Using at sign (@) in usernames linux. Is it safe?
136282
What characters should I use or not use in usernames on Linux?
14717
Extracting usernames from the /etc/passwd file
137096
What is the purpose of the '@' symbol in CSS?
55547
Typing at symbol (shift+2) displays double quote (") and Typing at symbol (shift+') attherate (@) in ubuntu 16.04
134554
What is the significance of the trailing dollar sign `$` on identifiers in SQL Server?
51375
Why would one limit username format?
152734
Using the literal '@' with a string variable
107307
Can I protect against SQL injection by escaping single-quote and surrounding user input with single-quotes?
101523
Why is using `<<-` frowned upon and how can I avoid it?
126300
What does the '@' mean in front of the repo name in `dnf list`?
55017
How do I show a message with username and date at login?
153914
Spurious @ symbol at start of bash prompt in Debian Jessie
58852
Using @ signs in comments without invoking comment replies?
71580
Change default username from "Unknown" to "User{number}"
150103
How can I retrieve an entry from /etc/passwd for a given username?
38677
Why do LaTeX internal commands have an @ in them?
116055
What does the @ symbol represent in objective-c?