Blog Archives

SSH fingerprints

Whenever we use SSH to connect to a new host, we usually see the following prompt asking us to confirm the fingerprint: $ ssh user1@somedomain.com The authenticity of host ‘somedomain.com’ (99.99.99.101) can’t be establised ECDSA key fingerprint is c8:2c:22:6d:13:…..29:b4:86:8d:13. Are

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Posted in Linux, Security

Network troubleshooting

Here are some basic commands to trouble shoot networking issues: ping ping <hostname> send ICMP ECHO_REQUEST to network hosts ping uses ICMP protocol (ports are only for TCP/UDP) Check to see if a host is reachable from our computer nmap

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Posted in Linux, Networking

Zip commands

zip files zip <archive.zip> <files-to-compress> — unzip archive.zip unzip archive.zip <file.jpg> -t test file -l list files from archive -j do not make directories tar files tar xvf archive.tar Z (compressed) files tar -xZf archive.tar.gz tar -C /tmp/test archive.tar.gz #extra

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Posted in Linux