Shell-script - How to fetch user details form etc passwd file, Get user details in argument or variable

How to fetch user details form etc passwd file

Many of my friends have asked me how to fetch the user details in each variable or field? They have said its required to use according to their different use. Some had said it was necessary when the need to user name and user details of their server. And other requirement line to create a same userlist as same as the old server.

while read line
do
  
  user_name="$(echo $line | cut -d: -f1)"
  user_id="$(echo $line | cut -d: -f3)"
  user_details="$(echo $line | cut -d: -f5 )"
  user_dir="$(echo $line | cut -d: -f6 )"
  echo "User Name = $user_name" 
  echo "User Id = $user_id"
  echo "User Details = $user_details"
  echo "User Home Directory = $user_dir"
  echo "--------------------------------------"

done</etc/passwd

In the above script the /etc/passwd is passwd as the input file and each line is parsed using cut command and stored in the varilables. In later section we can see how to use these variables, you can use these variables for different use and which we will see other section.


Sample output:

User Name = rpc
User Id = 32
User Details = Rpcbind Daemon
User Home Directory = /var/lib/rpcbind
--------------------------------------
User Name = rpcuser
User Id = 29
User Details = RPC Service User
User Home Directory = /var/lib/nfs
--------------------------------------
User Name = nfsnobody
User Id = 65534
User Details = Anonymous NFS User
User Home Directory = /var/lib/nfs
--------------------------------------

The topic on Shell-script - How to fetch user details form etc passwd file is posted by - Marc

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