how to delete blank rows in a log file

Shell Programming and Scripting
1

Help

How to delete all blank rows in log file

2

please use the search button of the forums

there are many ways to do that

grep -v ^$ file_name

awk ' length { print }' filename
3

try using this command
sed '/^$/ d' filename

4

u can use:

awk 'NF>0' in_file > out_file
5

You can also use:

print 'g/^$/delete\nwq' | ex filename
or
echo 'g/^$/delete\nwq' | ex filename

The print or echo depends on the shell you use. This will edit the file directly without having to deal with a second file and renaming it back to the original.