You asked: How do you use the Uniq command in Unix?

How use uniq command in Linux?

Methods to Use Uniq Command in Linux with Examples

  1. 1) Omit duplicates. …
  2. 2) Display number of repeated lines. …
  3. 3) Print only the duplicates. …
  4. 4) Ignore case when comparing. …
  5. 5) Only print unique lines. …
  6. 6) Sort and find duplicates. …
  7. 7) Save the output in another file. …
  8. 8) Ignore characters.

What does uniq command do in Unix?

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 does the uniq command work?

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 I find 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: …
  4. Another perl way: …
  5. A shell script to fetch / find duplicate records:
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How do I use grep?

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’.

What does du command do in Linux?

The du command is a standard Linux/Unix command that allows a user to gain disk usage information quickly. It is best applied to specific directories and allows many variations for customizing the output to meet your needs.

Who wc Linux?

wc stands for word count. As the name implies, it is mainly used for counting purpose. It is used to find out number of lines, word count, byte and characters count in the files specified in the file arguments.

What is tr in shell script?

The tr command in UNIX is a command line utility for translating or deleting characters. It supports a range of transformations including uppercase to lowercase, squeezing repeating characters, deleting specific characters and basic find and replace. It can be used with UNIX pipes to support more complex translation.

What is awk Unix command?

Awk is a scripting language used for manipulating data and generating reports. The awk command programming language requires no compiling, and allows the user to use variables, numeric functions, string functions, and logical operators. … Awk is mostly used for pattern scanning and processing.

What is XXD command?

DESCRIPTION. xxd creates a hex dump of a given file or standard input. It can also convert a hex dump back to its original binary form. Like uuencode(1) and uudecode(1) it allows the transmission of binary data in a ‘mail-safe’ ASCII representation, but has the advantage of decoding to standard output.

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How do I sort uniq in Linux?

The Linux utilities sort and uniq are useful for ordering and manipulating data in text files and as part of shell scripting. The sort command takes a list of items and sorts them alphabetically and numerically. The uniq command takes a list of items and removes adjacent duplicate lines.

How do you find repeated words in Linux?

Explanation

  1. First you can tokenize the words with grep -wo , each word is printed on a singular line.
  2. Then you can sort the tokenized words with sort .
  3. Finally can find consecutive unique or duplicate words with uniq . 3.1. uniq -c This prints the words and their count.

How do I get unique lines in a file?

Find unique lines

  1. The file must be sorted first. sort file | uniq -u will output to console for you. – …
  2. I think the reason sort file | uniq shows all the values 1 time is because it immediately prints the line it encounters the first time, and for the subsequent encounters, it just skips them. –

How do I grep a file in Linux?

How to use the grep command in Linux

  1. Grep Command Syntax: grep [options] PATTERN [FILE…] …
  2. Examples of using ‘grep’
  3. grep foo /file/name. …
  4. grep -i “foo” /file/name. …
  5. grep ‘error 123’ /file/name. …
  6. grep -r “192.168.1.5” /etc/ …
  7. grep -w “foo” /file/name. …
  8. egrep -w ‘word1|word2’ /file/name.
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