what first output argument of ls -lin means-CodePudding

I have a test, where you need to find an identical file to the file ufx, and the answer would be the file htt. So the first argument is the same for those two files, and I don't know what do those numbers 100, 101, 102 mean?

You can have this result by typing in terminal $ls –lin

 100 -rw-r--r-- X usr1 group 38 2011-02-26 06:35 ufx

 101 -rw-r--r-- X usr1 group 38 2011-02-26 06:35 yaw

 101 -rw-r--r-- X usr1 group 38 2011-02-26 06:35 nuj

 100 -rw-r--r-- X usr1 group 38 2011-02-26 06:35 htt

 101 -rw-r--r-- X usr1 group 38 2011-02-26 06:35 xpa

 102 -rw-r--r-- X usr1 group 38 2011-02-26 06:35 tjp

CodePudding user response：

The man page states this under -i:

   -i, --inode
          print the index number of each file

The inode is a filesystem index to file/directory table of that file system. Read more about it in https://en.wikipedia.org/wiki/Inode