Question

When adding several user accounts, you might want to use the newusers utility, which can process a text file full of entries to add user accounts. Use the man or info page to find out how to use this utility, and use it to add three users. When finished, view the /etc/passwd, /etc/shadow, and /etc/group files to verify that the users were added successfully.

Answer 1

Syntax
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<Username>:<Password>:<UID>:<GID>:<User Info>:<Home Dir>:<Default Shell>

Username: User login name
Password: User password
UID: User Identifier
GID: Group Identifier for user’s primary group
User Info: User information like full name, contact information etc.
Home Dir: User’s home directory
Default Shell: User’s default shell

# cat /root/users.txt
test1:test1@123:600:1530:Test User1,[email protected]:/home/tester1:/bin/bash
test2:test2@123:601:1529:::/bin/bash
test3:test3@123:::::

# newusers /root/users.txt

# cat /etc/passwd | grep tester
test1:x:600:1530:Test User1,[email protected]:/home/tester1:/bin/bash
test2:x:601:1529:::/bin/bash
test3:x:65537:65538:::

# cat /etc/group | grep tester
devel:x:1529:test2
test1:x:1530:test1
test3:x:65538:test3

# cat /etc/shadow | grep tester
test1:$1$NK0LH/kL$.gy3tBXHUlsapiHPlPKs21:15607:0:99999:7:::
test2:$1$NK0LH/kL$08Y4VdiOY4TTms.UCjjoE1:15607:0:99999:7:::
test3:$1$NK0LH/kL$OkaRrrsm51tW3j5yheD7q1:15607:0:99999:7:::

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