sed:delete:delete_both_leading_and_trailing_whitespace_from_each_line
Table of Contents
SED - Delete - Delete BOTH leading and trailing whitespace from each line
sed 's/^[ \t]*//;s/[ \t]*$//'
NOTE: Aligns all text flush left.
NOTE: The expression '\t' is used to indicate a tab character (0x09) in the scripts.
Some versions of sed do not recognize the '\t' abbreviation, so when typing these scripts from the command line, you should press the TAB key instead.
'\t' is supported as a regular expression.
Example
Example
cat input.txt | sed 's/^[ \t]*//;s/[ \t]*$//' > output.txt
Example - Remove all whitespace (including tabs) from beginning of string
echo " This is a test" | sed -e 's/^[ \t]*//'
result:
This is a test
Where,
- s/ : Substitute command ~ replacement for pattern (^[ \t]*) on each addressed line
- ^[ \t]* : Search pattern ( ^ – start of the line; [ \t]* match one or more blank spaces including tab)
- ** : Replace (delete) all matched pattern —-
sed/delete/delete_both_leading_and_trailing_whitespace_from_each_line.txt · Last modified: 2020/08/16 12:28 by 192.168.1.1