How do I get unique values in Linux?
uniq Command in LINUX with examples
- Syntax of uniq Command : …
- Options For uniq Command: …
- Using -c option : It tells the number of times a line was repeated. …
- Using -D option : It also prints only duplicate lines but not one per group. …
- Using -u option : It prints only the unique lines.
How do I get unique values from a column in Unix?
2 Alternatives + Submit Alt
- Display unique values of a column. the column number is ‘6’ cut -d’,’ -f6 file.csv | sort | uniq. richie · 2013-04-10 14:05:32 1.
- Display unique values of a column. 3 is the column’s number. -3. cut -f 3 | uniq. flxndn · 2012-06-06 10:48:41 2.
How do I find unique lines in a file?
Find unique lines
- The file must be sorted first. sort file | uniq -u will output to console for you. – ma77c. …
- 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. – Reeshabh Ranjan.
How do I remove duplicates 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 command is used to identify files?
The ‘file’ command is used to identify the types of file. This command tests each argument and classifies it. The syntax is ‘file [option] File_name’.
Which grep command will display the number which has 4 or more digits?
Specifically: [0-9] matches any digit (like [[:digit:]] , or d in Perl regular expressions) and {4} means “four times.” So [0-9]{4} matches a four-digit sequence. [^0-9] matches characters not in the range of 0 through 9 . It is equivalent to [^[:digit:]] (or D , in Perl regular expressions).
What does cd command do in Unix?
The change directory (cd) command is built into the system shell and changes the current working directory. The cd command can be used to either change to a directory that is relative to the the location of the current working directory or to an absolute location in the filesystem.
How do I print a column in Linux?
How to do it…
- To print the fifth column, use the following command: $ awk ‘{ print $5 }’ filename.
- We can also print multiple columns and insert our custom string in between columns. For example, to print the permission and filename of each file in the current directory, use the following set of commands:
How can I find the difference between two files in Linux?
Comparing files (diff command)
- To compare two files, type the following: diff chap1.bak chap1. This displays the differences between the chap1. …
- To compare two files while ignoring differences in the amount of white space, type the following: diff -w prog.c.bak prog.c.
Which Unix command is used to output only the unique line from a file?
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.