How can I find the user on Ubuntu (Shell/Bash)

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I want to create a system that should interactively find the user and then say whether it exists or not. I must provide the username and if the user is found then the system has found the username and enters, if it does not say that there was an error

I need to do something like that (in pseudo-code):

erro<-"O utilizador nao foi encontrado"
escreve ("Introduza nome de utilizador")
lê nome
se (nome==encontrado)
{
  ... entra no sistema
}
senao
{
     escreve ($erro)
}

in Bash on Linux Ubuntu:

#!/bin/bash
erro="Utilizador não encontrado"
echo "Qual o utilizador que pretende encontrar?"
read user

if[user  (encontrado)]#duvida
{
   ....
}
else
{
   echo $erro
}
fi
linux shell bash cmd

  • Where will be the "database" of users? You intend to use the /etc/passwd and validate whether the user/users exists inside or will have another user base?

1 answer

0


The correct script can be run this way, preferably as root

#!/bin/bash
erro="Utilizador não encontrado"
echo "Qual o utilizador que pretende encontrar?"
read user
if [ `cat /etc/passwd | cut -d \: -f1 | grep $user`  ] ; then
....
else
echo $erro
fi

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