Need to Find the Factors of a Number?

$ factor 2345678992
2345678992: 2 2 2 2 6581 22277

It’s a quick way to find out if a number is prime

$ factor 7867
7867: 7867

WWW Browser for the Terminal Session

$ lynx

Or to read all these tips, with the latest updates

$ lynx http://linux-poison.blogspot.com/

Or, better yet elinks.

$ elinks http://linux-poison.blogspot.com/

You can get elinks at the following site:

http://elinks.or.cz/

How to make a File "immutable" or "unalterable"

Note this works on (ext2/ext3) filesystems.

As root:
# chattr +i filename
And to change it back:
# chattr -i filename
List attributes
# lsattr filename

Solaris: Boot system in single user mode

At Ok, prompt type:
boot –s : To boot system into single mode
boot –a : To boot system step-by-step i.e. interactively

Mount a USB key under Solaris

Insert the USB key in one of the USB slots.

mkdir /rmdisk
/etc/init.d/volmgt stop
/etc/init.d/volmgt start
mount grep rmdisk

It should be there.

If the above doesn’t work please try
/etc/init.d/volmgt stop
iostat -En
Look for your USB device.
mount -F pcfs /dev/dsk/c2t0d0p0:c /mnt
mount -F pcfs /dev/dsk/c1t0d0p0:c /mnt

you are done :)

Solaris root password recovery

Go to the OK Prompt – by pressing Stop +A . Put the 1st Cd for soalris in the cdrom · At OK prompt give the command

# boot cdrom -s

Now mount the boot device onto /a ( To check boot device you can use df command)

#mount /dev/dsk/c0t0d0s0 /a

Now open the password file and remove the password entry i.e. the second field
root:$1$NYDu1c8p$Mdm2n6IPb9k14pP2s2FXZ.:13063:0:99999:7:::

Now unmount the /a mount point #umount /a

Reboot the server in single mode #ok boot -s

Give a new password for root: #passwd
New Password:
Verify Password:

This will reset the password for root and you will be able to login to the box using this password.

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