Insert a new line in a specific spot bash-CodePudding

So basically, I want to get a list of all users in a text file. First, I tried to ls the /home directory and output it to a file. But when I did this, It just put the users in a list like user1 user2 user3 user4 but I need the list like this:

user1
user2
user3
user4

So any help would be great! Thanks

CodePudding user response：

You can get a list of users directly from /etc/passwd by simply excluding the system accounts. You need to know what the UID_MIN and UID_MAX for your distribution. You can get that simply with, e.g.

$ grep '^UID_' /etc/login.defs
UID_MIN                  1000
UID_MAX                 60000

Now simply output the users from /etc/passwd (and optionally sort) excluding UIDs outside that range, e.g.

$ awk -F: '$3 >= 1000 && $3 <= 60000 { print $1 }' /etc/passwd | sort
alan
anna
darrell
david
deborah
dell
dmimms
drr
...

To save to a file, simply redirect the result to a filename of your choosing, e.g.

$ awk -F: '$3 >= 1000 && $3 <= 60000 { print $1 }' /etc/passwd | sort > filename

CodePudding user response：

you can try ls > filename.txt

CodePudding user response：

With bash's globbing (*):

cd /home/
printf "%s\n" * >file

Output to file:

user1
user2
user3
user4

See: help printf

CodePudding user response：

suggesting to use find command.

find /home -maxdepth 1 -mindepth 1 -type d -printf "%f\n"

Or better inspect those users who have a valid shell.

Not all users that have a shell have a home directory.

awk  -F: '/nologin$/{next}{print $1}' /etc/passwd