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How do I flush a computer DNS cache?To flush DNS cache in your computer or PCFlush dns to get a new nameserver resolution for a domain. Flushing DNS cache might also helps you to check new redistered domain is accessable in the browser or not. You can simply flush your… Continue Reading How do I flush a computer DNS cache?

At  times, you will find the following error message in the “/var/log/messages” ======= FAIL: ftp per_source_limit from=xxx.xxx.xxx.xxx ======= You can resolve the issue by adding the following line in the file ‘/etc/xinet.d/ftp_psa’ ======= per_source            = UNLIMITED  ======= After saving the file, restart xinet.d by using the following command. /sbin/service xinetd… Continue Reading FAIL: ftp per_source_limit

At times, you may get many emails notifying about the Dr.Web service. You may disable it by following the steps mentioned below: It differs from one Plesk version to that of the other. For Plesk 8: Edit the file ‘/etc/drweb/drweb32.ini‘ and set UpdateNotify = no For plesk 9: Edit the… Continue Reading Disable Dr.Web email notifications

1. Create a user: useradd testpasswd test 2. Add this user in wheel group. usermod -a -G wheel test 3. Now, Edit PAM configuration file for su. (/etc/pam.d/su) —-  vi /etc/pam.d/su uncomment below line auth sufficient /lib/security/$ISA/pam_wheel.so trust use_uid This will allow users in wheel group as a trusted users.… Continue Reading Wheel user to become as root (su -) without password

unable to enter into VPS You may get an error while entering to a openvz vps. You cant also ssh to the vps from outside. Error: vzctl enter xxxx enter into VE xxxx failed Unable to open pty: No such file or directory 1. If it is a redhat based… Continue Reading Error : Unable to open pty: No such file or directory

How to tune the postfix in your server? The probably the best thing you could do is to write the logs to another syslog server as is done in this syslog.conf snippet. mail.* @xxx.xxx.xxx.xxx or if you can’t spare a machine for that, put dash in front of the filename.… Continue Reading Postfix Tuning and steps to tune the postfix in server

How to upload your files via FTP FileZilla in cPanel? You can upload the file via FTP. Kindly download the FTP client to your local machine and install it. Kindly follow the link below to download the FTP client. ====== http://filezilla-project.org/download.php ====== Then you can upload the files via FTP… Continue Reading Upload file in your account via FTP filezilla in cPanel

Testing Dovecot in Postfix or Verify Dovecot in Postfix One thing that you can do is run this command to verify it is listening on the correct port numbers: netstat -aunt This should show that Dovecot is listening on ports 143 and 110 for IMAP and POP3. Check if Dovecot… Continue Reading Testing Dovecot in Postfix or Verify Dovecot in Postfix

Linux settings for high load systems There are a few basic settings you have to adjust for high load systems to make sure the server have enough resources to handle big number of network connections. The main parameter is a maximum number of opened files allowed for the process to… Continue Reading Linux server settings for high load systems

How to configure email account in Outlook?There are many of us who do not use Outlook for send/receive email. But it is the better option to use Outlook to send and receive emails. Configuring email account in Outlook is easier. Just follow the link below to configure Outlook in your… Continue Reading Configure email account in Outlook or MS Outlook