[root@test2 etc]# cat sysctl.conf

Question

When i add some entry in
[root@test2 etc]# cat sysctl.conf
reboot the server or restart the file ........new in this need suggestions to make the change permanent.

Answer 1

assuming you are using Linux, hope that answer your question.
Using any text editor, create or edit the /etc/sysctl.conf file, and add or edit lines similar to the following:
Note:
Include lines only for the kernel parameter values that you want to change. For the semaphore parameters (kernel.sem), you must specify all four values. However, if any of the current values are larger than the recommended value, then specify the larger value.
kernel.shmall = 2097152
kernel.shmmax = 2147483648
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
fs.file-max = 65536
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_default = 1048576
net.core.rmem_max = 1048576
net.core.wmem_default = 262144
net.core.wmem_max = 262144
By specifying the values in the /etc/sysctl.conf file, they persist when you restart the system.
On SUSE systems only, enter the following command to ensure that the system reads the /etc/sysctl.conf file when it restarts:
# /sbin/chkconfig boot.sysctl on