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What does it mean if two files have the same inode number?
Yes, the same inode number may appear at a different filesystem. If you want to specify the exact, you not only need the inode number (st_ino) but also the device where the inode resides (st_dev, itself formed by dev_major —the general class of device— and dev_minor —the specific instance—).
Which file directory has an inode of 2?
root file system
“ls -i” lists the inode of a file As Unix systems can support many different types of file systems, in the “classic” filesystem, inode #2 is always the root file system. If you want to look for a file, you start with inode #2 and work down into the directory structure.
Do directories have inode numbers?
Each Unix directory is itself an inode. Like all inodes, directory inodes contain pointers to disk blocks and attribute information about the inode (permissions, owner, etc.), but what is stored in the disk blocks of a directory inode is not file data but directory data.
What creates another file that points to the same inode number?
The “ln” command will create a new name-inode map in a directory. Given an existing file name, this command will create another name that maps to the same inode number. This is called “making a hard link” to a file. If an inode has only one name-number map (only one name), its link count is one.
Does a symbolic link get its own inode?
A symbolic link has its own inode number. When you create a symbolic link, you create a new physical file with its own inode number, as shown in Figure 1. Because a symbolic link refers to a file by its path name rather than by its inode number, a symbolic link can refer to files in other mounted file systems.
What are the usr, var, and etc folders?
The /var directory is the location for “variable” things like logs, running process ID pointer files, spool directories, and other things important for running services. The /usr/ directory is where user-accessible applications are generally located. Also a case of “by no means all”.
When to use / usr / local instead of / home?
If you’re installing someone else’s package, follow their recommendation. If you’re packaging something for a distribution (which you probably aren’t), use /usr. If your package isn’t system-integrated (e.g., what you build from source), your prefix is /usr/local instead of just /usr.
What’s the difference between / home and / usr?
If your package isn’t system-integrated (e.g., what you build from source), your prefix is /usr/local instead of just /usr. If you don’t have permissions to write outside of your $HOME, you can replicate bin, lib and share in $HOME/.local but most user-level package managers don’t follow this (in my experience).
Where do programs go in the usr / local folder?
There is also an “/opt” folder, where there are “other” programs usually put (mostly binary programs, or programs installed from other sources (not the default package manager). Some programs like that (usually compiled) also go to “/usr/local”