A system administrator needs to display the contents of a script file named backup.sh. To make it easier to discuss with a colleague, the administrator wants to see line numbers for all non-blank lines, while blank lines should be displayed but not numbered. Which of the following commands will accomplish this?
The correct command is cat -b backup.sh. The -b option for the cat command numbers all non-empty output lines, overriding the -n option. The cat -n backup.sh command would number all output lines, including blank ones. The cat -s backup.sh command squeezes multiple adjacent blank lines down to a single blank line but does not add line numbers. The cat -E backup.sh command displays a $ character at the end of each line and does not add line numbers.
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What is the difference between the `cat -b` and `cat -n` options?
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What is the purpose of the `cat -s` option?
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What does the `cat -E` option display, and when might it be useful?
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CompTIA Linux+ XK0-006 (V8)
System Management
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