The uniq command in UNIX is a command line utility for reporting or filtering repeated lines in a file. It can remove duplicates, show a count of occurrences, show only repeated lines, ignore certain characters and compare on specific fields.
How do I remove duplicate lines in Unix?
You need to use shell pipes along with the following two Linux command line utilities to sort and remove duplicate text lines:
- sort command – Sort lines of text files in Linux and Unix-like systems.
- uniq command – Rport or omit repeated lines on Linux or Unix.
Which filter is used to remove duplicate lines in Unix?
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.
How do I remove duplicate files in Linux?
4 Useful Tools to Find and Delete Duplicate Files in Linux
- Rdfind – Finds Duplicate Files in Linux. Rdfind comes from redundant data find. …
- Fdupes – Scan for Duplicate Files in Linux. …
- dupeGuru – Find Duplicate Files in a Linux. …
- FSlint – Duplicate File Finder for Linux.
What does uniq do in Linux?
The uniq command can count and print the number of repeated lines. Just like duplicate lines, we can filter unique lines (non-duplicate lines) as well and can also ignore case sensitivity. We can skip fields and characters before comparing duplicate lines and also consider characters for filtering lines.
How do you find duplicate lines in Unix?
The uniq command in UNIX is a command line utility for reporting or filtering repeated lines in a file. It can remove duplicates, show a count of occurrences, show only repeated lines, ignore certain characters and compare on specific fields.
Which of the following filter is used to remove duplicate lines?
5. uniq : Removes duplicate lines.
How do I get rid of duplicate lines?
Remove duplicate values
- Select the range of cells that has duplicate values you want to remove. Tip: Remove any outlines or subtotals from your data before trying to remove duplicates.
- Click Data > Remove Duplicates, and then Under Columns, check or uncheck the columns where you want to remove the duplicates. …
- Click OK.
How many types of permissions a file has in Unix?
Explanation: In UNIX system, a file can have three types of permissions -read, write and execute.
What is the output of who command?
Explanation: who command output the details of the users who are currently logged in to the system. The output includes username, terminal name (on which they are logged in), date and time of their login etc. 11.
How do I find and remove duplicate unwanted files using Fslint tool in Linux?
You may fire the GUI Application built on top of fslint by typing fslint from Linux terminal or from the Application Menu.
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All you need to do is:
- Add/remove the directories to scan.
- Select to scan recursively or not by checking/unchecking checkbox on the top-right.
- Click on ‘Find’. And all done!
What is the use of awk in Linux?
Awk is a utility that enables a programmer to write tiny but effective programs in the form of statements that define text patterns that are to be searched for in each line of a document and the action that is to be taken when a match is found within a line. Awk is mostly used for pattern scanning and processing.