How do I find duplicate records in a text file in Unix?

uniq command has an option “-d” which lists out only the duplicate records. sort command is used since the uniq command works only on sorted files. uniq command without the “-d” option will delete the duplicate records.

How do I remove duplicates from a text file 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. For uniq to work, you must first sort the output.

How print duplicate lines in Unix?

Unix / Linux : How to print duplicate lines from file

  1. In above command :
  2. sort – sort lines of text files.
  3. 2.file-name – Give your file name.
  4. uniq – report or omit repeated lines.
  5. Given below is example. Here, we are find the duplicate lines in file name called list. With cat command, we have shown the content of file.
READ  How do you change the BIOS on a Lenovo laptop?

12 сент. 2014 г.

How do I find duplicates in TextPad?


  1. open the file in TextPad.
  2. select Tools > Sort.
  3. check the box at ‘remove duplicate lines’
  4. click OK.

20 мар. 2010 г.

How do I search for text in a Unix file?

The grep command searches through the file, looking for matches to the pattern specified. To use it type grep , then the pattern we’re searching for and finally the name of the file (or files) we’re searching in. The output is the three lines in the file that contain the letters ‘not’.

Which command is used to identify files?

The file command uses the /etc/magic file to identify files that have a magic number; that is, any file containing a numeric or string constant that indicates the type. This displays the file type of myfile (such as directory, data, ASCII text, C program source, or archive).

How do I get unique records in Unix?

How to find duplicate records of a file in Linux?

  1. Using sort and uniq: $ sort file | uniq -d Linux. …
  2. awk way of fetching duplicate lines: $ awk ‘{a[$0]++}END{for (i in a)if (a[i]>1)print i;}’ file Linux. …
  3. Using perl way: $ perl -ne ‘$h{$_}++;END{foreach (keys%h){print $_ if $h{$_} > 1;}}’ file Linux. …
  4. Another perl way: …
  5. A shell script to fetch / find duplicate records:

3 окт. 2012 г.

How do I print duplicate lines in Linux?

Explanation: The awk script just prints the 1st space separated field of the file. Use $N to print the Nth field. sort sorts it and uniq -c counts the occurrences of each line.

READ  Best answer: What are the advantages of BIOS?

How do I find duplicates in a csv file?

Macro Tutorial: Find Duplicates in CSV File

  1. Step 1: Our initial file. This is our initial file that serves as an example for this tutorial.
  2. Step 2: Sort the column with the values to check for duplicates. …
  3. Step 4: Select column. …
  4. Step 5: Flag lines with duplicates. …
  5. Step 6: Delete all flagged rows.

1 мар. 2019 г.

Which command is used for locating repeated and non repeated lines?

1. Which command is used for locating repeated and non-repeated lines? Explanation: When we concatenate or merge files, we can encounter the problem of duplicate entries creeping in. UNIX offers a special command (uniq) which can be used to handle these duplicate entries.

How do I get rid of duplicate lines?

Go to the Tools menu > Scratchpad or press F2. Paste the text into the window and press the Do button. The Remove Duplicate Lines option should already be selected in the drop down by default. If not, select it first.

How do I search for text in all files in Linux?

To find files containing specific text in Linux, do the following.

  1. Open your favorite terminal app. XFCE4 terminal is my personal preference.
  2. Navigate (if required) to the folder in which you are going to search files with some specific text.
  3. Type the following command: grep -iRl “your-text-to-find” ./

4 сент. 2017 г.

How do I use grep to search a folder?

To include all subdirectories in a search, add the -r operator to the grep command. This command prints the matches for all files in the current directory, subdirectories, and the exact path with the filename. In the example below, we also added the -w operator to show whole words, but the output form is the same.

READ  Best answer: How do I disable graphics in BIOS?

How do I grep a word in a directory?

GREP: Global Regular Expression Print/Parser/Processor/Program. You can use this to search the current directory. You can specify -R for “recursive”, which means the program searches in all subfolders, and their subfolders, and their subfolder’s subfolders, etc. grep -R “your word” .

Like this post? Please share to your friends:
OS Today