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Top Forums UNIX for Dummies Questions & Answers Unix user ID's case-sensitive? Post 45018 by Neo on Saturday 13th of December 2003 10:13:19 PM
Old 12-13-2003
No, for example, sending mail to Neo, NEO, neO or neo, etc. will all reach the same mailbox. If mail was rejected because the case didn't match, lots of mail would be rejected Smilie

Having said that, the acounts in the password file are case sensitive. So Root is not the same as root, is not the same as ROOT. For example, if the password file says 'neo' you cannot su to Neo.
Code:
www# su Neo
Unknown id: Neo

I would have to test to see if there were accounts "neo" and also "Neo" in the password file if mail would find it's way to the right mailbox...... anyone?

Neo
 

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MAIL(1) 						      General Commands Manual							   MAIL(1)

NAME
mail - send or receive mail among users SYNOPSIS
mail person ... mail [ -r ] [ -q ] [ -p ] [ -f file ] DESCRIPTION
Mail with no argument prints a user's mail, message-by-message, in last-in, first-out order; the optional argument -r causes first-in, first-out order. If the -p flag is given, the mail is printed with no questions asked; otherwise, for each message, mail reads a line from the standard input to direct disposition of the message. newline Go on to next message. d Delete message and go on to the next. p Print message again. - Go back to previous message. s [ file ] ... Save the message in the named files (`mbox' default). w [ file ] ... Save the message, without a header, in the named files (`mbox' default). m [ person ] ... Mail the message to the named persons (yourself is default). EOT (control-D) Put unexamined mail back in the mailbox and stop. q Same as EOT. x Exit, without changing the mailbox file. !command Escape to the Shell to do command. ? Print a command summary. An interrupt stops the printing of the current letter. The optional argument -q causes mail to exit after interrupts without changing the mailbox. When persons are named, mail takes the standard input up to an end-of-file (or a line with just `.') and adds it to each person's `mail' file. The message is preceded by the sender's name and a postmark. Lines that look like postmarks are prepended with `>'. A person is usually a user name recognized by login(1). To denote a recipient on a remote system, prefix person by the system name and exclamation mark (see uucp(1)). The -f option causes the named file, e.g. `mbox', to be printed as if it were the mail file. Each user owns his own mailbox, which is by default generally readable but not writable. The command does not delete an empty mailbox nor change its mode, so a user may make it unreadable if desired. When a user logs in he is informed of the presence of mail. FILES
/usr/spool/mail/* mailboxes /etc/passwd to identify sender and locate persons mbox saved mail /tmp/ma* temp file dead.letter unmailable text uux(1) SEE ALSO
xsend(1), write(1), uucp(1) BUGS
There is a locking mechanism intended to prevent two senders from accessing the same mailbox, but it is not perfect and races are possible. MAIL(1)
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