SED - Deletion

    Deleting first line:  sed ‘1d’  filename

    Deleting particular line:  sed ‘3d’ filename 🡪 deletes the third line

Deleting Last line: sed ‘$d’ filename

Deleting the range of line:  sed  ‘1,4d’ filename  🡪 deletes from 1 to 4th line

Deleting other than range of line:  sed ‘1,4!d’ filename 🡪 it deletes other than 1 to 4th line

Deleting first and last line:  sed  ‘1d;$d’ filename 🡪 multiple commands separated by colon

Starting with L :  sed  ‘/^L/d’ filename 🡪 deletes the line starting with L

Ending with L :   sed  ‘/L$/d’  filename  🡪 deletes the line ending with L

Ending with l or L :  sed  ‘/[xX]$/d’  filename  🡪 deletes the line with l or L

Empty or Blank space line:   sed  ‘/^ *$/d’  filename 

Containing specific pattern:   sed ‘/Linux/d’  filename  🡪 deletes the line containing linux

Deletes from the first line to pattern matching  🡪 sed  ‘1, /Linux/d’ filename

Deletes from pattern matching to last line of the file 🡪 sed ‘/Linux/,$d’  filename

Deleting all other lines other than matching pattern 🡪 sed ‘/linux/!d’ filename

Delete Empty line in file

• sed ‘/^$/d’ filename

Deleting Multiple Blank lines

• /^$/{

N

/^\n$/D

}