Noobie Command Question help!!
here's the question:
"Sort the combined contents of the files file10 and file9. Redirect the output to file3 replacing the current content. Your current working directory is /opt use relative paths only. Use character class to NOT select file8, but select file9 and file10..."
This is what i tried, but failed:
sort -m ./opt/file[:3:][:4:] > ../lab/file3
how can i complete this?