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What command would you use to remove duplicates in a file?
The uniq command is used to remove duplicate lines from a text file in Linux. By default, this command discards all but the first of adjacent repeated lines, so that no output lines are repeated. Optionally, it can instead only print duplicate lines.
What is unique command?
The uniq command in Linux is a command line utility that reports or filters out the repeated lines in a file. In simple words, uniq is the tool that helps to detect the adjacent duplicate lines and also deletes the duplicate lines.
How to remove duplicate lines from a file?
Explanation: The n flag passed to cat appends line numbers to left of every line, plus space, then the first sort says sort by unique and but only after the first word, the second sort command says use the line numbers we stored in step 1 to resort by the original ordering, finally cut off the first word.
Is it safe to delete duplicate files on your computer?
It can be safe to delete some of the duplicate files your duplicate file finder identifies. For example, if you have duplicate copies of photos on your machine, you may need only one. For example, if you have duplicate copies of photos on your machine, you may need only one.
Is it safe to delete duplicates of stats.dll?
In fact, you may have two identical, duplicate copies of STATS.DLL. But deleting either one would be a big mistake: deleting A’s copy would break A and deleting B’s copy would break B. You need both copies, even if they are duplicates. It can be safe to delete some of the duplicate files your duplicate file finder identifies.
How to remove all but the last line in a file?
As removing all but the last occurrence is the inverse of removing all but the first, there is also this solution: tac reverses lines in the file, and awk will only output the first occurrence of a duplicate line.