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How to Change SSH Port on Linux or Unix
Change SSH port AlmaLinux 8/9 and Rocky Step 1: Choose a New SSH Port The first step in changing the SSH port is to choose a new port number. It is recommended to choose a port number between 1024 and 65535 that is not already in use by another service on the server. For this […]
Continue ReadingHow to Enable SSH Login Notification on Linux CentOS server?
Is your Linux server is used by multiple people on same time? If yes, then add an SSH login notification on your server so you come to know whenever and whom login. It will send you an email when someone login to your account. But for this its must that your server will be able […]
Continue ReadingHow to clear Swap Memory in Linux / CentOS / RHEL
Virtual Memory is called as Swap space in Linux and is used when the physical memory (RAM) is full. When the system needs more memory and the RAM is full, inactive pages in the memory will be moved to the swap space. Swap is not a replacement to physical memory, it is just a small portion on […]
Continue ReadingEnable SSH Login Notification on Linux Ubuntu/Debian
Is your Linux server accessed by multiple users? If so, consider adding an SSH login notification whenever someone logs in. The examples below send an email when someone logs into your server. For this to work, your server must be able to send mail using the mail command. You may follow this tutorial to setup Exim with Gmail if […]
Continue ReadingEnable SSH Login Notification on Linux CentOS
Is your Linux server accessed by multiple users? If so, consider adding an SSH login notification whenever someone logs in. The examples below send an email when someone logs into your server. For this to work, your server must be able to send mail using the mail command. You may follow this tutorial to setup Exim with Gmail if […]
Continue Readinghtaccess file cannot be seen if you access the site via FTP
.htaccess αρχείο δεν μπορεί να δει, αν έχετε πρόσβαση στο site μέσω FTP Symptoms A client has the .htaccess file under the httpdocs directory. This file can be seen in the Plesk file manager, but it is not shown if you access the site via FTP. Cause Files whose names begin with a period (dot) […]
Continue ReadingChanging the SSH Port for Your Linux Server
Changing the SSH Port for Your Linux Server Αλλαγή της θύρας SSH για Linux Server σας You can change the default SSH port for your Linux server as an added security measure. Make sure the new SSH port does not conflict with any known or blocked ports To Change the SSH Port for Your Linux […]
Continue ReadingDisable/Enable ping response on a Linux machine
Disable/Enable ping response on a Linux machine Απενεργοποίηση / Ενεργοποίηση απάντηση ping σε ένα μηχάνημα Linux sysctl is used to modify kernel parameters at runtime, one of these parameter could be ping daemon response, if you want to disable ping reply on your network you just simply need to issue something like: ~# sysctl -w […]
Continue ReadingHow to Secure a CentOS Server SSH DDOS Deflate
About (D)DoS Deflate is a lightweight bash shell script designed to assist in the process of blocking a denial of service attack. It utilizes the command below to create a list of IP addresses connected to the server, along with their total number of connections. It is one of the simplest and easiest to install solutions […]
Continue ReadingΒασικές εντολές του Linux
Βασικές εντολές του Linux (Vasikes Entoles Linux – ssh – Centos) Εντολές διαχείρισης αρχείων ls παρουσίαση των αρχείων ενός φακέλου ls -al προσαρμοσμένη παρουσίαση των αρχείων ενός φακέλου με τα κρυφά αρχεία cd dir αλλαγή του ενεργού φακέλου στο φάκελο dir cd αλλαγή ενεργού φακέλου στο φάκελο home pwd εμφάνιση του ενεργού φακέλου mkdir dir δημιουργία φακέλου με το όνομα […]
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