I'm trying to silent zcat warning through the option -q or 2>/dev/null
so far nothing is working. I keep getting the same warning when a file name is missing.
I'm looping through 100s of compressed files to extract a specific data. The idea is if zcat encounter a bad name or a missing file name, zcat will just stay quite and wait for the next cycle, but currently this is what I'm getting when using both options
zcat -q $ram | head -n1 or zcat $ram | head -n1 2>/dev/null
gzip: compressed data not read from a terminal. Use -f to force decompression.
For help, type: gzip -h
Any idea how to solve that or a faster way to read a .gz file with a silent feature that works?
Thanks
At present, you're redirecting only stderr from head; you're not redirecting from zcat at all. If you want to redirect stderr from zcat, then you need to put the redirection before the pipe symbol, like so:
zcat $ram 2>/dev/null | head -n1