Linux Shell Scripting Basics — Free Linux Tutorial
Learn Linux Shell Scripting Basics in Linux with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
TL;DR: Learn Linux Shell Scripting Basics in Linux with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
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Linux Shell Scripting Basics in Linux
A shell script is a text file containing shell commands executed sequentially. Scripts start with #!/bin/bash (shebang), declaring the interpreter. Variables store values: NAME="value". Use $\{NAME\} to access them. Conditionals (if/else) control flow. Loops (for, while) repeat actions. Scripts must have execute permission (chmod +x script.sh) to run directly. This enables automation—backups, deployments, batch processing—without typing commands repeatedly.
Example: #!/bin/bash\necho "Hello $\{name\}"\nfor i in 1 2 3; do echo "Count: $\${i}"; done. if [ -f file.txt ]; then processes file conditionally. [ $\${var\} -eq 5 ] tests equality. Scripts can accept arguments ($1, $2, $3...). Learning scripting transforms you from a shell user to a system automation expert.
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