H3llo

I need a regular expression to delete all my unused lines,
for example:

do not delete

do not delete

do not delete

do not delete

I tried something like the string below but it doesnt work

sed '/ .*$//g' file > file2

Tony

To delete blank lines..

grep . file1

To delete blank lines and those lines which only contain spaces...

sed '/^ *$/d' file1

To delete blank lines and those lines which only contain spaces and tabs...

awk NF file1

works great! thx u

( why is this site so slow?)

Because you're running flash on a wimpy cpu. Click "user cp", "edit options" and pick something besides "green flash".

Or get a real cpu.

sed '/^[ <tab>]*$/d' file ,
This works pretty nicely..
<tab> - you have to press tab key there..