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32 lines
1.9 KiB
32 lines
1.9 KiB
2 years ago
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#!/bin/sh
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# To make this script executable, use the command: chmod +x 07_permissions.sh
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# To run the script, use the command: ./07_permissions.sh
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echo "This spell will teach you the basics of permissions in POSIX-compliant Bash"
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echo "To study the code of the examples, please use the command: cat 07_permissions.sh"
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# Execution flags
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echo "The chmod command changes the permissions of a file. The permissions can be represented in two ways: octal or symbolic. "
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echo "In octal representation, permissions are represented by a three-digit number, with each digit representing permissions for owner, group and others respectively. In this representation, 7 means read, write and execute permissions, 5 means read and execute permissions, and 0 means no permissions."
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echo "In symbolic representation, permissions are represented by a combination of letters 'ugoa' (user, group, others, all) and '+-' (add or remove) and 'rwx' (read, write, execute) permissions. For example, 'ug+x' means add execute permission for user and group."
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echo "chmod +x script.sh adds the execution flag to a script"
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touch my_script.sh
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chmod +x my_script.sh
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ls -l my_script.sh
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echo "The file my_script.sh now has the execution flag set"
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echo "chmod 755 script.sh adds the execution flag and read and execute permissions for owner, group and others"
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touch my_script2.sh
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chmod 755 my_script2.sh
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ls -l my_script2.sh
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echo "The file my_script2.sh now has the execution flag and read and execute permissions for owner, group and others"
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echo "chmod 700 script.sh adds the execution flag and read, write and execute permissions for owner only"
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touch my_script3.sh
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chmod 700 my_script3.sh
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ls -l my_script3.sh
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echo "The file my_script3.sh now has the execution flag and read, write and execute permissions for owner only"
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echo "You can also use chown to change the ownership of a file."
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echo "chown user:group script.sh changes the owner and group of the script.sh file"
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echo "Spell cast successfully"
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