MacOS

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Time Machine

  • To show hidden files
defaults write com.apple.finder AppleShowAllFiles TRUE
killall Finder
  • To allow Remote disc feature on non-Air Macs
defaults write com.apple.NetworkBrowser EnableODiskBrowsing -bool true
defaults write com.apple.NetworkBrowser ODSSupported -bool true
sudo reboot
  • To change Computer name
scutil --set HostName servername.example.com
scutil --set ComputerName servername
scutil --set LocalHostName servername
  • To check what is preventing MacBook to go to sleep
pmset -g assertions

In my case it was a stuck job in a printer queue: 

Listed by owning process:
  pid 19: [0x0000012c00000013] PreventSystemSleep named: "org.cups.cupsd"
  • To make Ctrl_L & ALT_L combination work in X11
cat > ~/.Xmodmap  << EOF
clear Mod1
keycode 66 = Alt_L
keycode 69 = Alt_R
add Mod1 = Alt_L
add Mod1 = Alt_R
EOF
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