- Hot keys:

  <c-s>        - start stream flow
  <c-s><c-q>   - stop stream flow

- Fix LOC not find:
  
  localedef -i en_US -f UTF-8 en_US.UTF-8

- List of commands you use most often:

  history | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head

- Mount folder/filesystem through SSH:

  sshfs name@server:/path/to/folder /path/to/mount/point

- Display the top ten running processes - sorted by memory usage:

  ps aux | sort -nk +4 | tail    

- Put a console clock in top right corner:

  while sleep 1;do tput sc;tput cup 0 $(($(tput cols)-29));date;tput rc;done&

- Copy your SSH public key on a remote machine for passwordless login:

  ssh-copy-id username@hostname

- Extract tarball from internet without local saving:

  wget -qO - "http://www.tarball.com/tarball.gz" | tar zxvf -

- Benchmark: CPU and Memory Bandwidth:

  python -c "import test.pystone;print(test.pystone.pystones())"
  dd if=/dev/zero of=/dev/null bs=1M count=32768

- Mount a .iso file in UNIX/Linux:

  mount /path/to/file.iso /mnt/cdrom -oloop

- Directly ssh to host B that is only accessible through host A:

  ssh -t hostA ssh hostB

- Download all images from a site:

  wget -r -l1 --no-parent -nH -nd -P/tmp -A".gif,.jpg" http://example.com/images

- Make directory tree:

  mkdir -p work/{d1,d2}/{src,bin,bak}

- find files in a date range:

  find . -type f -newermt "2010-01-01" ! -newermt "2010-06-01"

- Show apps that use internet connection at the moment:

  lsof -P -i -n | cut -f 1 -d " "| uniq | tail -n +2

- Save a file you edited in vim without the needed permissions (no echo):

  :w !sudo tee > /dev/null %

- apt-get upgrade: The following packages have been kept back

  sudo apt-get --with-new-pkgs upgrade

- Bash arguments:

  $0,$1,$2  Positional parameters, passed from command line or function caller
  $*        Creates one argument separated by the $IFS variable
  $@        Expand into separate arguments
  $#        Argument count
  $?        Number of command-line arguments [4] or positional parameters

- Tips:

  man hier           # Show file system hierarchy
  man test           # Show posix sh condition test
  man ascii          # Quick access to the ascii table
  getconf LONG_BIT   # 32 bits or 64 bits ?
  reset              # Salvage a borked terminal
  bind -P            # List all bash shortcuts
  mount | column -t  # Currently mounted filesystems in nice layout
  curl ifconfig.me   # Get your external IP address
  disown -a && exit  # Close shell keeping all subprocess running
  cat /etc/issue     # Display which distro is installed
  lsof -i tcp:80     # Which program is this port belongs to ?
  showkey -a         # Quick access to ASCII code of a key
  CTRL + T           # Check the status of 'dd' in progress (OS X)
  svn diff | view -  # Use vim to get colorful diff output

- Tricks:

  mv filename.{old,new}          # Quickly rename a file
  time read (ctrl-d to stop)     # A very simple and useful stopwatch
  telnet towel.blinkenlights.nl  # Watch Star Wars via telnet
  cp file.txt{,.bak}             # Quickly backup files
  sudo touch /forcefsck          # Run a file system check on your next boot.
  sudo find / -mmin 60 -type f   # Find files modified in the past 60 minutes
  curl wttr.in/beijing           # Nice weather forecast on your shell
  echo ${SSH_CLIENT%% *}         # Get the IP of the host your coming from
  echo $[RANDOM%X+1]             # Random Number Between 1 And X
  bind -x '"\C-l":ls -l'         # Bind a key with a command
  find / -type f -size +500M     # Find all file larger than 500M
  chmod --reference file1 file2  # Makes the permissions the same as file1