Category: Linux

Linux Server Managment

Ubuntu Linux Change Hostname (computer name) nixCraft Updated Tutorials/Posts

I am a new Ubuntu Linux laptop user. I setup my computer name to ‘tom’ during installation but now I would like to change the computer name to ‘jerry’.…

pfSense email notification when fallback WAN connection goes down nixCraft

I have two WAN connection. The first WAN connection connects via FTTH modem. The second connection connects via 4G LTE CPE modem. I have configured fallback and load balanced dual WAN connection on my pfSense box.…
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Linux: How can I find a file on my system? nixCraft Updated Tutorials/Posts

I have a remote server located in the data center. I login through SSH command line to manage my Linux server. How do I find a file called xyz on my Linux server system?…
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How To Change Timezone on a CentOS 6 and 7 nixCraft Updated Tutorials/Posts

I set my time zone to ‘America/New_York’ on a CentOS Linux 7 server. I want to see date and time in my timezone in log files.…
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KVM forward ports to guests VM with UFW on Linux nixCraft

My Debian/Ubuntu/CentOS Linux server using KVM as a hypervisor. I would like to forward ports to guests VM with UFW iptables. How do I forward ports on a Linux server running libvirt/KVM to specified ports on VM’s, when using NAT?…
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Helios4 Arm-Based Open Source NAS SBC For Linux/FreeBSD nixCraft

Helios4 is ARM-based open source NAS SBC (Single-board computer) for Linux. This NAS (Network Attached Storage) comes with 4 SATA 3.0 port and comes with ECC memory.…
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Ping using specific gateway interface or source IP address nixCraft

I have multiple gateways configured on my Linux or Unix based router. How do I ping through a specific interface of the gateway? How can I ping using a particular source IP address?Introduction:…
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Linux Find Wireless Wifi Driver Chipset Information nixCraft Updated Tutorials/Posts

How do I find out Wireless driver chipset information under a Linux operating system? How do I get wireless card chipeset information without opening my systems or laptop using a Linux?…
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Linux / UNIX kill unresponsive hung SSH session nixCraft Updated Tutorials/Posts

Sometimes my ssh session stops working because of the internet connection problem. I tried pressing CTRL+Z and CTRL+C to terminate my ssh session but failed to work.…
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How to run command or code in parallel in bash shell under Linux or Unix nixCraft Updated Tutorials/Posts

How do I run commands in parallel in a bash shell script running under Linux or Unix-like operating system? How can I run multiple programs in parallel from a bash script?You…