End of Line Matters for Shell Script in CICD Pipeline

End of Line Matters for Shell Script in CICD Pipeline

You may get an error or failed pipeline if the end of line of a shell script file is CRLF (\r\n) not LF (\n) 

LF

CRLF

In VS Code, you may convert the End of Line from CRLF to LF. Or you may change the default setting

Know How to Use the chmod Command on Linux in Two Minutes

1. Understand permissions
1. how to check ($ls -l)
2. file (-)
3. dir (d)
4. read (r)
5. write (w)
6. execute (x)
2. User types
1. user (u)/group (g)/other (o)
3. Understand operations
1. + (add)
2. - (remove)
3. = (set equal)
4. Numerical shorthand
• The digits you can use and what they represent are listed here:
• 0: (000) No permission.
1: (001) Execute permission.
2: (010) Write permission.
3: (011) Write and execute permissions.
4: (100) Read permission.
5: (101) Read and execute permissions.
6: (110) Read and write permissions.
7: (111) Read, write, and execute permissions.
5. Recursive (-R)
• If we had wanted to include files in subdirectories, we could have used the -R (recursive) option.
6. Examples
• $ls -l
• 

  
  
  
  
  
  
• 
  
  
  
• $chmod 777 chmod_test.txt
• 
  
  
  
• $chmod u-x chmod_test.txt
• 
• 
  

How to Change Your Hostname on WSL Ubuntu in Less Than 2 Minutes

How to change your hostname on wsl ubuntu

• Note down your hostname
• Open /etc/wsl.conf or create the same if it does not exist ($vi wsl.conf)
• Add the following lines in /etc/wsl.conf

[network]

hostname = yourHostname

generateHosts = false

• Open /etc/hosts and update

Find all occurences of hostname (e.g. "DESKTOP-ABC222") and replace with the new one (e.g. "yourHostname").

• Close Ubuntu and re-launch

You could open Windows Terminal or Windows PowerShell run wsl --shutdown to shut down the WSL 2 VM and relaunch it.

check it with $echo "$HOSTNAME"

if you need some help with the UNIX commands, please refer to this page https://aufullstackde.blogspot.com/2023/05/basic-unix-commands.html

Enjoy!