Frequent question: How do you delete a specific line in a file Linux?

Deleting a Specific Line From a Text File in Command Line 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 you delete a line in a file?

Use del to delete a line from a file where its position is known {#use-del)

  1. a_file = open(“sample.txt”, “r”) get list of lines.
  2. lines = a_file. readlines()
  3. a_file.
  4. del lines[1] delete lines.
  5. new_file = open(“sample.txt”, “w+”) write to file without line.
  6. for line in lines:
  7. new_file. write(line)
  8. new_file.

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 delete part of 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)

How do you delete a line in bash?

# Deleting whole words ALT+Del Delete the word before (to the left of) the cursor ALT+d / ESC+d Delete the word after (to the right of) the cursor CTRL+w Cut the word before the cursor to the clipboard # Deleting parts of the line CTRL+k Cut the line after the cursor to the clipboard CTRL+u Cut/delete the line before …

How do I remove a few lines in Unix?

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 100 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 delete a line in CMD?

Go to beginning of the line: Ctrl + A. Go to end of the line: Ctrl + E. To clear your entire command prompt: Ctrl + L.

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 you delete a specific line in a file C?

Delete from a text file using C

  1. #include<stdio.h>
  2. int main(){
  3. FILE *fptr1, *fptr2;
  4. char file1[] =”file1.txt”;
  5. char file2[] =”file2.txt”;
  6. char curr;
  7. int del, line_number = 0;
  8. printf(“Please enter the line number you want to delete : “);

How do you force delete a file in Linux?

To remove file or directory forcefully, you can use the option -f force a deletion operation without rm prompting you for confirmation. For example if a file is unwritable, rm will prompt you whether to remove that file or not, to avoid this and simply execute the operation.

How do I remove all files from a directory in Linux?

Open the terminal application. To delete everything in a directory run: rm /path/to/dir/* To remove all sub-directories and files: rm -r /path/to/dir/*

Understanding rm command option that deleted all files in a directory

  1. -r : Remove directories and their contents recursively.
  2. -f : Force option. …
  3. -v : Verbose option.

How do you open a file in Linux?

There are various ways to open a file in a Linux system.

Open File in Linux

  1. Open the file using cat command.
  2. Open the file using less command.
  3. Open the file using more command.
  4. Open the file using nl command.
  5. Open the file using gnome-open command.
  6. Open the file using head command.
  7. Open the file using tail command.

What is the command to delete and cut the current line in vi?

Cutting (Deleting)

Move the cursor to the desired position and press the d key, followed by the movement command. Here are some helpful deleting commands: dd – Delete (cut) the current line, including the newline character.

How do you delete AWK lines?

1: This is a test file. 2: Use the awk command NR variable to delete a specific line 3: Use the sed command action option d to delete a specific line 4: Awk command supports condition judgment 5: awk command supports loop function 6: The sed command has rich action options: a, d, g …

How do I remove the last line in Unix?

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.
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