Linux – Getting ;5D when hitting ctrl + arrow key in a Terminal on FreeBSD

freebsdlinuxsshterminalUbuntu

On centos I can skip a word by hitting ctrl + arrow (left or right) in a terminal. When I ssh into a FreeBSD box and I try the same pattern I get:

$ tail -f 20120412.log;5D;5D;5D

(each try = ;5D)

Is there a way to fix this? I am using Ubuntu 12.04 + Terminator.

Thanks in advance.

Best Answer

A .inputrc in your home directory will cause ctrl+left to stop working on Ubuntu (for example).

To get everything working, add the following to ~/.inputrc:

# Include system-wide inputrc, which is ignored by default when
# a user has their own .inputrc file.
$include /etc/inputrc

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Ssh – Filtering SSHD Logs

You could do something like this:

tail -f logfile | grep -v "some\.ip\.address\.to\.ignore"

tail -f logfile | grep -v "some\.ip\.address\.to\.ignore.*user-name"

Creating a Custom OpenSSH Shell on Linux

To be pedantic, it won't be ctrl+c, but SIGHUP (closer to ctrl+d) that kills the app.

You can put essentially whatever you want in the user's shell in /etc/passwd. Simply replace the default on the user's passwd line (probably /bin/bash) with another program. That program can be a script, such as /usr/bin/tail_log_file, with these contents, owned by root:root, with umode 0755:

#!/bin/rbash
tail -f /path/to/logfile

You can use some interpreter other than rbash, but it is advisable to use a restricted shell in such cases.

To be extremely pedantic about it, you should add the script's path to /etc/shells, but I usually find it works anyway.

Keep in mind also that the user could potentially put the script in the background, or use some options (ssh username@host bash) and still acquire a shell. If you want to restrict the user in such ways, good filesystem permissions are the only real solution.

Best Answer

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Ssh – Filtering SSHD Logs

Creating a Custom OpenSSH Shell on Linux

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