/etc/shells is a text file which contains the full pathnames of valid
login shells. This file is consulted by chsh(1) and available to be
queried by other programs.
Be aware that there are programs which consult this file to find out if
a user is a normal user; for example, FTP daemons traditionally disal-
low access to users with shells not included in this file.
/etc/shells may contain the following paths:
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