SED - Delete
Delete all instances of a character
Delete all lines of a file with N characters
Delete all lines with a specific string
Delete blank lines and insert one blank line after each line
Delete all CONSECUTIVE blank lines from file except the first
Delete all CONSECUTIVE blank lines from file except the first 2
Delete BOTH leading and trailing whitespace from each line
Delete duplicate, consecutive lines from a file
Delete duplicate, nonconsecutive lines from a file
Delete everything after first blank line
Delete everything up to first blank line
Delete first N lines of a file
Delete last line of each paragraph
Delete leading angle bracket & space from each line (unquote a message)
Delete leading blank lines at top of file
Delete leading whitespace (spaces, tabs) from front of each line
Delete leading zeroes from selected double quoted fields
Delete nroff overstrikes (char, backspace) from man pages
Delete trailing blank lines at end of file
Delete trailing whitespace (spaces, tabs) from end of each line