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 delete multiple lines in Linux history?
You can use history -d offset builtin to delete a specific line from the current shell’s history, or history -c to clear the whole history. It’s not really practical if you want to remove a range of lines, since it only takes one offset as an argument, but you could wrap it in a function with a loop.
How do you select multiple lines in Unix?
Place your cursor somewhere in or next to the word you wish to select. Press Ctrl+D (Windows or Linux) or Command+D (Mac OS X) to highlight the entire word. Press Ctrl+D (Windows or Linux) or Command+D (Mac OS X) to select the next instance of the word. Repeat until you’ve selected the words you want to change.
How do I remove the first 10 lines in Unix?
Remove first N lines of a file in place in unix command line
- 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 . – …
- tail is multiple times faster for this task, than sed or awk . (
How do I remove the last 10 lines in Unix?
It’s a little roundabout, but I think it’s easy to follow.
- Count up the number of lines in the main file.
- Subtract the number of lines you want to remove from the count.
- Print out the number of lines you want to keep and store in a temp file.
- Replace the main file with the temp file.
- Remove the temp file.
How do I remove the first line in Unix?
To delete a charecter in a line
- Delete First two charters in lin sed ‘s/^..//’ file.
- Delete last two chrecters in line sed ‘s/..$//’ file.
- Delete blank line sed ‘/^$/d’ file.
How do I delete multiple lines in putty?
> If you know the number of lines to be deleted, take the cursor to the starting line and type “ndd”, where n is the no of lines to delete starting from the current line. > If you use ESC + : + m,$d + ENTER , it will delete all the lines starting from the mth line to the end of file.
How do I permanently delete Linux history?
There may come a time that you want to remove some or all the commands in your history file. If you want to delete a particular command, enter history -d <line number> . To clear the entire contents of the history file, execute history -c . The history file is stored in a file that you can modify, as well.
Can I delete .bash history?
First off, your bash history is retained in the file ~/. bash_history. When you have a terminal open, and you issue a command, it writes the command to the history file. So issuing history -c will clear the history from that file.
How do you select multiple lines?
To select more than one row in the data view, click one row, then hold the Control (Windows) or Command (Mac) key and select each of the other rows you wish to edit or remove. To select a continuous list, click one row, then hold the Shift key and click the last row.
How do you select multiple lines in vi?
Place your cursor anywhere on the first or last line of the text you want to manipulate. Press Shift+V to enter line mode. The words VISUAL LINE will appear at the bottom of the screen. Use navigation commands, such as the Arrow keys, to highlight multiple lines of text.
How do you select multiple lines in VS code?
Select the lines you want to have multiple cursors. Simply hit Alt + Shift – I .