bash remove line from file code example

Example 1: sed remove line containing

sed '/pattern to match/d' ./infile

Example 2: delete lines text file linux

sed -i '' '/pattern to match/d' ./infile

Example 3: linux remove lines from file

> sed '2,4d' file

Example 4: 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