macOS

Keyboard Shortcut

• Rectangle: Move and Resize Window

iTerm 2

Use ⌥ ← and ⌥ → to jump forwards / backwards words

Use ⌥ ← and ⌥→ to jump forwards / backwards words in iTerm 2, on OS X@coderwall

1. set left ⌥ key to act as an escape character
   1. iterm2 > preferences > profile > keys
   2. left ⌥ key > Esc+
2. set ⌥← to jump backwards
   1. Keyboard Shortcut: ⌥←
   2. Action: Send Escape Sequence
   3. Esc+: b
3. ⌥ → as well

Key Repeat

Mac OS hold key down is show special char default, to change to repeat input char.

• Enable Key Repeat

  defaults write NSGlobalDomain ApplePressAndHoldEnabled -bool false

• Disable Key Repeat

  defaults write NSGlobalDomain ApplePressAndHoldEnabled -bool true

• Restart your computer

• Adjust key repeat speed

  1. System Preferences
  2. Keyboard
  3. Key Repeat
  4. Delay Until Repeat

Chinese Input

• McBopomofo: for Old Style Chinese Input like 「ㄅ半」

Path

1. change dir to paths.d

   /etc/paths.d/

1. add path file, name “go”

   #go
   /usr/local/go/bin

1. save file, and restart terminal

System Limit

Kernel

• View

  $sudo sysctl -a

• Adjust

  $sudo sysctl -w kern.maxfiles=1048600
  $sudo sysctl -w kern.maxfilesperproc=1048576

Open Files Limit

• Check ulimit

  ulimit -n

Session

• Adjust ulimit

  ulimit -S -n 1048576

System Wide

• Temporarily

  $sudo sysctl -w fs.file-max=1048576

• Persist
  • Add fs.file-max=1048576 in /etc/sysctl.conf

User Level

• Edit /etc/security/limits.conf

  <domain>    <type>  <item>  <value>
  dinolai     hard    nofile  4096
  dinolai     soft    nofile  1024