Iden­tify is­sues

APC Australia - - How to Linux -

For­merly known as rkhunter, Ly­nis is one of the most pop­u­lar se­cu­rity au­dit­ing tools for Linux. Al­though favoured by sysad­mins, it’s a must-have tool if you’re run­ning a server or al­low re­mote ac­cess through SSH while its ease of use and sim­plic­ity of op­er­a­tion can also help home users.

Ly­nis will study the con­fig files of the in­stalled ap­pli­ca­tions, re­port user ac­counts with­out pass­words, check fire­wall rules, iden­tify ex­pired SSL cer­tifi­cates and much more. In all, the tool will run hun­dreds of tests on the host ma­chine, but it doesn’t re­quire any ex­tra soft­ware. Rather than au­to­mat­i­cally ad­dress­ing prob­lems, it gen­er­ates a re­port list­ing all the iden­ti­fied is­sues and pro­vides tips on how to har­den the sys­tem more ef­fec­tively.

You can grab the lat­est ver­sion of Ly­nis with git clone github. com/CISOfy/ly­nis, which will fetch the lat­est ver­sion into the ly­nis direc­tory. The tool doesn’t re­quire any in­stal­la­tion, so you can be­gin us­ing it by switch­ing into the ly­nis direc­tory and run­ning the ./ly­nis au­dit sys­tem com­mand.

When run­ning the scan, Ly­nis will out­put the re­sult of ev­ery per­formed test to the screen, but you must in­ter­pret the re­sult your­self and take ap­pro­pri­ate ac­tions.

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