How to change MTA on Centos5.6 – RHEL based server

05. March 2012 SysAdmin 0
Here you can see, how to change MTA qmail to any other you can set as simple sendmail or postfix, exim or qmail. `[[email protected]~]#ll /etc/alternatives/mta` lrwxrwxrwx 1 root root 23 Aug 31 03:39 /etc/alternatives/mta -> /var/qmail/bin/sendmail [[email protected] ~]# alternatives –config mta There are 4 programs which provide ‘mta’. Selection Command ———————————————– *+ 1 /var/qmail/bin/sendmail 2 ...

AWS – How to setup an IAM user to access only one s3 Bucket

05. March 2012 SysAdmin 0
Hi, This will explain how you can create an IAM user in AWS, so that you can grant access to only one S3 bucket. – Create an S3 bucket in AWS account. [![](https://res.cloudinary.com/jobnix/image/upload/v1415999956/jobin_2012_02_24_01_vche3d.jpg “AWS_create_s3_bucket”)](https://res.cloudinary.com/jobnix/image/upload/v1415999956/jobin_2012_02_24_01_vche3d.jpg) –  Switch to AWS IAM tab – Click Group >> Create Group [![](https://res.cloudinary.com/jobnix/image/upload/v1415999956/jobin_2012_02_24_02_azzusv.jpg “AWS_create_iam_group”)](https://res.cloudinary.com/jobnix/image/upload/v1415999956/jobin_2012_02_24_02_azzusv.jpg) – Enter a Group Name, Click Continue ...

Oops…

01. March 2012 SysAdmin 0
# Error We cannot seem to find what you were looking for. Maybe we can still help you. – You can search our site using the form provided below. – Or you can view some of our recent posts. Search: ### Recent Posts Jobin Josephhttps://nixhive.com/

MySQL Optimization

29. February 2012 SysAdmin 0
Find max connection using the formula:-  memory = keybuffer + (readbuffer + sort buffer ) max connections Open /etc/my.cnf file in your favorite editor (eg: vi, pico etc) max_connections=400 max_user_connections=30 key_buffer=256M (128MB for every 1GB of RAM) myisam_sort_buffer_size=64M join_buffer_size=1M read_buffer_size=1M (1MB for every 1GB of RAM) sort_buffer_size=1M (1MB for every 1GB of RAM) table_cache=1500 thread_concurrency=2 ...

Apache Optimization

29. February 2012 SysAdmin 0
All the important configuration options are stored by Apache in a config file called httpd.conf that is located at /usr/local/apache/conf/httpd.conf. We will start by opening this file in your favorite text editor. For example: – vi /usr/local/apache/conf/httpd.conf **MaxClients** Total number of concurrent connections. Locate it in the configuration file. This should be set to a ...

Apache Optimization

29. February 2012 SysAdmin 0
All the important configuration options are stored by Apache in a config file called httpd.conf that is located at /usr/local/apache/conf/httpd.conf. We will start by opening this file in your favorite text editor. For example: – vi /usr/local/apache/conf/httpd.conf **MaxClients** Total number of concurrent connections. Locate it in the configuration file. This should be set to a ...

Drop Sync/DDOS Attack

29. February 2012 SysAdmin 0
1. Find.. to which IP address in the server is targeted by the ddos attack netstat -plan  | grep  :80 | awk ‘{print $4}’ | cut -d: -f1 |sort |uniq -c 2. Find… from which IPs, the attack is coming netstat -plan  | grep  :80 | awk ‘{print $5}’ | cut -d: -f1 |sort |uniq ...

MySQL – can’t get hostname for your address

29. February 2012 SysAdmin 0
I recently had an issue with mysql, One of our developer complained that he is not able to login to mysql via SqlYog, a MySql client. The **Error Message** was, Can’t get hostname for your address **Solution** ** ** Just add **skip-name-resolve** option to the [mysqld] section of your my.cnf/my.ini `skip-name-resolve ` Jobin Josephhttps://nixhive.com/

Privacy Policy for www.JobNix.in

25. February 2012 SysAdmin 0
If you require any more information or have any questions about our privacy policy, please feel free to contact us by email at [Privacy](mailto:[email protected]). At www.JobNix.in we consider the privacy of our visitors to be extremely important. This privacy policy document describes in detail the types of personal information is collected and recorded by www.JobNix.in ...