My Tech Notes
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RHEL Subscriptions
To be able to use YUM on an RHEL server you need to register it with the RedHat servers. NB: You can do this with a Developer account, which is free! First register the system # subscription-manager register –auto-attach that enter your username and password. or add –username=<username> –password=<password> onto the end of the above…
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Shell Redirect
Discard the output Sometimes you will need to execute a command, but you don’t want the output displayed on the screen. In such cases, you can discard the output by redirecting it to the file /dev/null − $ command > /dev/null Here command is the name of the command you want to execute. The file…
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Yum groups
# yum groups list # yum groups info “Development Tools” # yum groups install “Server with GUI”
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Setgid
When set on a directory, Setting the setgid permission on a directory (e.g. “chmod g+s”) it causes new files and subdirectories created within it to inherit its group ID, rather than the primary group ID of the user who created the file (the owner ID is never affected, only the group ID).
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Setting up SSH to use key pairs
If you SSH to the same server a lot and don’t want to type the password each time you can configure SSH so you don’t have to. First login to your terminal as normal and run $ ssh-keygen This will ask you the name of the key pair file you want to use. It will…
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SELinux and Ports
Here is an example of how ports are controlled by SELinux. Say that the port that apache uses was changed to 1000 when you start apache you get these errors [root@server01 conf]# systemctl status httpd httpd.service – The Apache HTTP Server Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled) Drop-In: /usr/lib/systemd/system/httpd.service.d └─php-fpm.conf Active: failed (Result: exit-code)…
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SELinux and file contexts
apache root document folder was changed from normal folder to /repos folder attempting to get index.html resutls in an error [root@server01 repos]# curl localhost/index.html Forbidden You don’t have permission to access /index.html on this server. set the correct context on the new folder [root@server01 repos]# semanage fcontext -a -t httpd_sys_content_t “/repos(/.*)?” check the context [root@server01…
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How to manually update Plex in a FreeNAS jail
Pre-Update Steps Login to the servers as root Download the update to the server 1) change to the plexmeduaserver directory root@plex:/ # cd/usr/local/share/plexmediaserver 2) stop the plexmediaserver service root@plex:/usr/local/share/plexmediaserver # service plexmediaserver stopStopping plexmediaserver.Cleaning up leftover child processes. 3) Copy the plex update to the current directory 3) Unzip the Plex update (the exact name…
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Ability Checks
To make an ability check, roll a d20 and add the relevant ability modifier. As with other d20 rolls, apply bonuses and penalties, and compare the total to the DC. If the total equals or exceeds the DC, the ability check is a success—the creature overcomes the Challenge at hand. Otherwise, it’s a failure, which…
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Skip into movies in Conan Exiles
Go to : \Conan Exiles\ConanSandbox\Config\ Open “DefaultGame.ini Look for [/script/movieplayer.movieplayersettings] And set the following (not the – at the start) -StartupMovies=StartupUE4 -StartupMovies=StartupNvidia -StartupMovies=CinematicIntroV2
Got any book recommendations?