Type the complete command that searches every file below /etc recursively for the string nameserver and prints only the names of the files that contain it, not the matching lines.
LPIC-1 Exam 101-500, objective 103. GNU and Unix commands medium
Machine-checked — no person has signed for it. This question was read against the source cited below by an automated pass, which found no contradiction. That is a weaker claim than it sounds: the same kind of process wrote the question, so it can confirm its own mistake.
Treat it as a good draft rather than as settled fact, and read the source below before you rely on it. It is not used in mock exams here — only questions a person has signed for are.
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
grep -rl nameserver /etcgrep -lr nameserver /etcgrep -r -l nameserver /etcgrep -l -r nameserver /etcgrep -Rl nameserver /etcgrep -lR nameserver /etcgrep -R -l nameserver /etcgrep -l -R nameserver /etcgrep -rl 'nameserver' /etcgrep -lr 'nameserver' /etcgrep -rl "nameserver" /etcgrep -lr "nameserver" /etcgrep -rl nameserver /etc/grep -lr nameserver /etc/grep -Rl nameserver /etc/grep -r -l nameserver /etc/
Case sensitive — Linux is, and grading LS as ls would teach a falsehood.
Why
-r descends into the directory given as the last operand, and -l stops output at the first match in each file and prints the file name instead of the line. The pair is the standard way to find which configuration file mentions a setting. -R behaves like -r but also follows symbolic links it meets during the descent, and -L is the inverse of -l, listing files with no match at all.
Where this comes from
- Cited
- manual page grep(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.
More questions on this objective
- A user starts a new terminal window in a running graphical desktop session, which launches bash as an interactive shell that is NOT a login shell. Which file in the user's home directory does bash read in that case? machine-checked
- In bash, which history expansion re-runs the entire previous command line? machine-checked
- Which bash command prints the literal five characters $USER instead of the current user name? machine-checked
- You want /opt/bin searched for executables, after all the directories already in PATH, in the current bash session and in every command started from it. Which command does that? machine-checked
- There is a passwd manual page in section 1 (the command) and another in section 5 (the /etc/passwd file format). Which command opens the section 5 page? machine-checked
- Select the TWO true statements about shell variables and the environment in bash. machine-checked