Revert "Add ZSH"

This reverts commit 0bcfb83f3e.

Ubuntu/install_steps.md

@@ -1,4 +1,30 @@
 # Install steps for Ubuntu system
 
-# Give sudo privilege to current user
+## Give sudo privilege to current user
 run `sudo visudo` and add user to sudo group 
+
+## Install software can be found in package manager
+run `package_install.sh` 
+
+## Add Chinese language support
+In settings - Region & Language - Manage Installed Languages add Chinese. Then in Input Sources add Chinese (Intelligent Pinyin)
+
+## Install VSCode
+Go to VSCode website and download the .deb file. 
+Then use `sudo dpkg -i` to install, then run `sudo apt -f install` to fix dependencies
+Then install c/c++ and cmake extension in VSCode
+
+## Install chrome
+Download chrome .deb file and use dpkg to install.
+
+## Install zsh and set Oh-My-ZSH
+Change bash to zsh
+Do `chsh -s /usr/bin/zsh $(whoami)`
+Get Oh-My-zsh at
+`wget https://github.com/robbyrussell/oh-my-zsh/raw/master/tools/install.sh -O - | zsh`
+Then apply it
+```
+cp ~/.oh-my-zsh/templates/zshrc.zsh-template ~/.zshrc
+source ~/.zshrc
+```
+Then change theme to `risto` by changing the `~/.zshrc` file `ZSH_THEME` field