BASH “Bourne Again Shell”

• Bash is the name of the UNIX shell, which was also distributed as the shell for the GNU operating system and as the default shell on most Linux distros.
• Bash is also a programming platform and users are enabled to write programs that accept input and produce output using shell commands in shell scripts.

Free Websites to learn:

• From Manual Page (Just do on Terminal: man bash)
• Learning Dojo
• Learn Shell
• Beginners Bash
• Intermediate Bash
• All the Operator
• Online GNU Manual
• Guide with Example & Syntex

Learning Platforms:

• Exercism - Bash Track
• Replit - IDE

Online Compiler:

• Rextester
• OneCompiler

Some Insights:

• DASH vs BASH: dash is newer standerd of bash by POSIX & some syntex is different as "function" ketword give error in DASH.
• Shell programming uses other common shells such as sh, csh, tcsh.