Shell script of the common user actions

Bulk create 10 oldboy01-oldboy10 system accounts and set a password, the password is a random string of 8

#!/bin/bash
for user in oldboy{01..10}
 do
  useradd $user
  echo `date "+%N" | md5sum  | tr -d [0-9] | head -c 8` | passwd --stdin $user
  sleep 1
 done

 

10 bulk delete system accounts oldboy01-oldboy10

#!/bin/bash
for user in oldboy{01..10}
  do
  userdel -r $user
  done

 

Add users in a given user name, and modify it in accordance with the given password

#! / bin / bash 
# own user file can be created manually, automatically generated here with my command 
echo  "" > / SRV / Script / username
 sed -i ' 1i \ 
devops1 \ 
devops2 \ 
devepment1 \ 
devepment2 ' / SRV / Script / username 
sed -i ' / ^ $ / d ' / SRV / Script / username 

# I now manually generate the password file 
cp -a / SRV / Script / username / SRV / Script / passwd 
sed -i ' 1, $ S /.* / &: & / ' / SRV / Script / passwd 

# batch create user 
for the user in $ ( CAT / SRV / Script /username)
  do 
  the useradd $ User 
 DONE 

# Change Password command 
the chpasswd </ SRV / Script / the passwd

 

chpasswd batch modify user password

　　Read input user's name and password from the standard system, and use this information to update the user's presence on the system password

 

format

 

echo Username: Password | chpasswd 
chpasswd <doiido.txt

 

 

parameter

-e: If the -e option, the password will only be passed in encrypted form, if the -e option is not used, the password will be passed as plaintext

 

Delete user accounts in accordance with the given user name

for user in $(cat /srv/script/username); 
  do  
    userdel -r $user 
  done