You can do stress test with stress-ng tool. To install this tool on Almalinux/RHEL: dnf install stress-ng Then you can use this command: stress-ng –vm 1 –vm-bytes 90% –timeout 300s –verbose This command will do a stress test on the RAM (VM) using 90% of the available RAM and will run the test […]
After manually configuring your network settings (static IP, etc..) you’ll have to reload and restart the interface for the changes to take effect. Reload connection profile nmcli connection reload Restart connection nmcli connection up ifname eth0 OR Restart device nmcli device down eth0;nmcli device up eth0 Where eth0 is the device name.
Restart Netowork in RHEL 9/Almalinux 9/RockyLinux 9 with nmcli Read More »
You can route specific subnet via OpenVPN and the rest of the traffic will be routed to the default PC gateway. Note: this is valid on OpenVPN installations on Linux that have been installed using this installation script: https://github.com/angristan/openvpn-install Open OpenVPN server.conf file: /etc/openvpn/server.conf Remove or comment out the following lines: push “dhcp-option DNS
OpenVPN Route Private traffic only (OpenVPN Server on linux) Read More »
You may need to mount a qemu RAW image to your linux system for various reasons. To do so, please follow the next steps: Mounting a raw image file with one partition is pretty straight forward. Assuminug the RAW image file name is VirtualMachineImage.raw and the directory to mount the disk is /mnt
Mount a RAW Qemu Image File to your Linux system Read More »
To allow multple connections with the same profile, add the following to the OpenVPN server.conf file. Usually located at /etc/openvpn/server.conf Add this to the file: duplicate-cn save and exist, then restart openvpn
An updated version of this article is available here: Restart Netowork in RHEL 9/Almalinux 9/RockyLinux 9 with nmcli You can restart the network on RHEL 8 as follows: nmcli networking off; nmcli networking on To restart NetworkManager service sudo systemctl restart NetworkManager To restart an individual network interface, you can use the following (where
After network service restart, ipaliases and cpipv6 should be restarted to retrieve all allocated IPs after system network is restarted. /usr/local/cpanel/scripts/restartsrv ipaliases /usr/local/cpanel/scripts/restartsrv cpipv6
Dedicated IPv6 is removed after network restart (cPanel) Read More »
To make CSF work with OpenVPN, you’ll need to create extra iptable rules. We do that by adding them to csfpre.sh. nano /etc/csf/csfpre.sh If the file does not exist, you can create it. If it already exists, you should append to it. iptables -A FORWARD -m state –state RELATED,ESTABLISHED -j ACCEPT iptables -A FORWARD -s
You can test your linux machine download/upload speed using the following speedtest-cli command:
You can find and replace text on one or multiple file at once using sed RHEL command sed -i ‘s/TEXT-TO-FIND/REPLACE-WITH/g’ filename.txt Find and replace text on multiple files with .txt extention sed -i ‘s/TEXT-TO-FIND/REPLACE-WITH/g’ *.txt Replace TEXT-TO-FIND and REPLACE-WITH with the text you’re looking for and its replacment Example: sed -i ‘s/thursday/friday/g’ weekdays.txt The