/etc/fstab – nixCraft

Ubuntu: /dev/xvda2 should be checked for errors

June 16, 2017in Amazon Cloud Computing, Debian / Ubuntu, Hardware, Linux, Troubleshooting, Ubuntu Linux last updated June 16, 2017

When I log in to my Ubuntu Linux 16.04 LTS AWS cloud server, I get the message on screen: /dev/xvda2 should be checked for errors. I can not run fsck command on /dev/xvda1 because it is mounted. How do I check my disk for error without corrupting data?

How to install GlusterFS with a replicated high availability storage volume on Ubuntu Linux 16.04 LTS

February 27, 2017July 21, 2017in File system, Hardware, High Availability, Linux, Ubuntu Linux last updated July 21, 2017

I want to share my web server DocumentRoot /var/www/html/ across 2 Apache web server. Both of my web servers are behind load balanced reverse proxy powered by Nginx. How do I setup and install GlusterFS (“distributed storage”) which is a scalable network filesystem on Ubuntu Linux 16.04 LTS server?

How to add disk image to KVM virtual machine with virsh command

February 17, 2017February 27, 2017in CentOS, Debian / Ubuntu, Linux, Linux KVM, RedHat and Friends, Suse last updated February 27, 2017

How do I add additional disk storage to a guest operating system to KVM virtual machine with virsh command on Linux operating system?

FreeBSD Unix Show Mounted File Systems

February 2, 2015February 2, 2015in File system, FreeBSD, FreeBSD Jails (VPS), UNIX last updated February 2, 2015

I recently switched from MS-Windows server to a FreeBSD Unix server. How can I see list of mounted file systems on a FreeBSD based Unix server using command line options?

How To Add Swap on FreeBSD Unix Systems

January 27, 2015May 3, 2017in File system, FreeBSD, FreeBSD Jails (VPS), UNIX last updated May 3, 2017

I need additional swap space to improve my FreeBSD Unix server/desktop performance. How do I add a swap file to FreeBSD system using command line options without creating a new partitions? How do I encrypt swap space on a FreeBSD Unix server for security purpose?

Linux: Hide Processes From Other Users

August 21, 2014in Linux, Security, User Management last updated August 21, 2014

I run a multi-user system. Most users access resources using ssh client. How to stop leaking process information to all users on Linux operating systems? How do I prevent users from seeing processes that do not belong to them on a Debian/Ubuntu/RHEL/CentOS Linux server?

Linux Security: Mount /tmp With nodev, nosuid, and noexec Options

December 19, 2012December 19, 2012in Linux last updated December 19, 2012

How do I mount /tmp with nodev, nosuid, and noexec options to increase the security of my Linux based web server? How can I add nodev, nosuid, and noexec options to /dev/shm under Linux operating systems?