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I was copying some files using scp and i don't want to overwrite the already present files.
If i was using cp command, i think this can be done using cp -n.
Is there a similar option for scp, i went through the documentation of SCP and there seems to be no such option.
Is rsync or sftp the way to go solve this problem?
Addition Info:
OS: Ubuntu 12.04
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More specifically, what you can do is to make all destination files "read-only" before scp transfer. This will prevent any existing destination files from being overwritten by scp . After scp transfer is completed, restore the file permissions to the original state.
By default, existing files are overwritten. To control overwrite behavior, use --overwrite. (If the files are identical no transfer occurs regardless of this setting value.) Because scp uses authentication and encryption provided by ssh, a Secure Shell server must be running on the remote computer.
Copying files and directories with SCP or Rsync Secure Copy (SCP) uses SSH to copy only the files or directories that you select. On first use, Rsync copies all files and directories and then it copies only the files and directories that you have changed. It does not copy all the files and directories again.
To copy a directory (and all the files it contains), use scp with the -r option. This tells scp to recursively copy the source directory and its contents. You'll be prompted for your password on the source system ( deathstar.com ). The command won't work unless you enter the correct password.
rsync seems to be the solution to your problem. Here's an example I got from here:
rsync -avz foo:src/bar /data/tmp The -a option will preserve permissions, directory structure, ownership, and symlinks. You can also specify any of those options individually as well.
-v and -z mean verbose and compress respectively. You don't really need them although -z is nice if you are copying large files.
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I just found a simple hack. Mark the existing files as read-only.
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