unix server

What is the difference between authentication and authorization? Why it is important to understand difference between the two? Authentication vs. Authorization — what are they and how do they differ?


Q. I’ve couple of Linux / Windows server hosted in remote data center? My ISP provides following option for rebooting the box: a) Graceful shutdown command b) An IPMI reboot c) A power strip Which one is the best way to reboot server and why?

{ 1 comment }

Q. How do I set new date and time under OpenBSD UNIX server?


Q. One of my responsibilities is backing up UNIX server. How do I backup data under HP-UX UNIX? How do I use mt, fbackup and frecover commands to perform full and incremental backups?


Q. How do I install and turn on telnet server on Debian Linux VPS Server? A. I don’t recommend using telnet at all on VPS or any other Linux / UNIX server. Telnet transfers all data including passwords in clear text format. It is recommended that you use ssh which is installed by default. Use […]


Q. I’ve HP-UX installed on my HP UX UNIX server. But I’m not able to start or restart the OpenSSH ssh server. How do I stop or restart sshd under HP-UX? A. HP-UX Secure Shell uses Pluggable Authentication Module for password authentication. Server configuration file is located at /opt/ssh/etc/sshd_config. HP-UX SSHD System Startup and Shutdown […]


Q. How do I find out the memory size of my AIX UNIX server? Can you tell us the command name to do the same? A. You need to use bootinfo command to determines and displays various boot information, including boot device type and boot device name. Command to check RAM in AIX UNIX The […]