I want to create Unicode logins for *Unix flavor OS, when i use useradd like below, I got that user name is invalid
[root@mail ~]# useradd ياسين
useradd: invalid user name 'ياسين
Check your systems documentation on what usernames are allowed. Eg.:
man useradd
On my Debian 10 in the section CAVEATS there I read this:
It is usually recommended to only use usernames that begin with a lower case letter or an underscore, followed by lower case letters, digits, underscores, or dashes. They can end with a dollar sign. In regular expression terms: [a-z_][a-z0-9_-]*[$]?
On Debian, the only constraints are that usernames must neither start with a dash ('-') nor plus ('+') nor tilde ('~') nor contain a colon (':'), a comma (','), or a whitespace (space: ' ', end of line: '\n', tabulation: '\t', etc.). Note that using a slash ('/') may break the default algorithm for the definition of the user's home directory.
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I'm on linux mint, have the same section on man useradd, and I could create the user. – schrodigerscatcuriosity Oct 11 '19 at 21:13
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@guillermochamorro Interesting. I've not tested on mine, just giving a hint. – user147505 Oct 11 '19 at 21:14
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That is why I am asking how to create Unicode user not ASCII user !! – Eng .. Abdalmonem Oct 11 '19 at 22:09
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@Eng..Abdalmonem If your system doesn't allow it then you can't. – user147505 Oct 12 '19 at 9:34
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useradd -m yaseenand then edit the user name back to 'ياسين' inside/etc/passwdwithvipw(just tried it centos7 -- whereuseraddrejects any non-ascii lowercase usernames).ssh,su,passwdshould have no trouble dealing with the username afterwards. – mosvy Oct 13 '19 at 7:33