/bin/tar: unrecognized option: format=gnu
BusyBox v1.36.1 (2025-06-06 10:34:56 UTC) multi-call binary.
Usage: tar c|x|t [-zahvokO] [-f TARFILE] [-C DIR] [-T FILE] [-X FILE] [FILE]…
Create, extract, or list files from a tar file
c Create
x Extract
t List
-f FILE Name of TARFILE ('-' for stdin/out)
-C DIR Change to DIR before operation
-v Verbose
-O Extract to stdout
-o Don't restore user:group
-k Don't replace existing files
-z (De)compress using gzip
-a (De)compress based on extension
-h Follow symlinks
-T FILE File with names to include
-X FILE File with glob patterns to exclude
Packaged contents of /tmp/is-backup/app-meta-wan-mac_1.0.1-20230405_all into /mnt/backup/istore_backup/backup_istore_2025-1023-0921/app-meta-wan-mac_1.0.1-20230405_all.ipk
write backup file to /mnt/backup/istore_backup/backup_istore_2025-1023-0921.backup.tar.gz