At the end of last year, I took a training to prepare for Red Hat Certified System Administrator (RHCSA EX200) exam. Now it’s February and I haven’t taken the exam yet. Even worse, I forgot most of the things I learned during that 3 day training. Well, since I’m being chased to get this exam done ASAP, with a passing grade of course, I think now it’s the best time to start revising the material again. As part as the exam prep, I’m going to post small challenges and solutions. ...

First if you haven’t yet heard about vim-airline plugin, and you’re a Vim user, you really owe it to yourself to check it out. By default vim-airline displays the opening buffers on the top part of the window. So how to navigate between those buffers? Well, according to this, it seems those buffers are for visual only. To navigate between them, we can use :bp for previous buffer, and :bn for next buffer. Alternatively, we can use :ls to list all buffers, then navigate to a particular buffer by running :number (substitute number with an actual number). ...

Before getting into how to change a user’s password on FreeBSD, let’s have a quick revision on how that can be done on a Linux system. As a user we can change the password by typing: $ passwd Changing password for user kenno. Changing password for kenno. Current password: ... Or with a root account, we can change/set the password for another user: # passwd kenno Changing password for user kenno. New password: ... How about a FreeBSD? It should be the same way as how it’s done on Linux right? Right? Well, not quite. ...

After rebooting my FreeBSD 11.0, I wasn’t able to login to Mate desktop manager via SLiM (Login Manager). I spent sometimes to try to fix it, but failed. I’ll try it again later when I have a bit of free time. Here’s a quick note of a work around, so I won’t forget what I’ve done. Disable loading slim on start up by editing /etc/rc.conf and commented out the following line: ...

I love ZFS, but there is something that has annoyed me for quite sometimes – the zpool doesn’t get automatically mounted on boot. To work around this, I had to login as root and run: # zpool import tank to import tank pool before I login with my normal user account. Well, I finally found a solution. This is what’s written on zfsonlinux/zfs WIFI about Fedora specifically: Systemd Update: When upgrading to the zfs-0.6.5.8 release it’s recommended that users manually reset the zfs systemd presets. Failure to do so can result in the pool not automatically importing when the system is rebooted. ...