I want to gunzip a filename, stored in $2, to a specified directory, stored in $3. For example,
if [ -f $2 ]; then
gunzip $2
here I want to remove .gz from $2
mv $2 $3
fi
so from the terminal command line when running a script I type:
-z anotherdirectory/test.txt user/harry
because the error says mv: cannot stat ‘backup/test.txt.gz’: No such file or directory.
Thank you everyone!!
To remove a single extension, use the % suffix deletion operator:
mv "${2%.*}" "$3"
or if you wanted to only remove .gz, you could use:
mv "${2%.gz}" "$3"
But you could avoid the copy altogether by uncompressing the file directing where you want it to go:
gunzip -c "$2" > "$3"
The -c option tells gunzip to write to stdout. Unlike a normal gunzip, that does not remove the gzip file, so you would have to rm it afterwards.
It's worth noting that gunzip understands other extensions such as tgz; it will decompress foo.tgz to foo.tar, not foo. So the command which just deletes the extension will not work with all extensions, whereas gunzip -c will.
mv $(echo $2 |sed 's/\.gz$//') $3
Also you should check this tutorial about sed
