We will now assume the previous use case but with file names that may be the same which will cause file name collisions when merged. Merging two directories with files with file name collisions Let’s see the options that rsync provide to merge directories …. When you don’t know for sure, always assume that there are file collisions. bash$ rm -fr first/ second/Īlthough the cp will work in this situation, I would recommend that you use rsync utility to perform large scale directory syncing. You can remove the directories using the rm command after you have copied the files to the third/ folder. bash$ cp -fr first/ third/ & cp -fr second/ third/ Each of the directories and it sub-directories will copy its contents into the new folder. We can use the cp or copy command here, as there are no file name conflicts. This is probably the easiest of the cases that you would encounter. They contain files but all of those files have unique file names that do not clash with each other. Let say we want to merge two different directories ( first/ and second/) each of which contain a set of files and some sub-directories in each of them. Merging two directories with unique file names You should be able extrapolate the other cases such as merging first/ and second/ into the same folder second/ etc. Let’s assume that we want to merge two different folders named first/ and second/ …into a new folder named third/. That means there are several different ways to achieve the required result by using different Linux commands such as find, mv, cp, rm, rsync etc. The merge process is essentially a combination of moving, renaming and deleting files. In such cases, we need to figure out what the name and content of the resulting file needs to be. The issue itself occurs when there are files in the directories with same or conflicting names. There can be other requirements associated with this, but we will tackle those as we go along.Ĭreating a new directory with files from multiple directories itself is not very complicated. Let’s assume that merging of (two or more) directories means “ to create a new directory with files from all of the merged directories“. There can be a variety of requirements that could be named as merging of directories. This will start Unison both before you login and after you logout.Īpropos, other great X commands that you could put there are setxkbmap(1), xrandr(1), xmodmap(1) and xsetroot(1).Before we merge two or more directories, we need to define what we mean by “ merge” in the context of directories. Since some user intervention is preferred to investigate potential file conflicts, and we use X(7) anyway, we also here use the graphical interface of unison(1).įirst create $/.xinitrc to be sure), and include:Īnd optionally replace unity for the command to start your preferred window manager or desktop environment. You can set up key authentication between your laptop and loginb (same as sync), see sshd(8), such that you don't have to enter your password into Unison. But for this you should exclude some exceptions, and sync while not running any other programs under your user name. If you are careful, you can cleanly sync your complete home directory with Unison. If the file list disappears and the status at the bottom says Everything is up to date is all as it should be. When you are ready to start the synchronization, click Go. If you would like to not synchronize specific files you just click on them and select Skip Merge will merge the files, and click' Diff shows the differences between them (this only works with plain text files). Unison requires that you determine how to resolve the conflict, click on the Right to Left overwrites the file remote file locally, click the Left to Right, the opposite happens. At the top you will see a file with the same name, local and remote, but have different content. The picture on the left shows how a typical Unison synchronization may appear. The first synchronization may take some time depending on how large amount of data Unison now detects timestamp of last modification, permissions, ownership and i-node number for each file in both local and remote, and stores this in an archive. Unison is SSH-based so by setting up key authentication it is not required to entering the password more than once. The first time you open your profile you will be asked to authenticate, and then use your normal UiB password.
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