I have installed a package from source, now I want to upgrade the older version to new version which is available.
How can I upgrade already installed source package on my system?
Ans : This question arises to all the admins who do installation from source package. To upgrade a source package follow the same steps to you have did at the time of first installation through source. Package as shown below..
Step1: unpack … Continue Reading
Archive for the ‘Administration’ Category
This is possible with renaming of the scripts located in running configuration(rc) folders such as /etc/rc1.d, /etc/rc2.d etc. Each of these folders are corresponding to the scripts that will start in that run-level respectively. For example if you want to start some script in runlevel 1, then they should be kept in /etc/rc1.d folder so that when Linux OS is booting up these scripts are executed.
So how can I set priority to my scripts/services?
Just go in to … Continue Reading
Nic bonding is defined as bonding of two or more network cards on a server/pc to form a parallel single connection. This is a great way of achieving redundancy to a server if its having more number of network cards. Its having many names like.
1. Link aggregation
2. Channel Bonding
3. NIC Bonding
4. NIC teaming
5. Network card Bonding
6. Ethernet bonding
7. Trunking
8. Etherchannel
9. Multi-link truning(MLT)
10.Network bonding
11.Network Fault
What is a”Core file” ? Ans : A core file is created when a program is crashed/stoped abnormally due to some bug. This will be huge size which contains all the memory info, crash info which is used for programmers to debug the issue and find a solution or patch to that bug.
Why we system administrators are interested in that core files?
Ans : This is because of their size. As we do … Continue Reading
A “defunct” processes is also known as a “zombie” processes. A Zombie process is referred as dead process which is receding on your system thought its completed executing. In one shot we can say its a dead processes. This process will be in your process table and consuming your memory. Having more defunct process will consume your memory which intern slows your system. We have to kill the defunct process in order to free RAM … Continue Reading
To see all the process run by a perticular user
#ps -u username u
Example
#ps -u rajesh u
or
To see all the files opened by user
#lsof grep username
Example
#lsof grep rajesh
To see memory used by a perticular user
#ps -u username u awk ‘{print $2}’
Example
ps -u krishna u awk ‘{print $2}’
Now you will get all the PID’s run by user Krishna. So try to get memory usage … Continue Reading
