IPV6 sometimes break DNS resolution in Ubuntu 18.04. Follow the steps below to disable and verifythat IPV6 is disabled in Ubuntu.Edit /etc/sysctl.conf and add the following lines to the end of the file … Save the file and issue the following command to force Ubuntu to reload the file. To verify that the new configuration…
Allow rrdcached, memcache, and MariaDB/MySQL through the firewall in CentOS 8
Open ports 42217 (rrdcached) and 11211 (memcached) in the firewall and reload the firewall. Verify that the ports are open using firewall-cmd –-list-all.
Wireguard Installation
Use Angristan’s automated WireGuard installation. The install will create a client .conf file in the directory you ran the script. Import the .conf file into your client. Client install files can be downloaded from the Wireguard site. To enable access to your local network while connected through the VPN, add the following two lines to…
Install Gogs on Ubuntu 20.04 with MariaDB
These instructions will install Gogs on an Ubuntu 20.04 server using the MariaDB back-end. Gogs is aself-hosted front-end to Git. Gogs is extremely lightweight and comes in a single binary file. It alsosupports multiple back-end databases including PostgreSQL, MySQL, or SQLite3. These commands assume you are running as root or sudo. All scripts also rely…
Upgrade/Install PHP 7.4 in CentOS 8
The good news is this whole process is relatively painless, so here we go. As always, all the commands assume you have root permissions. First, install the EPEL and remi repositories. List the PHP versions you have available. This should list versions of PHP both in the main repositorys as well as the remi repository….
Useful Linux CLI Commands
crontab -u www-data -e – Edit crontab of user where www-data is the user. rsync -a /dir1/ /dir2/ – Sync two directories. This overwrites files with the same names. stat file.txt – Show information about a file or directory. du -sh directory/ – show file or directory size. zip -r zip_filename.zip directory/ – zip up…
Import certificate for Firepower Remote Access VPN
This guide uses a DigiCert certificate, but any certificate bundle would work. The easiest way to do this is using a PKCS12 file. The certificate CSR, key, and PFX file are generatedin Linux. Save settings as needed. First we need to create a CSR to use with Digicert to issue our certificate in Linux. The…
Monitor or watch an rsync process
… or to see what files the process has opened.
Useful wget examples
This is useful for mirroring directories such as Linux download directories. –recursive – downloads every directory–no-clobber – do not replace files–domains – limit download to a certain domain or sub-domain–R “index.html” – don’t save index.html files
Quick time server set up on HP/Aruba switches
This is a quick configuration of setting a time server on Aruba/HP switches. Enable sntp. Specify how to get to your time server. If your DHCP server specifies an SNTP server in it’s leases, then you didn’t really have to go throughthis. Specify the time server. Replace IP.IP.IP.IP with your server IP. Set the timezone….