Studio 60

The show reminds me of Saturday Night Live. Good show, actors and plot. Another great show written by Aaron Sorkin.

MAC Screenshot Command

1. command+shift+3 // Full Screenshot


2. command+shift+4 // Crosshair to allow selection of screenshot area


3. command+shif+4(then spacebar) // Camera to capture specific screen object. Similar to Digital Camera

Chelsea Piers GYM (Pier 60)

Almost 3 years ago I stopped going to GYM and slowly gained weight. After some consideration I choose Chelsea Piers that is located 15 min walk from my work. I am planning to go to the gym at least 3 times per week (morning hours before work).

The gym would cost me $55 per paycheck.

I woke up at 5:45AM today and exercise for 45 minutes. I feel better and refreshed.

Import CSV file into MYSQL

LOAD DATA INFILE 'myfile' INTO TABLE table FIELDS TERMINATED BY ',';

Usage of cat command

cat command functionality:
1. create
2. view
3. join files

cat is short for catenate (to join things together, end-to-end)
- Create file
cat > file1
 enter text
 more text
# press Enter, CTRL-d to exit

- View file(s)
cat -n filename # will number all lines
cat -b filename # will number all non-blank lines

cat -t filename # all tabs to be shown as ^I
cat -s filename # remove extra blank lines. 1 blank line is allowed.
cat -A filename # combine -t & -s options together

- Join Files
cat test1 test2 # join both files and show output in stdout
cat test1 test2 > test # Join both files and add to stdout

Bash Shortcuts

GNU Readline Library enable to edit the command line shortcuts. Readline uses emacs key binding. It means a lot of CTRL/ALT keys.

Ctrl+C # Interrupt to exit, terminate the command
Ctrl+D # disconnect from shell
Ctrl+Z # suspend the process, suspend/stop the command
Ctrl+l # clear screen
Ctrl+s # stops the output to the screen
Ctrl+q # allow output to the screen
(If previously stopped using Ctrl+s)
!! - run last command
Ctrl+r # search the history backwards
Ctrl+g # escape from history searching mode
Ctrl+a # go to start of the command line
Ctrl+e # go to end of the command line
Ctrl+f # move forward one character (identical to VIM)
Ctrl+b # move backward one character (identical to VIM)
Ctrl+p # previous command in history
Ctrl+n # next command in history

kill processes that match grep pattern

I open about 20 copies of the same file. I used the command below to kill them.
kill -9 `ps auwwwx | grep "vim /tmp/continuous_migration.log" | awk '{print $2}' | xargs

diff

diff from_file to_file
diff from_dir to_dir

diff useful lags
-B (Ignore changes whose lines are all blank.)
-b (Ignore changes in the amount of white space)
-y (side by side ouput comparison)

useful alias:
diff -Bb alias

Changing Linux Login Shell

Ways to change Linux shell
1. chsh (change login shell)
2. edit /etc/password
3. exec in .login file

how to delete file which name start with minus sign?

rm "./-filename"