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shell_tips:adding_multiple_users

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1. Example of how to add 50 users

for usernum in {1..50}; do  useradd -m user$usernum; done

This will create 50 users without password

2. You can generate passwords from the usernames

for usernum in {1..50}; do  useradd -m user$i; echo  "user$usernum" | passwd --stdin user$usernum; done

3. You can also generate random passwords

for usernum in {1..50}; do  echo  `</dev/urandom tr -dc a-z | head -c 10`|passwd --stdin user$usernum ;done

4. Add users with passwords, assign to sshd group, and copy a similar .bashrc to each home folder

for usernum in {1..50}; do  useradd -m user$usernum; echo  "user$usernum" | passwd --stdin user$usernum; gpasswd -a "user$usernum" sshd; /bin/cp -f  /home/user/.bashrc /home/"user$usernum";done

With random passwords

for usernum in {1..50}; do  useradd -m user$usernum;  echo `</dev/urandom tr -dc a-z | head -c 10`|passwd --stdin user$usernum ; gpasswd -a "user$usernum" sshd; /bin/cp -f  /home/user/.bashrc /home/"user$usernum";done

Note we have used /bin/cp to escape cp alias in bash; this is usually on Centos

shell_tips/adding_multiple_users.1344947703.txt.gz · Last modified: 2012/08/14 12:35 by ikahugu