Rhel

This is like a re-post of a question from askubuntu.com. To get to that post, I usually had to google it. So, I’ll post it here so I know where to look for when I need it again. At work, we use WPA2-Enterprise for wireless connection. To create a new connection on my laptop with wlp3s0 as Wifi device, follow this step: # nmcli con add type wifi ifname wlp3s0 con-name work-wifi ssid work-ssid # nmcli con edit id work-wifi nmcli> set ipv4.method auto nmcli> set 802-1x.eap peap nmcli> set 802-1x.phase2-auth mschapv2 nmcli> set 802-1x.identity myusername nmcli> set 802-1x.password mypassword nmcli> set wifi-sec.key-mgmt wpa-eap nmcli> save nmcli> activate That’s it if you know how to do it. ...

It seems that by default, SELinux policy manpage is not available. Here’s how to make it available. First install selinux-policy-devel package Then generate the man page by running: # sepolicy manpage -a -p /usr/share/man/man8<br/> -a : all domains -p : path to store the manpage (by default it’s /tmp) /usr/share/man/man8 – section 8 of manpage is for system admin command Create or update manual page index caches # mandb Benefit # man -k _selinux (or e.g. ”man httpd_selinux“) ...

Early last year I started a blog post about the preparation for Red Hat Certified System Administrator (RHCSA) exam. My intention back then was to have more posts follow suit about the exam topics. Like many things in life, things don’t always go according to plan. That was the only post, but I passed the RHCSA exam. Today, I’m going to start another new post about the preparation for the Red Hat Certified System Engineer (RHCSE) exam. I already booked an exam which is taking place on September 12. The exam is 3.5 hours long and cover a broader range than before. ...

Has MySQL/MariaDB server ever run away from you? If it hasn’t, you’re lucky or you’re likely to use PostgreSQL instead. Today I’m trying to restore a database from backup (database dump) onto a new MariaDB server. This is what happened: # mysql -u db_user -p db4 &lt; db4-4.4.2_02-08-2018.sql Enter password: ERROR 2006 (HY000) at line 354: MySQL server has gone away The database size is 1.7G, and this should not surprised a database administrator. But it did surprise me because: firstly I’m not a db admin, and secondly I had this issue before just a few weeks ago. So here is a blog post to make sure I won’t forget it for the 3rd time. Basically, I just need to increase the max_allowed_packet size from the default 16MB to something bigger. I chose 128MB. ...