linux telnel command quit

push the ctrl + ]

change the resolution CentOS in VMware

# vi /etc/grub.conf

go to your kernel

title OS (kernel version)
               root
               kernel /boot/vmlinuz-kernel ~~ quiet vga=code
               initrd


0x333 : 1024x768 16 bits
0x341 : 1024x768 32 bits

0x334 : 1152x864 16bit
0x342 : 1152x864 32bit

0x362 : 1280x720 8 bits
0x363 : 1280x720 16 bits
0x364 : 1280x720 32 bits

0x377 : 1280x768 8 bits
0x378 : 1280x768 16 bits
0x379 : 1280x768 32 bits

0x368 : 1280x800 8 bits
0x369 : 1280x800 16 bits 
0x36A : 1280x800 32 bits

0x335 : 1280x960 16 bits
0x343 : 1280x960 32 bits

0x336 : 1280x1024 16 bits
0x344 : 1280x1024 32 bits

0x34A : 1366x768 8 bits
0x34B : 1366x768 16 bits 
0x34C : 1366x768 32 bits 

0x36B : 1440x900 8 bits
0x36C : 1440x900 16 bits
0x36D : 1440x900 32 bits  

0x337 : 1400x1050 16 bits
0x345 : 1400x1050 32 bits

0x34D : 1680x1050 8 bits
0x34E : 1680x1050 16 bits
0x34F : 1680x1050 32 bits

0x338 : 1600x1200 16 bits
0x346 : 1600x1200 32 bits

0x339 : 1792x1344 16 bits
0x347 : 1792x1344 32 bits

0x33A : 1856x1392 16 bits
0x348 : 1856x1392 32 bits

0x365 : 1920x1080 8 bits
0x366 : 1920x1080 16 bits
0x367 : 1920x1080 32 bits

0x350 : 1920x1200 8 bits
0x351 : 1920x1200 16 bits 
0x352 : 1920x1200 32 bits

0x33B : 1920x1440 16 bits
0x349 : 1920x1440 32 bits

0x353: 2048x1536 8 bits
0x354: 2048x1536 16 bits

0x355: 2048x1536 32 bits 


if u write "vga=ask" when u boot, select the resolution

rotating spiral in matrix by python

X,Y = map(int,raw_input().split(' '))

lis = [[-1 for i in xrange(Y)] for j in xrange(X)]

x,y = 0,0

dx,dy = 0,1

count = 0

while lis[x][y] == -1:

    lis[x][y] = count

    count+=1

    x,y = x+dx,y+dy

    if x in [-1,X] or y in [-1,Y] or lis[x][y] != -1:

        x,y = x-dx,y-dy

        dx,dy = dy,-dx

        x,y = x+dx,y+dy

for L in lis:

    for val in L:

        print '%3d'%val,

    print

>> 6 6

 0   1   2   3   4   5

 19  20  21  22  23   6

 18  31  32  33  24   7

 17  30  35  34  25   8

 16  29  28  27  26   9

 15  14  13  12  11  10

have fun.

c parameter

program 00ff00 0x01

c = number (3)

v = v[0] = program

      v[1] = 00ff00

...