pfiles and pstack and ptree

Linux and Unix-Like Red Hat
1

Can someone tell me the Linux equivalent for pstack and pfiles and ptree which are Solaris commands.

2

for all those interested the equivalents are:

ptree -> pstree
pfiles -> lsof -a -p <pid>
pstack -> pstack
truss -> strace

both pstack and strace are packages and need to be installed by rpm and pstack is compatable with REHL 5 and somewhat questionable results when installed on REHL 4

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