Text Processing & Editors Flashcards
7 cards from real Linux practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Text Processing & Editors flashcards as text
Which vim command saves the current file and exits the editor?
Answer: :wq
:wq writes (saves) the file and then quits vim in a single command.
What does the `grep -i` flag do?
Answer: Performs a case-insensitive search
The -i flag tells grep to ignore case differences when matching patterns, so 'Hello' matches 'hello'.
Which sed command replaces ALL occurrences of 'foo' with 'bar' on each line?
Answer: sed 's/foo/bar/g' file
The 'g' flag at the end of the sed substitution command makes it replace every occurrence on each line, not just the first.
What does `awk '{print $2}' file` output?
Answer: The second field (column) of each line
In awk, $2 refers to the second whitespace-delimited field of each input record.
Which command displays the last 10 lines of a file by default?
Answer: tail
The tail command shows the last 10 lines of a file by default; use -n to specify a different count.
What does `sort -n` do differently from `sort` without flags?
Answer: Sorts by numeric value instead of lexicographically
The -n flag causes sort to compare values as numbers, so '10' correctly sorts after '9' rather than before it.
Which command counts lines, words, and bytes in a file?
Answer: wc
The wc (word count) command reports the number of lines, words, and bytes in a file by default.