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what is "Asterisk PBX represent and what is last asterisk represent. If i interpret it i think it means
add user then what is -c option and Asterisk PBX? i don't know. -d represent directory /var/lib/asterisk but then what this last asterisk represent(i.e., after space)
And also please tell me what it's impact in the current directory.Means if i am executing it in the directory say
[root@localhost asterisk-126.96.36.199]# useradd -c "Asterisk PBX" -d /var/lib/asterisk asterisk
yes...by default users will be created in the /home directory. (If you didnt edit the file /etc/default/useradd and the uid and gid is set through /etc/login.defs file). But you can specify the path of the user's home directory while creating the user with the "d" option.