disable from running on Startup?

You can view current processes using the System Monitor tool and see which ones are using most CPU and Memory.
You can use the Services administration tool to see what services are running, you can enable or disable them here.
Finally in Control Centre, Startup Applications, you can enable or disable some programs from starting up.
If using the command line, run ps -A to view all running process. You can find most startup services in /etc/init.d/ folder.

Services

4. How do I stop, start or restart services?

Services can be controlled using the following commands:
a) /etc/init.d/command start - will start a service up.
b) /etc/init.d/command stop - will stop a running service.
c) /etc/init.d/command reload - will re-load a running service.
d) /etc/init.d/command restart - will re-start a running service.
e) /etc/init.d/command force-reload - will start a service up.

5. How do I uninstall unwanted software?

To remove a program from your hard disk, open the Software Manager tool, search for the program in question and select Remove.
If the program is installed using the RPM (Redhat Package Manager) use the -e option with name of the package, to uninstall it.
If the program is installed using the DPKG (Debian package manager) then use the -r option to remove the package.
If the program is installed using the apt-get command, use the remove option to uninstall the package.
If the program is manually uninstalled you can run make uninstall to remove it. If not see make -n install to see steps required to manually remove it or look in the install_manifest.txt file.

6. How do I speed up desktop performance?

You can control how the desktop performs through the Control Centre. for example, you can remove the desktop background image (see Appearance), disable show windows content when dragging windows (Desktop settings), and desktop effect can be disabling by disabling compositing (Desktop settings).

7. How do I speed up network performance?

If using wireless network, then a good strong signal strength is needed to ensure data is sent or received at maximum. This all depends on where you place your router relative to your computer. Having thick walls or some other type of electrical devices can reduce the signal strength. The type of card and router can also affect performance, 802.11g is fast but the new 802.11n cards are much faster still!
If you are using wired connections, then make sure your switch or router matches the speed of your network card, having a 1GB network card attached to a 100 or even a 10MBPs swtich will severely affect performance, therefore replace the switch/router to a faster version. You can view or change your network speed and settings using the mii-tool or ethtool commands e.g. mii-tool -v eth0.

8. How do I speed up disk performance?

Hard disk performance can be real bottleneck on some systems. Most PCs will be using SATA (Serial ATA) drives for the operating system. They usually run at 40 to 70MB/sec transfer speeds, and 350 MB/s for burst speeds. Switching to SCSI, SAS type disks can slightly improve speeds but real improvements will be seen on SSD (Solid State Disks) can improve speeds a lot, but with a reduction is disk capactity and more cost.