Searching the whole filesystem as an ordinary user buries the results under "Permission denied" notices from directories you cannot read. Type the complete command line that runs `find / -name core` and discards only those notices, leaving the matched paths on the terminal.
LPIC-1 Exam 101-500, objective 103. GNU and Unix commands medium
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Answer
Type the answer.
Accepted answers
find / -name core 2>/dev/nullfind / -name core 2> /dev/nullfind / -name core 2>>/dev/nullfind / -name core 2>> /dev/nullfind / -name 'core' 2>/dev/nullfind / -name 'core' 2> /dev/nullfind / -name "core" 2>/dev/nullfind / -name "core" 2> /dev/null
Case sensitive — Linux is, and grading LS as ls would teach a falsehood.
Why
find reports unreadable directories on standard error, which is a separate descriptor from the matched paths it writes on standard output, so 2> discards the notices while the results stay visible. /dev/null is the null device: everything written to it is thrown away. Redirecting descriptor 1 instead would have the opposite effect, hiding the answers and leaving the noise.
Where this comes from
- Cited
- manual page find(1)
Practise this
Reading one question is not practice. The trainer will draw a short set from objective 103 and space the ones you get wrong.
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