How to see what /bin/sh points to

If you need to programatically test if they are the same, you can use stat to query the inode of /bin/sh and compare with the inode of /bin/bash.

if [ $(stat -L -c %i /bin/sh) -eq $(stat -L -c %i /bin/bash) ]; then    .....fi

If you just need to see with your eyes if they are the same run the stat commands and see if they return the same inode number.

stat -L -c %i /bin/shstat -L -c %i /bin/bash

Since you are only searching through bin anyway, you can bypass find entirely and just check if sh and bash are hard links to the same file:

test /bin/sh -ef /bin/bash

OR

[ /bin/sh -ef /bin/bash ]

This is not as reliable as running find on all the possibilities, but it's a good start. While AIX find doesn't support -samefile, it does support -exec, which can be combined with the command above to simulate the same functionality:

find -L /bin -exec test /bin/sh -ef '{}' ';'

Check for GNU Bash

I'm going to answer your question in a different way, because it's actually simpler to find out if sh is GNU Bash (or something else that responds to a --version flag) than it is to chase inodes. There's also the edge case where the shell is renamed rather than linked, in which case mapping links won't really help you find an answer.

For example, to interrogate /bin/sh on macOS:

$ /bin/sh --versionGNU bash, version 3.2.57(1)-release (x86_64-apple-darwin16)Copyright (C) 2007 Free Software Foundation, Inc.

Alternatively, you can grep (or similar) for the string bash to capture the exit status. For example:

# Close stderr in case sh doesn't have a version flag.if sh --version 2>&- | grep -qF bash; then  echo "sh is bash"else  echo "sh isn't bash"fi

Of course, /bin/sh could be some other shell besides bash or the original bourne shell, but that's outside the scope of your original question. However, many shells such as ksh and tcsh also support the version flag, so judicious use of a case statement could help you extend the test to determine exactly which shell binary /bin/sh really is.