FAQ: How to remove a specific line in a Linux file?

Removing a specific line from a text file on the command line in Linux. You can use the "flow editor to filter and transform text" sed. Here, -i means edit the file instead. d is the command to “remove space from pattern; Immediately start the next cycle.”

How do you remove a line in a file?

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

  1. a_file = open("sample.txt", "r") gets the list of lines.
  2. lines = a_file. readlines()
  3. a file.
  4. of the lines[1] remove lines.
  5. new_file = open(“sample.txt”, “w+”) writes to file without line.
  6. for line in lines:
  7. new file. write line)
  8. new file.

How do I remove 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 line you want to remove.

How do you delete part of a file in Linux?

How to delete files

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

How do you remove a line in bash?

# Delete whole words ALT+Delete 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 # Delete parts of the line CTRL+k Cut the line after the cursor to the clipboard CTRL+u Cut/delete the previous line...

How do I remove some lines in Unix?

To remove the lines from the source file itself, use the -i option with the sed command. If you don't want to remove 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 does it work :

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

How do I remove a line in CMD?

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

How do I remove the last 10 lines in Unix?

It's a small roundabout, but I think it's easy to follow.

  1. Count the number of lines in the main file.
  2. Subtract the number of lines you want to remove from the account.
  3. Print the number of lines you want to keep and save them to a temporary file.
  4. Replace the main file with the temporary file.
  5. Delete the temporary file.

How to remove a specific line in a C file?

Delete from a text file using C

  1. #include
  2. int main(){
  3. FILE *fptr1, *fptr2;
  4. char1 file[] ="file1.txt";
  5. char2 file[] ="file2.txt";
  6. char curr;
  7. int del, line_number = 0;
  8. printf("Enter the line number you want to delete: ");

How to force delete a file in Linux?

To remove a file or directory forcibly, you can use -f option forces a delete operation without rm requesting your confirmation. For example, if a file is not writable, rm will ask you if you want to delete that file or not, to avoid this and just run the operation.

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

Open the terminal app. To remove everything in a directory run: rm /path/to/dir/* To remove all subdirectories and files: rm -r /path/to/dir/*

Understanding the 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 several ways to open a file on a Linux system.

Open file in Linux

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

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

Cut (Delete)

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

How do you remove AWK lines?

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

How do I remove the last line in Unix?

6 answers

  1. Use sed -i '$d' to edit the file instead. – …
  2. What would it be like to remove the last n lines, where n is any integer? – …
  3. @JoshuaSalazar for i in {1..N}; sed -i '$d' ; done, don't forget to replace N – ghilesZ Oct 21 '15 at 15:00

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