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Some Issues as Linux Administrator

Posted on 2009-05-08
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Some issues you may have seen in your network as linux administrator and also please outline the steps you had taken to troubleshoot the issues
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Question by:madhurikv
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Expert Comment

by:fosiul01
ID: 24333947
Remember to give them example what they want to listen, in my previoius post, i said, if they want apache, linux mysql, give them example on those basic,

so what your job description ???

what the employer asking ??
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Author Comment

by:madhurikv
ID: 24334009
- Should have minimum of 3 Months exp in Unix/Linux
- Good understanding of Server PC Architecture
- Good working knowledge of Networking


This is the job description I got from the employer....


This is the my resume

"      Administering Windows XP/2003/Linux Operating Systems with a LAN of around 40 Nodes running.
"      Design & implementation of System/Group Policy for the Network
"      Maintain and create user accounts and policies within Active Directory
"      Providing solution to the day-to-day problems of the users.
"      Keep the systems virus free with the help of EPO, McAfee V Shield.
"      Finding solutions and fixes for virus and spyware related issues
"      Verifying and monitoring error logs and resolving issues
"      Configuring and troubleshooting out look express.
"      Monitoring servers and their performance in respect to different attributes.
"      Maintain and apply security and operating system patches and enhancements on servers and pcs
"      Patch Management using WSUS.
"      Maintenance of  Intranet website [IIS].
"      Optimizing systems using various tools
"      Administering system security using tools like Nessus, Snort for vulnerabilities.
"      Implementing Auto monitoring tools to check the health of servers.
"      Configuration of IPTables.
"      Produced system/network documentation and SOPs.
"      Submitting status report on daily as well as weekly basis.


So please post some questions related to my resume as well as opening
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Expert Comment

by:fosiul01
ID: 24334102
Ok so it like windows base admin but they want a linux guy who has minimum of linux expericence ,

then i guess it would be very basic linux base question..

1. how do you change runlevel in linux
2. what command do you use to go system maintanence
3. how do you block all incomming trafiq via iptables but you just want to open some specifiq ip for ssh connection
4. how will you check samba log : /var/log/samba/logfiles
5. how will you set samba to run in runleve 3 or 5
6.what port need to open for samba
6  how will you create a share in samba which would be for a specifiq user only
7  how will you join samba with windows Active directoy, give me some idea  
8 how do you install samba ??
9 where samba configuration file reside in linux ?? how will you edit that file ??
10, how will you set dns server address in linux ??

this is just the basic .. try to get some idea about samba and basic linux question

such as : copy, past, change permisson, create user, delete user ...  since they want only 3 month expericence, so it must be basic


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Author Comment

by:madhurikv
ID: 24334124
Also Please provide answers....I'm more of a windows admin just learning linux and going to try my luck in interview

Please provide answers
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Expert Comment

by:fosiul01
ID: 24334191
how do you change runlevel in linux : From /etc/inittab file , set the defualt to 5 which gui
2. what command do you use to go system maintanence   : boot the server with liux cd then type linux rescue

. how do you block all incomming trafiq via iptables but you just want to open some specifiq ip for ssh connection


iptables -P INPUT DROP  [ which wil block every input]

iptables -A INPUT --source xx.xx.xx.xx -p tcp --dport 22 -j ACCEPT  [ open port for specifiq port]

Check this one for basic iptables rule
http://fosiul.co.uk/KnowledgeCategories.php?CID=71

how will you set samba to run in runleve 3 or 5 :

chkconfig samba on     it will start smaba in every run level but for 3 and 5 you will have to define

what port need to open for samba : 139

how will you create a share in samba which would be for a specifiq user only

in samb.conf file you need to create a share and do following

[accounting]

    comment = Accounting Department Directory

    writable = yes

    valid users = @account  -> so any one is account group will have access
    path = /home/samba/accounting

    create mode = 0660

    directory mode = 0770


 how will you join samba with windows Active directoy, give me some idea  

just read this :http://www.howtoforge.com/samba_ads_security_mode_p2  

you dont have to memorize every thing, just keep note of basic steps and the main command

net ads join -Uadministrator%password



where samba configuration file reside in linux ?? how will you edit that file ?? : if its redhat  /etc/samba/smb.conf

we normaly edit by vi or nano editor


10, how will you set dns server address in linux ??  /etc/resolv.conf

......
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Expert Comment

by:fosiul01
ID: 24334237
mainly
what ever they ask, give them example

if they say, how will you do that ....

start of with, " i had similier type of problme exame one day.. this happen... then tell them how to solved ,

my interview luck is not that good!! still waiting to hear from one employer!! hope will get that job!!

and good luck to you aswell
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Author Comment

by:madhurikv
ID: 24334578
Thanks any other questions and some basic issues
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LVL 29

Expert Comment

by:fosiul01
ID: 24334652
any one can ask you so many questions ... but since they ask only for 3 month exp so they are not want some one too much knowledge!!!

anyway

lear about ,

route command, how to test network activity, how to change default gatewy, how to define Ip in linux

what stores in /etc/

how are you monitoring your network ?? example nagios,

learn some basic command as i said, cp, mv, sudo, tar ,

they might ask how will you do backup of files in linux server  [ tar command ]
by the way
how much experience do you have in linux ?? when is your interview ??
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Accepted Solution

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fosiul01 earned 500 total points
ID: 24335304
also read this one

http://us5.samba.org/samba/docs/man/Samba-HOWTO-Collection/diagnosis.html

the basic technique to trobleshoot samba
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