tobinharris.com

Note, I’m using Debian Sarge 3.1

Groups and Users

Being a bit of a Linux amateur, here’s some useful pointers for creating linux users.

Listing Existing Groups

more /etc/group

Listing Groups a User Is In

groups someuser

Changing Groups for a User

usermod -Gsys,adm,users -L someuser

Adding Group

groupadd customers

Allowing Group to Read/Write Files In Folder

chgrp -R somegroup somedir/
chmod -R g+rw somedir/

When wanting to allow people to CRUD files in a folder, 777 is a common one to use!?

chmod -R 777 somedir/

Adding Some Users

useradd -gusers -pxxxxx -s/bin/bash -Gcustomers someuser

or

useradd -gusers -pxxxxx -s/bin/bash -Groot someadmin

Changing Someones Password

passwd someuser

SSH Troubleshooting

If users can’t get in, then might be useful to look here:

pico /etc/pam.d/ssh

Also, sshing in from the actual host that you’d want remote access to. This is good to check tha the account is working and the password is as expected.

Showing version

cat /etc/issue 
cat /proc/version