sh delete line from file code example

Example 1: bash how to delete a specific line from a file

# Basic syntax:
sed 'line#d' input_file
# Where line# is the line you want to delete from the input_file

# Example usage:
input_file contains:
this is
my favorite
line

sed '2d' input_file
--> this is
--> line

Example 2: remove line with pattern

Use d option at the end of sed command string for deleting line of matches.
sed -i "" "s/matching_pattern/d" file.txt