Workbook¶
The Lym Workbook is an effort to create a small lab environment for the students to learn various commands from book. It uses Vagrant to create a new Virtual Machine (VM) on which you can practice commands, try out different solutions and solve these problem without having to worry about messing up your computer. We will slowly add more problems to it.
How to use this workbook?¶
Installation¶
You will need latest Vagrant for this. Install Vagrant following the steps from the website. On Windows you can use VirtualBox along with Vagrant.
Getting the code¶
Checkout latest workbook code from github.
git clone https://github.com/kushaldas/lymworkbook
cd lymworkbook
vagrant up
vagrant ssh workbook
The vagrant up command will create two vms.
Note
In case you manged to delete some configuration inside of the VM(s), you can very easily start from scratch. vagrant destroy will remove both the VMs, and vagrant up again will get them back. You can also destroy one particular VM, vagrant destroy workbook.
Setting up environment¶
Each problem here has a unique “string” which can be used to setup this new machine’s environment according to that problem’s specification, e.g., for setting up environment for a problem with string unicorn, you should do:
sudo lymsetup unicorn
After running the commands and making the changes mentioned in the problem statement, you should run the following to verify that the changes are as per the problem requirements:
sudo lymverify unicorn
copy paste¶
ID string: copypaste
- Create a directory called work in your home directory.
- Copy the file /tmp/problem1/work/files/hello.txt into this newly created directory.
- Remember to remove the /tmp/problem1/work/files/hello.txt file afterwards.
- Create a file named /tmp/chapter1/allusers and add all of the directory names under your home directory into that file.
Note
To setup the problem environment, run:
sudo lymsetup copypaste
After performing the steps, verify the result using:
sudo lymverify copypaste
Find your user id¶
Find your user id and write it down in a file /tmp/myuserid.txt.
Creating softlinks¶
To setup the problem environment:
sudo lymsetup softlinks
Create a softlink called docs in your home directory which will point to /usr/share/doc/ directory. Also create another softlink called memory to the /proc/meminfo file.
To verify:
sudo lymverify softlinks
Basic vim usage¶
To setup the problem environment:
sudo lymsetup basicvim
Read the file at /etc/os-release and write the value of ID_LIKE (without the double quotes) in a file at /tmp/id_like.txt.
To verify:
sudo lymverify basicvim
Adding a new user¶
To setup the problem environment:
sudo lymsetup newuser
Add a new user called fatima to the system.
To verify:
sudo lymverify newuser
Deleting an existing user¶
To setup the problem environment, remember to add the user first from the previous problem.
sudo lymsetup deleteuser
Remove the fatima user from the system.
To verify:
sudo lymverify deleteuser
Finding the IP address of dgplug.org¶
Find the IP address of dgplug.org and save it to /tmp/ip_dgplug.txt file.
To verify:
sudo lymverify findip
Change the local timezone of the system¶
Change the timezone of the system to the same of San Francisco, USA.
To verify:
sudo lymverify timezonechange
Add sudo access to an user¶
Grant administrative(sudo) privileges to an existing normal user account “lym”. Remember to create the user first.
To verify:
sudo lymverify assignsudo
