realpath

Print the resolved absolute file name; all but the last component must exist

-e, --canonicalize-existing

all components of the path must exist

-m, --canonicalize-missing

no path components need exist or be a directory

-L, --logical

resolve '..' components before symlinks

-P, --physical

resolve symlinks as encountered (default)

-q, --quiet

suppress most error messages

--relative-to=DIR

print the resolved path relative to DIR

--relative-base=DIR

print absolute paths unless paths below DIR

-s, --strip, --no-symlinks

don't expand symlinks

-z, --zero

end each output line with NUL, not newline

--help

display this help and exit

--version

output version information and exit

Written by Padraig Brady.

GNU coreutils online help: https://www.gnu.org/software/coreutils/
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