https://community.hpe.com/t5/operating-system-linux/username-limitations/m-p/5002568#M47739 Probably, you should consider the use of a Directory Service, like Red Hat Directory Services. <BR /><BR />Login names can contain alphanumeric, -, and _. Maximum length is 256. Mon, 11 Sep 2006 15:53:59 GMT Ivan Ferreira 2006-09-11T15:53:59Z https://community.hpe.com/t5/operating-system-linux/username-limitations/m-p/5002567#M47738 We are currently in the early stages of looking at moving to Linux. Can someone tell me what the limitations are for usernames in linux. Specifically things like length and special chars allowed.<BR /><BR />P.S. We are looking at RedHat, I am not sure if it would be different for other implementations or not.<BR /><BR /><BR />Thank you for your help. Mon, 11 Sep 2006 15:36:21 GMT https://community.hpe.com/t5/operating-system-linux/username-limitations/m-p/5002567#M47738 Mike Smith_33 2006-09-11T15:36:21Z https://community.hpe.com/t5/operating-system-linux/username-limitations/m-p/5002568#M47739 Probably, you should consider the use of a Directory Service, like Red Hat Directory Services. <BR /><BR />Login names can contain alphanumeric, -, and _. Maximum length is 256. Mon, 11 Sep 2006 15:53:59 GMT https://community.hpe.com/t5/operating-system-linux/username-limitations/m-p/5002568#M47739 Ivan Ferreira 2006-09-11T15:53:59Z https://community.hpe.com/t5/operating-system-linux/username-limitations/m-p/5002569#M47740 Thanks for the information Ivan. It is appreciated. Mon, 11 Sep 2006 16:07:51 GMT https://community.hpe.com/t5/operating-system-linux/username-limitations/m-p/5002569#M47740 Mike Smith_33 2006-09-11T16:07:51Z