I'm trying to figure out why is the following tar command not working -
I've tried the following 2 versions & both don't work -
Version 1
tar -c --use-compress-program=pigz -f /home/jhonst/data_lake/1m/UX.tar -C '/home/jhonst/data_lake/1m/*.UX.csv'
The error I see is
tar: Cowardly refusing to create an empty archive
Try 'tar --help' or 'tar --usage' for more information.
Version 2
tar -c --use-compress-program=pigz -f /home/jhonst/data_lake/1m/UX.tar -C '/home/jhonst/data_lake/1m/*.UX.csv' .
The error I see is
tar:
/home/jhonst/data_lake/1m/*.UX.csv: Cannot open: No such file or directory
tar: Error is not recoverable: exiting now
Please could someone guide me on what I am doing wrong
CodePudding user response:
When you do:
tar -c --use-compress-program=pigz -f /home/jhonst/data_lake/1m/UX.tar /home/jhonst/data_lake/1m/*.UX.csv
You'll get:
tar -t -f /home/jhonst/data_lake/1m/UX.tar
home/jhonst/data_lake/1m/file1.UX.csv
home/jhonst/data_lake/1m/file2.UX.csv
...
Which is not the best. There are two possibilities for getting rid of the "path" inside the tar archive:
- Go inside the directory with
cd
(in a subshell or withpushd
/popd
if you want to return to the original directory after the tar command):
cd /home/jhonst/data_lake/1m && tar -c --use-compress-program=pigz -f UX.tar *.csv
# returning to the same place after the tar:
(cd /home/jhonst/data_lake/1m && tar -c --use-compress-program=pigz -f UX.tar *.csv)
# or:
pushd /home/jhonst/data_lake/1m && {
tar -c --use-compress-program=pigz -f UX.tar *.csv
popd
}
- Use the
-C
option of GNU tar, which is not that easy to handle:
dirpath=/home/jhonst/data_lake/1m
files=("$dirpath"/*.csv)
tar -c --use-compress-program=pigz -f "$dirpath"/UX.tar -C "$dirpath" "${files[@]#$dirpath/}"