Summary #2 - Network and System Administration(NSA)

let's continue....


Desktop Familiarization

Linux desktop
1) Text Mode (6 consoles CTRL-ALT-F1[6]
2) GUI Mode CTRL-ALT-F7 
->GNOME(default desktop)
->KDE
switchdesk command - change desktop environment


partitioning-divide single hd into many logical drives
partition-contiguous set of blocks treated as independent disk


why multiple partitions?
reduce system failure


partition fields
1)device-partition's device name
2)start-sector where partition begins
3)end-sector where partition ends
4)size-partition's size(MB)
5)type-partition's type(ext2,ext3,vfat)
6)mount point-location within directory hierarchy where volume exists


filesystem type
ext2 — supports standard Unix file types (regular files, directories, symbolic links, etc).
ext3 — based on the ext2 filesystem with journaling- reduces time spent recovering a filesystem after a crash-no need to fsck the filesystem.
swap — support virtual memory. data is written to a swap partition when not enough RAM to store the data your system is processing.
vfat — compatible with Windows 95/NT long filenames on the FAT filesystem. 


IDE Disk Partitions
/dev/hda (Primary Master Disk)
/dev/hda1 (First Primary Partition)
/dev/hda2 (Second Primary Partition)
/dev/hdb (Primary Slave Partition)
/dev/hdb1
/dev/hdc (Secondary Master/Slave Partition)
/dev/hdc1
SCSI Disk Partitions
/dev/sda1, /dev/sda2
/dev/sdb1, /dev/sdb2
/dev/sdc1, /dev/sdc2


Software RAID (Redundant Array of Inexpensive Disk)
RAID 0 (Striping)
RAID 1 (Mirroring)
RAID 5 (Striping with Parity)
LVM (Logical Volume Manager)

Boot Loader

to load OS- BIOS  looks for instructions on the first sector of hd.

first sector of the hd resides master boot record (MBR)-boot loader is initialized .

additional files may be stored and read from a partition

Ai no ōku,
fanilzekazuyama

Summary #1 - Network and System Administration(NSA)

Since i'm taking 2 subjects only for this semester, i've decided to post a summary of what i've learnt in class. It will be easier for me to revise back before quizzes or exams. Hopefully it works coz when i was taking PMIT (Project Management in IT) during short semester, i always updated my blog (onestepclosertomygoal.blogspot.com) after each topic we learned. So.....I'm just hoping for the best since this is my final semester....I'll try my best. Here is the first summary.

UNIX

-multi-user, multi-tasking OS

-can have many users logged in simultaneously, each running many programs

-kernel-keep each process & user separate, regulate access to sys hardware (cpu,memory, disk, i/o)

Linux

-free Unix-type OS

-created by Linus Trovalds

-developed under GNU GPL

-distros(mandrake,redhat,fedora,suse,debian,ubuntu)

structure of standard directories in Unix/Linux

/bin-tools n other program

/dev-hardware devices

/etc-miscellaneous sys config, starup file,etc

/home-home dir

/lib-library files

/proc-current sys process

/root-superusers home dir

/sbin-sys admin tools/sys binaries

/tmp-temporary files

/usr-user tools n apps

INODE(index Node) table-maintain files and dir info(file-metadat,file permission, UID,GID,size,time stamps,etc)

Access Permission

file,dir apps permission:

permission  action      chmod option

read           view        r/4

write          edit         w/2

execute      execute    x/1

category of users:

u-owner/user

g-group

o-others/all users

view permission

ls -l

change to directory
cd directory1


present working directory
pwd


move to superior directory
cd..


absolute path
cd /home


return to user home directory
cd


make directory
mkdir directory1


remove directory(only if empty)
rmdir directory1


remove directory(everything)
rm -R directory1


copy file(must be in same directory otherwise path must be given)
cp file1 file2


move/rename file(must be in same directory otherwise path must be given)
mv file1 file2


remove file
rm file1


use wildcard(all file begin with h and end with c will be removed)
rm h*c


rm * (remove all file in working directory)


change ownership of file/dir permission
chown fanilze directory1
chown fanilze file1


change group of file/dir permission
chgrp group1 directory1
chgrp group1 file1


change dir/file permission
chmod ### file/dir


eg:
chmod 700 dir1 (only owner will have read, write, execute permission)
chmod ugo+rwx file1 (add owner, group, others permission read, write, execute)


summary pon panjang berjela...hahaha....huhuhu....janji paham....

Ai no ōku,
fanilzekazuyama

Fav songs

Ok..dah lame tak upload video kat blog ni...tetibe rase nak upload...lately aku suke sangat lagu2 kat bawah ni...maybe sebab lyrics die kot...so kalu korang pon same taste ngan aku...hehehe...lagu ni untk korang semua

 

lagu ni best tp honestly aku tak suke tgk lagenda budak setan...sebabnye banyak sangat yang aku rase adengan yang mengarut je....huhu...bukan nak kutuk ke ape tp kebanyakan cite mlayu skang dah takde de moral value...malas nak komen panjang2 yang penting aku suke lagu die....

 

 sebenarnye aku ni bukanlah baik sangat...agak lame jugak la tak dengar lagu2 ala2 nasyid...tapi ade je dengar yang lame2 tu...tak tau sangat perkembangan lagu2 nasyid...tak kisah la lagu english ke ape...kalu orang tak bercerita mmg tak tau la...dulu dengar je nama Maher Zain..tak tau siapa die...tp bile dengar lagu die for the first time mmg terpikat/jatuh cinta laaaa...seriously..mmg lepas tu boleh kata semua lagu die aku download...huhu..i know it's not legal to download kan???mentang2 everything is available on the internet semua main download je...Insya'Allah nak beli cd die buat koleksi...korang semua patut dengar lagu Maher Zain...sangat sedap n lyrics die mmg meaningful....

 

lagu Maher Zain jugak...sangat sedap lyrics die.....jom dengar same2

ps:if y'all wanna listen to these songs, just pause the mixpod cause it is autoplay.

Ai no ōku,

fanilzekazuyama

Quotes of the day RT @GreatestQuotes Great Minds Quotes on Twitter

RT@GreatestQuotes Great Minds Quotes
"It's how you deal with failure that determines how you achieve success." - David Feherty

RT@GreatestQuotes Great Minds Quotes
"A person can succeed at anything for which there is enthusiasm." - Charles M. Schwab

RT@GreatestQuotes Great Minds Quotes
"Quality is never an accident. It is always the result of intelligent effort." - John Ruskin

RT@GreatestQuotes Great Minds Quotes
"Patience, persistence and perspiration make an unbeatable combination for success." - Napoleon Hill

Ai no ōku,
fanilzekazuyama

not in the mood to study

so...so...i did this just for fun

What's Your Color Personality?
True Blue

Nah---this isn't like boo-hoo blue. It's more like cool blue---the truly devoted friend. You're a quick learner---knowledge practically clings to your brain, and you're extra sharp when it comes to science and art. But... your loyalty sometimes gets you taken advantage of because you're so blindly faithful that you won't walk away from a friendship---even if you're the one doing all the work.


don't be jealous ok..most of the characteristics are true...
now i have to continue reading the slides coz i'm happy...(ade kene mengena ke?tak pasal)
daaaaaaaaa


Ai no ōku,
fanilzekazuyama 

 

 

updated on Monday- Alhamdulliah...

preparing for nsa quiz?

urgh.......seriouslly x da mood skang...so maybe mlm ni baru start study k???huhuhu...there's nothing much to read...most of the slides psl RedHat installation je.....then command....I'm sure that the lecturer will ask about the command...it's good if he ask about technical things..
urm....pikir2 nak pegi main squash tak ptg ni????dah 4 hari tak main...maksudnye tak exercise langsung selama 4 hari ni....aduh...berat2...lame2 jadi mls nnt....

Teach Yourself Programming with Java in 24 Hours

This book is really useful for beginners out there because the content is very easy to understand...I bet u guys will understand better than before...I know...I know...Some people told me before that Java is a very difficult language to learn...Seriously you are Wrong!!! Don't give up!!!Java is very easy to learn...This book is perfect for beginners and you'll love JAVA....heeee

Google Search Tips- memudahkan dan mempercepatkan pencarian

Ok. Mungkin ade yang dah tau Google sangat popular...Bile tak tau ape2 anda cuma perlu type http://www.google.com ataupon hanya klik pada ikon dekat browser toolbar..kan???kan?...ni saya saje je nak kongsi ngan anda kerana ia akan memudahkan dan mempercepatkan kerja anda...

1) Mengenalpasti masa

Ada 2 cara iaitu:

time bandar/tempat/country

bandar/tempat/country time

 

Seperti yang anda dapat lihat, google akan memaparkan Current Time, Day. 

ps:the keyword should be in english ok?saya dah test in malay tapi hasilnya tidak tepat.

Random quizzes

Sebenarnye aku agak bosan disebabkan takde kelas seharian....hurm...kelas aku on Monday and Wednesday at 10-11.30am and 3.30-5.30pm, Friday 11am-1pm.... so mmg bosan la kan???so aku pon google la kot ade quizzes yg menarik...hehehehe...let's check out the results.......

What season are you?
You belong in Summer

Energetic, creative, and very curious about the world...You're not going to let anything hold you back, especially a cold day.Whether you're chilling out at the beach or partying all night, you live for the warm weather.

The Three Test
You Are Confident and Dominant
You are a very independent, do it yourself kind of person. You've had to rely on yourself.
You know how to be strong for yourself and the people you love. You have a protective streak.

You sometimes come off as a little assertive. You know what you want, and you're not afraid to go get it.
The only thing you require from people is that they're straight with you. You are ready for the truth.

The Chair Test
You Are Adventurous and Accepting
You're the type of person who can sit all day on a train or plane looking out the window, watching the world pass you by.You are a huge novelty seeker. New things, places, and people inspire you. You give a first impression of being restless. It's true that you need to wander a bit in life to feel centered. You are an armchair traveler. While you do enjoy traveling in real life, when you're not traveling, you're still dreaming about far away places.


The Hand Drawn Heart Test
You Have a Content Heart
Your heart doesn't crave much. It doesn't take much to make your heart happy. You may or may not have found love, but either way, your heart is at peace.If your heart has been broken, you are over it. Your heart has no scars. Your heart is open to anything. You have a lot of love to give to the world.

try urself @ http://www.blogthings.com/whatseasonareyouquiz/

Semoga Atok berada di kalangan orang-orang yang beriman dan dirahmati Allah S.W.T

Alhamdulillah semalam selamat sampai di cheras...Singgah satu malam di rumah su sebelum pulang ke hostel. Jumaat lepas bersamaan dengan 27 Zulhijjah 1431/3hb Disember 2010 atok telah kembali kepada-Nya. Sangat tekejut bila mama call. Masa tu otw nak pegi melaka naik bus lepas abis exam ENSA. Mama cakap jap lagi su datang ambik n trus balik sekali sebbab mama, abah, kaklong, adik,anje,tina,ateh and angah akan balik sekali. Mama cakap dah tak sempat...orang kat sana dah nak kebumikan atok...Sedih gila sebab dah lame tak balik kelantan and dah lame tak jumpe atok...Sebenarnye mmg ada niat nak balik sana dalam mase terdekat tapi nak buat macam mane... Allah lebih sayangkan atok...aku hanya mampu mendoakan semoga atok berada di kalangan orang-orang yang beriman....Ameen.