The Daily Awesome Blog Thoughts, stories and ideas.

Shell Primer

Ctrl + C - keyboard interrupt
Ctrl + D - disconnect, close shell

jobs - list of process

Tougle between vi and shell
Ctrl + Z - suspends 
bg - continue process
fg - get back into the

Ctrl +D

  sudo apt-get install gt5
  disk usage
 find / -size +10M -ls

free - free memory

du -h media/ - size of a folder

find . -name ".htaccess" -print

grep -sr 'text' .

Grep a file, show several surrounding lines:
-B num to set how many lines before the match
-A num for the number of lines after the match
grep -B 3 -A 2 foo README.txt

Grep by file type
grep -r -i --include \*.h


strip 3 leading directories
tar -xvf ../dev-store.tar --strip-components=3

ls -l    list files
h - compresses kilobytes

touch filename      creates empty file if not exists, updates last modified date

ls -lh
total 16K
-rw-rw-r-- 1 vlad vlad  762 Sep 17 16:40 hour0.txt

chmod 777 filename      changing permissions
each digit corresponds to user, group, other
r-w-x each has a bit, summup to get a permission #
1-1-1 => 7 (permission to read, write, and execute)
1-1-0 => 6 (permission to read and write)
1-0-0 => 4 (permission to read)

chmod u=rw,g=r,o=r filename
chmod 644 filename

id      list groups that user is part of

history | grep ssh      view shell history

!757    run command from history #757

!757:p  view command from history #757

!!      run last command