"Some" about the box

Thursday, August 20, 2015

Grep with function name (with different colors) recursively

#!/bin/csh

#
# Maximum can be any parameters (if user has given '*' as files)
#
if ( $#argv < 1 ) then
echo "\n[USAGE]: $0 <pattern> <files>\n";
exit
endif

#awk -v re=$1 '/^[[:alpha:]]/{f=FNR"-"$0} $0~re{printf "%s\n%d:%s\n--\n",f,FNR,$0; f="" }' $2
#awk -v re='CANMIC_MX_LOCK' '/^[[:alpha:]]/{f=FNR"-"$0} $0~re{printf "\033[1;31m%s\n\033[34m%d:\033[0m%s\n--\n",f,FNR,$0; f="" "\033[0m" }' *
#awk -v re=$1 '/^[[:alpha:]]/{f=FNR"-"$0} $0~re{printf "\033[1;31m%s\n\033[34m%d:\033[0m%s\n--\n",f,FNR,$0; f="" "\033[0m" }' $2
foreach i (`find . -name "*" -type f -print`)
awk -v re=$1 '/^[[:alpha:]]/{f=FNR"-"$0} $0~re{printf "\033[1;32m[%15s]\t\033[1;31m%-64s\t\033[34m%s\n--\033[0m\n",FILENAME,f,$0; f="" }' $i
end

Output:
[./canmic/canmic_err.c] 53-canmic_state_set(int newstate, int *oldstate) CANMIC_MX_LOCK();
--
[./canmic/canmic_err.c] 77-canmic_stateful_write(char *blkdata, size_t blksize, int blknmbr) CANMIC_MX_LOCK();
--
[./canmic/canmic_err.c] 93-canmic_stateful_dirty(scnMsg_t *scnmsg) CANMIC_MX_LOCK();
--
[./canmic/canmic_err1.h] #define CANMIC_MX_LOCK() do { \
--
[./canmic/canmic_err.h] #define CANMIC_MX_LOCK() do { \

Tuesday, January 6, 2015

Samsung Secret codes to test

*#0*# => To test all the available features in the Samsung phone
*#self# (or *#7353#) ==> To test the sensors and camera

References:
http://www.androidcentral.com/how-uncover-and-use-hidden-service-menu-galaxy-s3

Sunday, October 19, 2014

Hello World Assembly Programming

; Macros used in NASM assembler
%define SYS_EXIT 1
%define SYS_READ 3
%define SYS_WRITE 4
%define STDOUT 1
%define STATUS 0
%define SYS_INTR 0x80

section .data
hello: db 'Hello World!', 10 ;NOTE This 10 is for new line
;hello: db 'Hello World!'
helloLen: equ $-hello ;This will have the length of helloLen
; Note unlike "hello", helloLen is not an address; but value

section .text
global _start

_start:
;Printing Hello World String.
mov eax, SYS_WRITE
mov ebx, STDOUT
mov ecx, hello
mov edx, helloLen
int SYS_INTR

;Exit from main program
mov eax, 1
mov ebx, 0
int SYS_INTR
ret ; This will not get executed at all

Command to Assemble:

nasm -f elf hello.asm

Command to Link:

ld -s -o hello hello.o -m elf_i386 (Note elf_i386 denotes that this needs to be linked for 32 bit application)

Friday, October 10, 2014

DAS, NAS, SAN (FC & ISCSI & FCOE)

LINKS:
http://www.stonefly.com/resources/watch.asp?vid=FCoE-vs-iSCSI,-What%27s-The-Better-Choice-For-You#video

DAS:

SERVER-SERVER:

PHYSICAL: ETHERNET

PROTOCOL: TCPIP

SERVER-STORAGE:

PHYSICAL: SCSI (SATA CARDS)

PROTOCOL: SCSI

CONS:

Free Storage in one server could not be shared with other

NAS:

SERVER-SERVER:

PHYSICAL: ETHERNET

PROTOCOL: TCPIP

SERVER-STORAGE:

PHYSICAL: ETHERNET

PROTOCOL: TCPIP

PROS:
- Centralized Storage
- Sharable
- Data can be accessed as \\12.11.1.2\file_name (means, the server or host knows the storage is not Local)
CONS:
- File Level Transfer, hence slower
- Did support all applications (like mail exchange, database so on)
But now it supports all the applications

SAN (with FC):

SERVER-SERVER:

PHYSICAL: ETHERNET

PROTOCOL: TCPIP

SERVER-STORAGE:

PHYSICAL: Fiber Channel

PROTOCOL: Fiber Channel

PROS:
- Centralized Storage
- Block Level Transfer
- Data can be accessed as D:\ (which means, the server assumes the storage is local BUT IT IS NOT)
CONS:
- High Cost
- New deployment needed server to have HBA (new PCI card)

SAN (with iSCSI):

SERVER-SERVER:

PHYSICAL: ETHERNET

PROTOCOL: TCPIP

SERVER-STORAGE:

PHYSICAL: Ethernet

PROTOCOL: ISCSI (NOT TCPIP; and hence supports BLOCK_TRANSFER)

PROS:
- Centralized Storage
- Block Level Transfer
- No need for HBA
CONS:
- NO CONS IDENTIFIED AS OF NOW (IT IS TAKING OVER FC MARKET)

SAN (with FCOE):

SERVER-SERVER:

PHYSICAL: ETHERNET

PROTOCOL: TCPIP

SERVER-STORAGE:

PHYSICAL: Ethernet

PROTOCOL: Fiber Channel (NOT TCPIP or ISCSI)

PROS:
- Centralized Storage
- Block Level Transfer
CONS:
- FCOE HBA Cards are needed for servers

Monday, May 12, 2014

Screen Command in Linux

screen:
=========
Ctrl-a c Create new window (shell)
Ctrl-a k Kill the current window (could be ctrl+a <shift k>)
Ctrl-a w List all windows (the current window is marked with "*")
Ctrl-a 0-9 Go to a window numbered 0-9
Ctrl-a n Go to the next window
Ctrl-a Ctrl-a Toggle between the current and previous window
Ctrl-a [ Start copy mode
Ctrl-a ] Paste copied text
Ctrl-a ? Help (display a list of commands)
Ctrl-a Ctrl-\ Quit screen
Ctrl-a D (Shift-d) Power detach and logout
Ctrl-a d Detach but keep shell window open
Ctrl-a Esc TO SCROLL THROUGH THE PREVIOUS BUFFERS (V V USEFUL)

References:
http://www.rackaid.com/blog/linux-screen-tutorial-and-how-to/
http://aperiodic.net/screen/quick_reference