PROTOCOLS PORT NUMBERS

PORT NUMBERS

1. ICMP PORT NO. 1
2. SSH PORT NO. 22
3. FTP PORT NO. 21
4. SFTP PORT NO. 115
5. TELNET PORT NO. 23
6. TELNETS PORT NO. 992
7. SMTP PORT NO. 25
8. HTTP PORT NO. 80
9. HTTPS PORT NO. 443
10. POP3 PORT NO. 110
11. POP3S PORT NO. 995
12. IMAP PORT NO. 143
13. IMPAS PORT NO. 993
14. LDAP PORT NO. 389
15. LDAPS PORT NO. 636
16. NNTP PORT NO. 119
17. SNMP PORT NO. 161
18. NFS PORT NO. 2049
19. IPP PORT NO. 631

MySelf Prakash Singh Chaudhary

My Self in the Office

JUDGE YOUR NAME

A-- You can be very quiet when you have something on your mind.
B-- You are always cautious when it comes to meeting new people.
C-- You definitely have a partier side in you, don't be shy to show it.
D-- You have trouble trusting people.
E --You are a very exciting person.
F --Everyone loves you.
G-- You have excellent ways of viewing people.
H --You are not judgmental.
I --You are always smiling and making others smile.
J-- Jealously
K-- You like to try new things.
L --Love is something you deeply believe in.
M-- Success comes easily to you.
N-- You like to work, but you always want a break.
O-- You are very open-minded.
P --You are very friendly and understanding.
Q --You are a hypocrite.
R-- You are a social butterfly.
S-- You are very broad-minded.
T-- You have an attitude, a big one.
U-- You feel like you have to equal up to people's standards.
V --You have a very good physique and looks.
W -- You like privacy.
X-- You never let people tell you what to do.
Y-- You cause a lot of trouble.
Z --You're always fighting with someone.

Difference between GRUB and LILO ?

GRUB:-GRAND UNIFIED BOOT LOADER
LILO:-LINUX LOADER

The differences between GRUB & LILO are

1. LILO has no interactive command interface, whereas GRUB have.
2. LILO does not support booting from a network, whereas GRUB supports.
3. LILO stores information about the location of the os it can load physically on the MBR. If you change your LILO config file, you have to rewrite the LILO stage one boot loader to the MBR.
4. LILO works by loading itself into a space that will fit on the MBR. Grub has two stages It loads stage 1 off the MBR (usually) and stage 2 out of /boot, along with it’s config.
   

Differences between RHEL 4 & RHEL 5

New in RHEL 5

1. Installation codes has been added installation and to unlock access to specific functionality like virtualization and clustering.
2. Virtual machines can be created with the virtualization option, which is based on Xen.
3. Kdump can be enabled to capture dump files during system crashes.
4. YUM has replaced up2date, both the command and graphical application
5. SELinux is enabled by default.

How to telnet a linux pc as a root

To telnet a linux pc as a root foollow these instructions

By default it will not allow you telnet as a root

1. open this file /etc/securetty by typing the command vi /etc/securetty
2. write pts/0
3. pts/1
4. save and exit

thats it

CRACK REDHAT LINUX PASSWORD

To crack linux password follow these steps

1. start your pc
2. now press "e" button of the keyboard (keep on pressing it)
3. now you will see three lines ; go to the middle one and at last of this line write 1 and press enter
4. now press "b" to boot
5. now your system will boot in single user mode
6. now you are in the single user mode just type passwd command and press enter
7. now assign any password you like
8. thats it now write init 5 or init 3 to boot into the normal mode.

How to solve grub error in redhat linux

1. first insert cd no. 1 of linux
2.type linux rescue
3.follow the screen instructions
4.write chroot /mnt/sysimage
4.type df -h

it will show you information like either hda2 or hdb or hdc or sda and so on

5.now type grub-install /dev/hda

you will see no errors reported
6. now type exit
7 again type exit
thats it