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sendmail configuration in RHEL

Posted 11-08-2011 at 03:23 AM by deep27ak
Updated 08-18-2012 at 04:03 AM by deep27ak

For more Linux based tutorials My BLOG

Many times I have seen people complaining about their sendmail configuration.

So here I am going to explain configuration of sendmail on RHEL 5

NOTE: This is a simple configuration but if you want to insert some special permissions and authentications let me know I will try to help with additional info

To start of you need to check for the presence of STARTLS and SASLv2 in your machine
Code:
#sendmail
...
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Old

logrorate - centos 5

Posted 11-05-2011 at 07:40 AM by Sharad Garg

Hi

I have a logfile of my application. I want this file to rotate if its size exeeds 1 MB.

For this I am using `logrorate'. I am running the logrorate manually. S whenever I run logrorate, log file gets rorates. It does not take care whether the file size is less than 1 M or not.

I have defined size 1M in the config file. For reference the content of config file is here -

=======================================================================================...
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Old

allowing commands to continue after parent shell exit

Posted 11-05-2011 at 05:52 AM by neonsignal

Because commands that are started from a shell are child processes, they will normally be terminated when the shell exits.

A command can be run with nohup so that it can continue beyond the life of the parent shell, and output will be directed to the file nohup.out:
Code:
nohup command
Alternatively, if the command is already running (ie in the background), it can be allowed to continue by using disown before closing the shell:
Code:
disown
...
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Old

resetting the root password

Posted 11-05-2011 at 05:36 AM by neonsignal
Updated 11-05-2011 at 05:38 AM by neonsignal

When the root password has been lost, it can be reset as follows.

At the grub menu, select 'e' to edit, and add the parameter 'init=/bin/bash' to the linux line. Then 'ctrl-x' to continue booting. This will start the system into a command shell.

Then remount the filesystem root as writable, so that the password can be changed:
Code:
mount -n -o rw,remount /
Change the password in the usual way, then sync to disk:
Code:
passwd
...
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Old

ubuntu 11.10

Posted 11-04-2011 at 08:09 PM by alucard74

Help I've just upgraded to the latest version of ubuntu 11.10 and have lost dual screen. I am running a dell inspiron 1520 with nvidia graphics card. When I go into display all it tells me is I have an unknown screen and won't search for other monitors or tvs. It was working fine before upgrade, can anyone help?????
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