tar, gzip, zip, bzip2

If want to make a folder into a file, just tar
tar -cvf XXX.tar XXX (create)
tar -xcf XXX.tar (unpack)

if want to compress, then gzip, zip, or bzip2 a tar file
command to expand is gunzip, unzip, and bunzip2

MAC X11 window and font size change

The most simple way is adding the following new command in the X11-> application -> customize
xterm -geometry 72x34+100+40 -fn *-fixed-*-*-*-20-* &
BTW, use command+optin+A to leave the stupid full screen mode

linux search a file

find ./ -name 'program.c'

matlab string and variable

command "eval", execute string with matlab expression

E.g. read the value of variable c0

i=0;
m=strcat('c',num2str(i)); %m is a string
eval(m); %print out the value of c0

View html from a console

Command "elink"
You can open google by typing "elink www.google.com".

Design compiler for calculating fanin

Start design compile: "dc_shell -tcl_mode"
Run a scripts including a set of commands: "source fanin.tcl"
Command for obtaining fanin: "all_fanin -to icpu_adr_o[31]"
PS:
1. Often the initial libraries are set as
set search_path "/auto/edatools/synopsys/syn/v2006.06-SP4/libraries/syn"
##set TECH_DIR $synopsys_root/libraries/syn
set target_library class.db
set symbol_library class.sdb
set link_library class.db
2. If some of the results are not printed out. Add -verbose option, so "source -verbose fanin.tcl". And add a command line in fanin.tcl
"set collection_result_display_limit 220000" a large number.

Create 2D array in perl

If we want to first create space for an two-dimensional array, we first need to create space for a single row, which will have numCols columns:

for($col = 0; $col < $numCols; $col++) {

push @rowMatrix, “0”;

}

Then we need to create a matrix of these single dimension row matrices:

for($row = 0; $row < $numRows; $row++) {

push @matrix, [ @rowMatrix ];

}

Now we have a two dimensional array filled with 0’s with of size [numRows] x [numCols].