---------------------- hello, i have tried to remove blank lines from a file using korn shell script file.. it doesn't seem to work! i tried sed '/^\s*$/d' infile > outfile but that didn't work i tried sed 's/ *$//;/^$/d' infile > outfile and that didn't work i tried sed '/^s./d' infile > outfile and that didn't work what can i do? this is a huge file and some blank lines might be spaces? or tabs? how can i know? thank you

On my Solaris 9 box, this works: #!/bin/ksh sed '/^[ ]*$/d' tfile Be advised that with the above one-liner between the brackets: [ ] is a space bar and a tab key. Some versions of sed allow using \t as a tab.

if it does not have to be sed, you could use tr: tr -s "\n"

The tr solution handles only newlines; it does not handle lines that are all spaces or tabs.

awk can check for Number of Fields greater than zero. awk 'NF>0' infile > outfile

Thank you all for your help!!!