Delete line number 10 from file

sed -i '10d' <somefile>
Very useful when the ssh key of a host has changed and ssh refuses to connect to the machine, while giving you the line number that has changed in ~/.ssh/known_hosts.

4
By: raphink
2009-02-16 15:05:29

What Others Think

Thanks for the ssh/known_hosts suggestion... that's good.
bartman · 512 weeks and 3 days ago
To illustate more clearly what I meant : $ ssh somemachine @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that the RSA host key has just been changed. The fingerprint for the RSA key sent by the remote host is 1a:85:69:e1:dc:ce:ce:5c:b7:e3:c5:39:6b:f4:4a:4d. Please contact your system administrator. Add correct host key in /home/raphink/.ssh/known_hosts to get rid of this message. Offending key in /home/raphink/.ssh/known_hosts:560 RSA host key for revu.tauware.de has changed and you have requested strict checking. Host key verification failed. $ sed -i '560d' ~/.ssh/known_hosts
raphink · 512 weeks and 3 days ago
you may need to extend the command for freeBSD or MacOS: sed -i -e '10d' some.file
fourty2 · 415 weeks and 1 day ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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