On Thu, Feb 21, 2008 at 6:19 PM, dinesh jadhav
<din_jadhav2003@ yahoo.co. in> wrote:
Hi.
I don't have access to a unix box at the moment, so I might be wrong
with the scripts.
> 1.
> How do you take a single line of input from the user in a shell script?
read variable_name
> 2.
> Write a script to convert all DOS style backslashes to UNIX style slashes in
> a list of files.
sed 's#\#/#'g
put that in a for loop that with ls.
> 3.
> Write a regular expression (or sed script) to replace all occurrences of the
> letter 'f', followed by any number of characters, followed by the letter
> 'a', followed by one or more numeric characters, followed by the letter 'n',
> and replace what's found with the string "UNIX".
>>sed '/f*a[0-9]n/ UNIX/g'
sed 's/f*a[0-9]n/UNIX/g'
> 4.
> Write a script to list all the differences between two directories.
[ -e /dir1/$file ] && [ ! -e /dir2/$file ] && echo "$file exists in
the first dir only."
> 5.
> Write a program in any language you choose, to reverse a file.
tac file_name (heheh that was easy)
> 6.
> What are the fields of the password file?
dont remember
> 7.
> What does a plus at the beginning of a line in the password file signify?
The user authenticates via NIS.
> 8.
> Using the man pages, find the correct ioctl to send console output to an
> arbitrary pty.
apropos ioctl
man some_number ioctl
> 9.
> What is an MX record?
Mail exchange record...tells an MUA which host to forward a domain's mails to.
> 10.
> What is the prom command on a Sun that shows the SCSI devices?
prom? I know prtconf does it.
> 11.
> What is the factory default SCSI target for /dev/sd0?
/dev/sd0 on Linux??
> 12.
> Where is that value controlled?
??
> 13.
> What happens to a child process that dies and has no parent process to wait
> for it and what's bad about this?
Zombie. Hogs memory.
http://www-1.ibm.com/support/docview.wss?rs=0&uid=swg21085739
> 14.
> What's wrong with sendmail? What would you fix?
Whats right with it? Its an open relay by default.
> 15.
> What command do you run to check file system consistency?
fsck -a[y]
> 16.
> What's wrong with running shutdown on a network?
You lose your session if ssh/telnet is not configured to start at boot.
> 17.
> What can be wrong with setuid scripts?
executes with user's permissions.
> 18.
> What value does spawn return?
man spawn
> 19.
> Write a script to send mail from three other machines on the network to root
> at the machine you're on. Use a 'here doc', but include in the mail message
> the name of the machine the mail is sent from and the disk utilization
> statistics on each machine?
mail [EMAIL PROTECTED] -s "Disk Utilization" << EOF
` df -kh'
EOF
> 20.
> Why can't root just cd to someone's home directory and run a program called
> a.out sitting there by typing "a.out", and why is this good?
path
> 21.
> What is the difference between UDP and TCP?
if TCP packet fails to reach, it is resent. Not UDP.
> 22.
> What is DNS?
domainname to ip resolution.
> 23.
> What does nslookup do?
some things less than what dig does.
> 24.
> How do you create a swapfile?
dd
swapon
> 25.
> How would you check the route table on a workstation/ server?
route -n
> 26.
> How do you find which ypmaster you are bound to?
dont remember
> 27.
> How do you fix a problem where a printer will cutoff anything over 1MB?
dont know.
> 28.
> What is the largest file system size in solaris? SunOS?
dont know. Is in TB.
> 29.
> What are the different RAID levels?
1 2 3 4 5, plus combinations.
> 30.
> Advantages/disadvan tages of script vs compiled program.
script: easy to debug, but runs slowly.
> 31.
> Name a replacement for PHP/Perl/MySQL/ Linux/Apache and show main
> differences.
PHP:ASP
Perl: Ruby, but no proper replacement actually.
MySQL: Oracle.
Linux: No replacement.
Apache: SunONE, MS IIS,.....
> 32.
> Why have you choosen such a combination of products?
Right and tight integration.
> 33.
> Differences between two last MySQL versions. Which one would you choose and
> when/why?
dont know. MySql has been taken over by Sun.
> 34.
> Main differences between Apache 1.x and 2.x. Why is 2.x not so popular?
> Which one would you choose and when/why?
> 35.
> Which Linux distros do you have experience with?
Most.
> 36.
> Which distro you prefer? Why?
Any.
> 37.
> Which tool would you use to update Debian / Slackware / RedHat / Mandrake /
> SuSE ?
apt,up2date, yast,
up2date no longer present in rhel use yum
> 38.
> You're asked to write an Apache module. What would you do?
Download it. ( :P)
> 39.
> Which tool do you prefer for Apache log reports?
webalizer.
or awstars
> 40.
> Your portfolio. (even a PHP guest book may work well)
How about a search software written in perl?
> 41.
> What does 'route' command do?
explained above.
> 42.
> Differences between ipchains and iptables.
stateless and stateful.
> 43.
> What's eth0, ppp0, wlan0, ttyS0, etc.
network and pseudo terminals.
> 44.
> What are different directories in / for?
for storing data. lol1
> 45.
> Partitioning scheme for new webserver. Why?
depends...have a big /www partition with RAID 5.
> 46.
> How do you list all files in a directory, including the hidden files?
ls -al
on suse, just ls -l as root.
> 47.
> How do you find out all processes that are currently running?
ps
ps waux
> 48.
> How do you find out the processes that are currently running or a particular
> user?
ps -el with the -u option or something ( i pipe it to grep user)
> 49.
> How do you kill a process?
killall -9
> 50.
> What would you use to view contents of the file?
cat, pg, more.
> 51.
> How can you gather statistics on a table?
Oracle table?
select * from dba_tablespaces
where table_name=' whatever'
use these views:
dba_segments, dba_extents, dba_free_space
> 52.
> What would you use to edit contents of the file?
vi or emacs.
nano or pico
> 53.
> What would you use to view contents of a large error log file?
more
> 54.
> How do you log in to a remote Linux box?
ssh
> 56.
> How do you get help on a Linux terminal?
man, woman, or just shout "HELP" !!
> 57.
> How do you list contents of a directory including all of its subdirectories,
> providing full details and sorted by modification time?
ls -lRt
> 58.
> How do you create a symbolic link to a file (give some reasons of doing so)?
ln -s file linkname
> 59
> What is a filesystem?
yawn!
http://www.pathname.com/fhs/
> 60.
> How do you get its usage (a filesystem)?
df -HT
df -kh
> 61.
> How do you check the sizes of all users� home directories (one command)?
du -sh /home/*
> 62.
> How do you check for processes started by user 'pat'?
fuser
> 63.
> How do you start a job on background?
&
bg
> 64.
> What utility would you use to replace a string '2001' for '2002' in a text
> file?
discussed above with sed.
> 65.
> What utility would you use to cut off the first column in a text file?
cat filename | cut -d" " -f1
> 66.
> How to copy file into directory?
cp
> 67.
> How to remove directory with files?
rm -fr
> 68.
> What is the difference between internal and external commands?
yawn!
> 69.
> List the three main parts of an operating system command:
dunno.
> 70.
> What is the difference between an argument and an option (or switch)?
dunnno.
> 71.
> What is the purpose of online help?
dunno
> 72.
> Name two forms of security.
dunno.
> 73.
> What command do you type to find help about the command who?
man who
> 74.
> What is the difference between home directory and working directory?
pwd and cd
Okay....bye. ..got some work...will answer the others on Sunday. Happy weekend!
Regards,
--
Nadeem M. Khan | Oracle Database Administrator | Fujitsu Services UAE
| +972-55-9165773
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