I am in the process of migrating a machine from RHEL 4 to 5. Rather than actually do an upgrade we have created a new VM (both machines are in a cloud) and I am in the process of copying across data between the two.
I was changing file permissions and I noticed that some of the permissions
modes ended in @ as in [email protected], or a + as in drwxr-x---+. I’ve looked
at the man pages for chmod and chown, and searched around different help
forums, but I can’t find anything about what these symbols mean.
How to add an ssh user who only has permissions to access specific folder?
And now I am unable to chmod it back.. or use any of my other system programs. Luckily this is on a VM I’ve been toying with, but is there any way to resolve this? The system is Ubuntu Server 12.10.
Is there a command or flag to clone the user/group ownership and permissions on a file from another file? To make the perms and ownership exactly those of another file?
How can I mount some device with read-write access for a given user?
I have ubuntu server on digitalocean and I want to give someone a folder for their domain on my server, my problem is, I don’t want that user to see my folders or files or to be able to move out their folder.
I was reading up on chmod and its octal modes. I saw that 1 is execute only. What is a valid use case for an execute only permission? To execute a file, one typically would want read and execute permission.
Well, to be specific, it was chmod -R 755. Now every file is executable, which I don’t want.
I am thinking that I should look at the first two bytes of each file for the #!, but will this cover everything? Should I instead use file to look at everything and base my decision on that? Or, more likely, is there an even better way to do this?
I want to format my USB stick to ext4 and just use as I would any other typical non-linux format drive (FAT32, exFAT, NTFS).