Your question: How do you print the nth line in Unix?

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How do I print the nth line in Linux?

Below are three great ways to get the nth line of a file in Linux.

head / tail. Simply using the combination of the head and tail commands is probably the easiest approach. …
sed. There are a couple of nice ways to do this with sed . …
awk. awk has a built in variable NR that keeps track of file/stream row numbers.

How do you find the nth line in Unix?

5 Answers. Sure. If the file is long and you’re only interested in one line, use sed to print the desired line and quit, or tail to remove the previous lines and head to extract the first line of the result. (Note that tail -n +$n skips n-1 lines, i.e. its output starts with the nth line.)

How do I print the nth column in Unix?

Printing the nth word or column in a file or line

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 do you print a range of lines in Unix?

Linux Sed command allows you to print only specific lines based on the line number or pattern matches. “p” is a command for printing the data from the pattern buffer. To suppress automatic printing of pattern space use -n command with sed.

How do I print a particular line in Linux?

Print a single specific line

The “head -x” part of the command will get the first x lines of the files. It will then redirect this output to the tail command. The tail command will display all the lines starting from line number x.

What command will print all lines in the file?

grep treats EOF as line delimiter, so grep ‘^. *$’ file will print the last line even if there’s no newline at the end of file.

How do you select a line in Linux?

Press Shift+End for the end of the line. If you want to copy the whole line from first to last simply place the cursor somewhere in that line and hit CTRL+C. Press Home key to get to the start of the line. For Selecting multiple lines, use Up/Down key.

How use awk in Unix?

AWK Operations: (a) Scans a file line by line. (b) Splits each input line into fields. (c) Compares input line/fields to pattern. (d) Performs action(s) on matched lines.
Useful For: (a) Transform data files. (b) Produce formatted reports.
Programming Constructs:

31 янв. 2021 г.

How do I show the 10th line of a file in Linux?

Type the following head command to display first 10 lines of a file named “bar.txt”:

head -10 bar.txt.
head -20 bar.txt.
sed -n 1,10p /etc/group.
sed -n 1,20p /etc/group.
awk ‘FNR <= 10’ /etc/passwd.
awk ‘FNR <= 20’ /etc/passwd.
perl -ne’1..10 and print’ /etc/passwd.
perl -ne’1..20 and print’ /etc/passwd.

18 дек. 2018 г.

How do I print the last column of a file in Unix?

Use awk with field separator -F set to a space ” “. Use the pattern $1==”A1” and action {print $NF} , this will print the last field in every record where the first field is “A1”.

How do I change my awk delimiter?

Just put your desired field separator with the -F option in the AWK command and the column number you want to print segregated as per your mentioned field separator.

How do you cut a tab delimited file in Unix?

Cut splits the input lines at the given delimiter (-d, –delimiter). To split by tabs omit the -d option, because splitting by tabs is the default. By using the -f (–fields) option you can specify the fields you are interrested in.

How do you cut a few lines in Unix?

If you use the -l (a lowercase L) option, replace linenumber with the number of lines you’d like in each of the smaller files (the default is 1,000). If you use the -b option, replace bytes with the number of bytes you’d like in each of the smaller files.

How do I print lines between two patterns?

Print lines between PAT1 and PAT2

/PAT1/{flag=1} sets the flag when the text PAT1 is found in a line. /PAT2/{flag=0} unsets the flag when the text PAT2 is found in a line. flag is a pattern with the default action, which is to print $0 : if flag is equal 1 the line is printed.

How extract a few line in Linux?

To extract a range of lines, say lines 2 to 4, you can execute either of the following:

$ sed -n 2,4p somefile. txt.
$ sed ‘2,4! d’ somefile. txt.