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MAN command for various shells

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Old 10-30-2013
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BTW, the bash-3 builtin test or [ ] has a buggy implementation (fixed in bash-4):
test -w and test -r call stat() rather than access(). That goes wrong
- if a file appears writable but the file system is mounted read-only
- a network file system like NFS or AFS, where the Server controls file access independent of the Unix permissions. Examples: NetApp NFS share on an NTFS-style volume; AFS with invisible ACLs.
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