Gaurav Masand Telnet sends traffic without encryption and should not be used for remote administration on modern systems. SSH is the standard secure alternative for remote shell access. Connect with SSH Use the username and hostname or IP address of the remote server. Use a different port Only use a custom port if the remote SSH service … Read more
Linux can access remote file systems in several ways. The right method depends on whether you need temporary file copy, interactive browsing, or a mounted network location. Copy files over SSH For one-off file copies, scp or rsync over SSH is usually simpler than mounting a remote filesystem. Mount with SSHFS Unmount it when finished: … Read more
Linux routing decides which gateway and interface should be used to reach another network. Older systems often used the route command; on current Linux systems, ip route is the preferred tool. View the routing table ip route A typical default route might look like default via 10.0.0.1 dev eth0. Add a temporary route sudo ip … Read more
scp copies files between local and remote systems over SSH. Copy a local file to a remote server Copy a remote file to the local machine Copy a directory recursively For newer workflows, rsync is often better for large folders or repeated transfers, but scp is still useful for quick secure copies.
ssh is the standard command-line tool for logging in to a remote Linux or Unix system securely. Basic login Replace user with the remote username and example.com with the server name or IP address. Use a different port Run a remote command This is useful for quick checks without opening a full interactive shell.
A modern note on the legacy Telnet protocol, why it should not be used for remote administration, and safer alternatives such as SSH.
Practical netstat examples for checking listening ports, processes and routing information on Linux.
Quick ipcalc examples for checking subnet, netmask, broadcast and host range details.
A short screen tutorial for keeping shell sessions running after disconnecting.
A “cannot mount root filesystem” or “can’t mount root fs” error usually means the kernel cannot access the root partition during boot. This can happen because of an incorrect root device, missing storage driver, filesystem issue, or bootloader configuration problem. Things to check first Was the disk or partition layout changed recently? Was the kernel … Read more