sed:remove_whitespace_from_a_file
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SED - Remove whitespace from a file
Delete whitespace from begin of each line
cat input.txt | 's/^[ \t]*//' > output.txt
Delete trailing whitespace from end of each line
cat input.txt | sed 's/[ \t]*$//' > output.txt
Remove leading and trailing whitespace from each line
cat input.txt | sed 's/^[ \t]*//;s/[ \t]*$//' > output.txt
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/remove_whitespace_from_a_file.1576002649.txt.gz · Last modified: 2020/07/15 09:30 (external edit)