Type the complete command line that runs `dmesg` so that its output appears on the terminal and is written to the file boot.log at the same time. Use a pipe and the standard tool for this.
LPIC-1 Exam 101-500, objective 103. GNU and Unix commands medium
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How these questions are written — where each question comes from, what the verification ledger records, and what happens when one is found wrong.
Answer
Type the answer.
Accepted answers
dmesg | tee boot.logdmesg|tee boot.log
Case sensitive — Linux is, and grading LS as ls would teach a falsehood.
Why
tee copies standard input to standard output and to each file named on its command line, which is how you inspect a stream and keep a copy of it. tee -a appends instead of truncating, and `sudo tee` is the usual way to write to a root-owned file from a pipeline, since the redirect in `sudo cmd > /etc/file` is performed by your unprivileged shell.
Where this comes from
- Cited
- LPI exam objective 103.4
- What it says
- Use tee to send a stream to a file and onward through a pipeline.
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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