Frequent Question: How Do I Print Duplicate Lines in Linux?
Contents to Make Uniq Print Only Duplicate Lines, Use the -D Command Line Option. for Example, Suppose File1 Now Contains an Extra Line at the Bottom (Note...
To make uniq print only duplicate lines, use the -D command line option. For example, suppose file1 now contains an extra line at the bottom (note that this line is not repeated). As you can see, the -D option makes uniq display all repeated lines in output, including all their repetitions.
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.
How do you print duplicates in Unix?
How to find duplicate records of a file in Linux?
- Using sort and uniq: $ sort file | uniq -d Linux. …
- awk way of fetching duplicate lines: $ awk ‘{a[$0]++}END{for (i in a)if (a[i]>1)print i;}’ file Linux. …
- Using perl way: …
- Another perl way: …
- A shell script to fetch / find duplicate records:
James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.
