Wiki source code of Commands
Version 1.2 by Julien Fleury on 2021/01/07 00:32
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| 1 | {{box cssClass="floatinginfobox" title="**Contents**"}} | ||
| 2 | {{toc/}} | ||
| 3 | {{/box}} | ||
| 4 | |||
| 5 | = Useful Linux commands = | ||
| 6 | |||
| 7 | Here is a list of useful commands to be executed on a Linux server (debian). Feel free to contribute by feeding this page with your own tricks and tips. | ||
| 8 | |||
| 9 | == Telnet like == | ||
| 10 | |||
| 11 | It is often required to test if a host[:port] is reachable and access is granted from a server. Best way to execute a telnet like command on a Linux console is to work with special files used to communcate with peripherals. Thus, in order to test tcp port 8000 on server 10.100.100.100, simply try to write in file /dev/tcp/10.100.100.100/8000 and add a return value depending on success or failure | ||
| 12 | |||
| 13 | {{code language="shell"}} | ||
| 14 | echo > /dev/tcp/10.100.100.100/8000 && echo 'up' || echo 'down' | ||
| 15 | -bash: connect: Connection refused | ||
| 16 | -bash: /dev/tcp/10.100.100.100/8000: Connection refused | ||
| 17 | down | ||
| 18 | {{/code}} | ||
| 19 | |||
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