How do I print line numbers in sed?

How do I print line numbers in sed?

2 Answers

1. AWK: awk ‘NR==2,NR==4{print NR” “$0}’ file.txt.
2. Double sed: sed ‘2,4! d;=’ file.txt | sed ‘N;s/\n/ /’
3. glen jackmann’s sed and paste: sed ‘2,4! d;=’ file.txt | paste -d: – –
4. bart’s Perl version: perl -ne ‘print “$. $_” if 2..4’ file.txt.
5. cat and sed: cat -n file.txt | sed -n ‘2,4p’
6. A bit of explanation:

How do you print a specific line in Unix using sed?

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 you specify a range of lines in sed?

sed Address and address range Specific range of lines

1. Range specified is inclusive of those line numbers $ sed -n ‘2,4p’ ip.txt range substitution pattern.
2. $ can be used to specify last line. Space can be used between address and command for clarity $ sed -n ‘3,$ s/[aeiou]//gp’ ip.txt sbstttn pttrn smpl.

How do you find the line number in a string?

The -n ( or –line-number ) option tells grep to show the line number of the lines containing a string that matches a pattern. When this option is used, grep prints the matches to standard output prefixed with the line number.

How do I print line numbers in Unix?

You can toggle the line number display from the menu bar by going to View -> Show Line Numbers. Selecting that option will display the line numbers on the left hand side margin of the editor window. You can disable it by deselecting the same option. You can also use the keyboard shortcut F11 to toggle this setting.

How do I print line numbers in grep?

To Display Line Numbers with grep Matches Append the -n operator to any grep command to show the line numbers. We will search for Phoenix in the current directory, show two lines before and after the matches along with their line numbers.

How do you display the 10th line of a file in Unix?

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

1. head -10 bar.txt.
2. head -20 bar.txt.
3. sed -n 1,10p /etc/group.
4. sed -n 1,20p /etc/group.
5. awk ‘FNR <= 10’ /etc/passwd.
6. awk ‘FNR <= 20’ /etc/passwd.
7. perl -ne’1..10 and print’ /etc/passwd.
8. perl -ne’1..20 and print’ /etc/passwd.

What is D in sed?

It means that sed will read the next line and start processing it. Your test script doesn’t do what you think. It matches the empty lines and applies the delete command to them.

How do I show line numbers in grep?

How do you number lines in Linux?

To activate the line numbering, set the number flag:

1. Press the Esc key to switch to command mode.
2. Press : (colon) and the cursor will move at the bottom left corner of the screen. Type set number or set nu and hit Enter . :set number.
3. Line numbers will be displayed at the left side of the screen:

Is SED a real word?

sed v. (neologism, slang) To edit a file or stream of text using sed. sed n. (fishing) A line fastening a fish-hook. COMPUTING DEVELOPED EDIT EDITOR FASTENING FILE FISH FISHING FOR HOOK IN INTENDED LINE MAKING NEOLOGISM NONINTERACTIVE OF OR ORIGINALLY SED SLANG STREAM TEXT TO USING

How to get only second line with SED?

‘PHP’ text contains two times in the second line of the file, input.txt. Two `sed` commands are used in this example to remove those lines that contain the pattern ‘ php ‘ two times. The first `sed` command will replace the second occurrence of ‘php’ in each line by ‘ dl ‘ and send the output into the second `sed` command as input.

How to select lines containing several words using SED?

I want perform some opreation on the lines which does not have search_pattern1 or search_pattern2.

Can I use variables in sed command in line numbers?

Variables do not expand inside single quotes. Use double quotes. However, I am concerned about your use of sed here. Are you running sed 100 times to read 100 lines?? That’s like making 100 phone calls to say 100 words. It’d be much better to use read in a while loop: