How do I remove a specific line from a file in Unix?

How do I delete a single line in a text file?

The best way to do this is to open the file in text mode, read each line with ReadLine(), and then write it to a new file with WriteLine(), skipping the one line you want to delete.

How do you edit a specific line in Unix?

To do this, press Esc , type the line number, and then press Shift-g . If you press Esc and then Shift-g without specifying a line number, it will take you to the last line in the file.

How do I remove the first 10 lines in Unix?

Remove first N lines of a file in place in unix command line

1. Both sed -i and gawk v4.1 -i -inplace options are basically creating temp file behind the scenes. IMO sed should be the faster than tail and awk . – …
2. tail is multiple times faster for this task, than sed or awk . (

How do you delete one line from a file in Linux?

You can use the “stream editor for filtering and transforming text” sed. Here, -i means edit the file inplace. d is the command to “delete the pattern space; immediately start next cycle”.

How do I remove the last 10 lines in Unix?

It’s a little roundabout, but I think it’s easy to follow.

1. Count up the number of lines in the main file.
2. Subtract the number of lines you want to remove from the count.
3. Print out the number of lines you want to keep and store in a temp file.
4. Replace the main file with the temp file.
5. Remove the temp file.

How do I copy and paste a line in Vim?

How to copy and paste a line in Vim?

1. Make sure you’re in the normal mode. Press Esc to be sure. Then copy the entire line by pressing yy (more info :help yy ). …
2. Paste the line by pressing p . That will put the yanked line right under your cursor (on the next line).

How do I open a file in vi?

using :<line number> you can navigate to any line, thus :1 takes you to the first line. Key in 1 + G and it will take you to the beginning of the file. Converserly, G will take you to the end of the file.

How do you go to the start of a line in vi?

Moving to Start or End of Line

Press ^ to move the cursor to the start of the current line. Press $ to move the cursor to the end of the current line.

How do you remove the first 3 lines in Unix?

How it works :

1. -i option edit the file itself. You could also remove that option and redirect the output to a new file or another command if you want.
2. 1d deletes the first line ( 1 to only act on the first line, d to delete it)
3. $d deletes the last line ( $ to only act on the last line, d to delete it)

How do I remove lines from a file?

To Remove the lines from the source file itself, use the -i option with sed command. If you dont wish to delete the lines from the original source file you can redirect the output of the sed command to another file.

How do I remove the first line in Unix?

Using the sed Command

Removing the first line from an input file using the sed command is pretty straightforward. The sed command in the example above isn’t hard to understand. The parameter ‘1d’ tells the sed command to apply the ‘d’ (delete) action on line number ‘1’.

How do I remove the last line of a file in Linux?

6 Answers

1. Use sed -i ‘$d’ <file> to edit file in place. – …
2. What would be for deleting the last n lines, where n is any integer number? – …
3. @JoshuaSalazar for i in {1..N}; do sed -i ‘$d’ <file>; done dont forget to replace N – ghilesZ Oct 21 ’20 at 13:23.

How do you delete a file in Linux?

How to Remove Files

1. To delete a single file, use the rm or unlink command followed by the file name: unlink filename rm filename. …
2. To delete multiple files at once, use the rm command followed by the file names separated by space. …
3. Use the rm with the -i option to confirm each file before deleting it: rm -i filename(s)