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FreeBSD Tutorials and HowTos

Here you will find tutorial about FreeBSD unix operating system such as – configuration of network, PF firewall/packet filtering, NTA, FreeBSD kernel, building and installing packages, storage, networking services, including HTTP/HTTPS, FTP, NFS, SMB, SMTP, SSH, and NTP ( rss/feed ).

FreeBSD Unix Find Out Which Programs Are Listing On a Given Port Number

I‘m a new FreeBSD Unix system user. How can I find out the process/programs names listing on a certain port on a FreeBSD Unix systems using command line? How do I lookup the process which is currently bound to the given network port on a FreeBSD server?
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Use ssh-copy-id with an OpenSSH Server Listening On a Different Port

My OpenSSH server listening on TCP port number 2222. How can I use ssh-copy-id with an sshd server with listening on a different port on a Linux or Unix-like systems?
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Howto Configure PFSense Site-to-Site IPSec VPN Tunnel For Remote Access

I work from a small office/home office and I need to set up an IPSec site-to-site VPN between a Cisco/OpeNBSD IPSec-enabled gateway and firewall running PFSense. How do I configure the VPN tunnel so that I can access remote subnet and servers behiend a Cisco firewall/router securely? How do I setup a tunnel mode configuration which will provide you with an encrypted site-to-site network, allowing networks at multiple remote locations to be able to securely communicate using my PFSense located in my SOHO?
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FreeBSD Unix Show Mounted File Systems

I recently switched from MS-Windows server to a FreeBSD Unix server. How can I see list of mounted file systems on a FreeBSD based Unix server using command line options?
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Bash: Reissue And Repeat A Long Command Without Retyping It on a Linux, OS X & Unix

I‘m a new Ubuntu Linux user. In Linux, Apple OS X or Unix-like systems, how do I reissue or repeat a long command without retying it?
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FreeBSD Force DHCP Client (dhclient) to Renew IP Address To Get A New Lease

I have a Linux DD-WRT router DHCP server running on my network. How can I force my FreeBSD based dhcp client to get a new lease from this Linux based router? What is the command in FreeBSD equivalent to Windows’ “ipconfig /renew” command?
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How To Stress Test CPU and Memory (VM) On a Linux and Unix With Stress-ng

I want test my Linux, OpenBSD, FreeBSD and Unix-like server entirely for high load and monitoring the health under stress. How can I stress out my CPU, memory, I/O, and disk stress and more with stress test tool on a Linux or Unix-like systems?
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How To Add Swap on FreeBSD Unix Systems

I need additional swap space to improve my FreeBSD Unix server/desktop performance. How do I add a swap file to FreeBSD system using command line options without creating a new partitions? How do I encrypt swap space on a FreeBSD Unix server for security purpose?
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How To PFSense Configure Network Interface As A Bridge / Network Switch

I have Soekris single board communication embedded computers which is optimized for low power and network usage. The server has four Ethernet ports. I’ve installed PFSense firewall on it and configure WAN + LAN ports. How do I setup IPv4 software bridge using PFSense so that the rest of ports act as a network switch?
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How to Run and Execute Command When I Log Out Of Linux Session?

I‘m using CentOS 7 server. I need to run a command when I logout using ssh or bash shell. So in Linux and Unix-like systems, how can I run a command to execute when I log out my session?
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