r00 fileĬreates newarchive.rar from files foo and bar. ZĮxtract: gunzip -c > file.somethingĮxtracts decompressed file to current working directoryĬreates from the single file foo. tar.xzĮxtracts files from to current working directoryĬreates from the files foo and bar. tbz2Įxtracts files from 2 to current working directoryĬreates 2 from the files foo and bar. tgzĮxtracts files from to current working directoryĬreate: tar -czf foo barĬreates from the files foo and bar. You can access help by typing the commands with no &. Please familiarize yourself with connecting to your server through SSH, and basic shell commands. SSHĪrchives can be extracted and created via SSH. 7z can be created and extracted on Whatbox servers. The destination tar reads the stream, opens files, writes data, closes files, and repeats, where those operations have very little latency.An archive file is a file that is composed of one or more files along with metadata that can include source volume and medium information, file directory structure, error detection and recovery information, file comments, and usually employs some form of lossless compression.Īrchive files such as. All of the synchronous operations happen on the destination server. It simply outputs a stream describing all of the file data and metadata without waiting for any response to any operation. tar on the source system does not expect any responses from the destination. The critical part is that while the TCP stream is bi-directional (the source sends data, the destination sends ACKs), the tar data is uni-directional. tar xf -) moves all of the latency to the remote system. Both rsync and scp will have a lot of synchronous operations when you're copying a directory to an empty remote directory. If a tool sends a command and waits for the reply, then bandwidth will be idle most of the time during that round-trip. In general, rsync is a very good tool (even when copying local folders, you shouldn't reject it for that.) However, it has the same problem as scp when the destination is empty. So far in this thread, there's only one comment that gets close to an accurate answer. Without the slash ( foo), the directory foo will be created at the destination, and its contents copied into it. Include a slash ( foo/) and only the contents of foo will be copied to the destination. Remove the -dry-run to actually copy things.Īlso note that for the source path a trailing slash is meaningfull. The syntax I usually recommend is: rsync -aPh -dry-run /path/to/source will simply display on the screen what rsync would copy. Seriously, go spend a few hours learning how to use it. You've obviously never learned to use rsync, and you are missing out. It's bloody ubiquitous-included in every linux distribution, and even in MacOS. It isn't a “side-tool” (whatever that means). But rsync is hardly obscure, and I'm willing to bet that no one has spent the time to optimize scp -r because tools like rsync and sftp already exist. I'm sorry that you're put out by discovering that your clever work-around is, in fact, the hard way to do things. I usually use rsync to write files to a USB flash drive or SD card. It's quite common to use rsync in place of cp, especially when you want to copy an entire directory tree.
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