Notes

Upgrade to Bash 4 on macOS

upgrading from the old Bash 3.2 on macOS to Bash 4 with Homebrew, adding it to /etc/shells and making it the default shell with chsh.

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Bash Scripting
Bash macOS Homebrew
 1# install Homebrew
 2# /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
 3
 4# install Bash via Homebrew
 5brew update && brew install bash
 6
 7# Add the new shell to the list of allowed (white-listed) shells
 8# sudo bash -c 'echo /usr/local/bin/bash >> /etc/shells'
 9echo "$(brew --prefix)/bin/bash" >> /etc/shells
10
11# Change to the new shell
12chsh -s $(brew --prefix)/bin/bash
  • sudo -i let’s you switch to root user
  • brew --prefix gives you the location of Homebrew install directory (/usr/local by default)
  • cat /etc/shells gives you the list of allowed shells

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