Understanding open ports is important for managing applications and securing your system. Open ports can allow communication between services, but they can also expose your system to threats. In this guide, we will explain how tocheck open portsandsecure themin Linux using firewall rules and best...
this error message occurs everywhere. You get it when you try to read a file that does not exist, when you try to change to a directory that isn’t there, when you try to write to a file in a directory
On Linux, you can install the Squid proxy server on your machine and configure your network and web browsers with the proxy setting to enjoy the benefits of the proxy server. In this post, we will see how you can install and configure the Squid proxy server on your Linux system. 1. In...
In this tutorial, you will learnhow you can install and configure AutoFS on Linux systems. Prerequisites Before starting, it is important for youtohave sudo privileges on your host. To verify it, simply run the “sudo” command with the “-v” option : if you don’t see any options, y...
Generally, a file system must be mounted on a Linux system to access the contents. When adding a new disk to your system, you may need to use the fdisk command or the parted command to create partitions. Once you have created partitions, you must create
Login to your CentOS 7 server and run the following command on any RHEL based servers to install the package. # yum install openswan lsof Preparing VPN Servers Now we will be interconnecting both networks together, so that the hosts on network One can communicate with hosts on network Two, ...
dnf mark install (Dependency/Package Name) Accidentally uninstalling a package isn't a big deal — just usednf install (package)to reinstall it. Of course, adding and removing packages is only the beginning of running a Linux installation. There area handful of other basic commands that you sh...
This chapter explores basic network applications—the clients and servers running in user space that reside at the application layer. Because this layer is at the top of the stack, close to end users, you may find this material more accessible than the material in Chapter 9. Indeed, you inte...
sudodnfinstalllsof Use lsof Command to List Open Files for a Linux Process Like most Linux commands, the lsof utility is incredibly simple to use. Start by typing the commandlsof: sudolsof Once you run the command above, lsof should return information about the open files in the system. ...
SEE:How to quickly open a terminal in a specific Linux directory Common error messages Failed to start httpd.service. Unit httpd.service not found. This error occurs if the Apache web server package isn’t installed or the service unit file is missing. Install the Apache package using sudo ...