nixCraft Linux / UNIX Newsletter

How do I regenerate OpenSSH sshd server host keys stored in /etc/ssh/ssh_host_* files? Can I safely regenerate ssh host keys using remote ssh session as my existing ssh connections shouldn't be interrupted on Debian or Ubuntu Linux? How do I regenerate new ssh server keys? How to regenerate new host keys on a Debian or Ubuntu Linux?

The post How To: Ubuntu / Debian Linux Regenerate OpenSSH Host Keys appeared first on nixCraft.

How do I see all running process in Linux operating systems using command line or GUI options? How can I show all running Processes in Linux operating system?

The post Show All Running Processes in Linux using ps/htop commands appeared first on nixCraft.

The iftop command listens to network traffic on a named network interface, or on the first interface, it can find which looks like an external interface if none is specified, and displays a table of current bandwidth usage by pairs of hosts. The iftop is a perfect tool for remote Linux server over an ssh based session.

The post Linux Display Bandwidth Usage on Network Interface By Host Using iftop command appeared first on nixCraft.

With the help of BASH shell and IF command, it is possible to find out if a file exists or not on the filesystem. A conditional expression (also know as "evaluating expressions") can be used by [[ compound command and the test ([) builtin commands to test file attributes and perform string and arithmetic comparisons.

The post Linux / UNIX: Find Out If File Exists With Conditional Expressions in a Bash Shell appeared first on nixCraft.