I want to check if I am using elevated user rights, like running su another_user and seeing my original user name / id.
All I found when researching that topic is either hardcode my own username somewhere, or examples for root user only (id=0).
I think zsh has a variable for that: $DEFAULT_USER, but it's not working in bash.
How can i generate a script that will open up the terminal, login to the local admin account using username and password then make the non-admin user an admin. Like this link where its done manually but i want it done using a script.
I'm not sure if the terminal will take a password or username from a script, if not could someone tell me? obviously the script wont be possible then.
I need to use sudo for some things, but I always get:
Password:
Sorry, try again.
Password:
sudo: 1 incorrect password attempt
I do not know why, the password is certainly correct, and whenever I am prompted to login as admin by other pieces of software with a GUI, everything works fine. It's only in the terminal that my pw is always rejected. Do I maybe somehow have to tell the system what the username of my admin account is, or anything like this?
Try
read a;echo $a
Need to check that password is actually written as typed.
Root might not have the right permission to connect to database based on that hostname or password .
Try this instead with user :
mysql -h your_host_name -p
Then put your password.
I'm working on a script in which I need to change the user, i have sudo access, i tried something like below but without success.
echo $passwd | sudo -S su - oracle
I even tried installed ssshpass but no success with that either. Is that even possible or do I need to install something else to make this work?
Any idea
If you will run your script with root account, you can just
message="The cake is a lie"
su username -c 'echo $message'
If you will run your script with another user you have two ways to do that,
1) Configuring pam like bellow so when you run su user2 -c 'command' logged with user1, linux will not ask for password.
Add the following lines right below the pam_rootok.so line in your /etc/pam.d/su:
auth [success=ignore default=1] pam_succeed_if.so user = user2
auth sufficient pam_succeed_if.so use_uid user = user1
The first line makes sure the target user is user2. If it is, the next line will take control and succeed authorization if the calling user is user1.
If the target user is something else, the second line will be ignored and the usual authentication steps will be performed.
2) Write your script using expect as here
I'm new to linux operating system and I've explored today the /etc/passwd file and to my surprise I found that it contains many other user names like proxy,daemon..etc.What are all these users?Can I login using these users?
Here the cat command i performed on /etc/passwd.
root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
bin:x:2:2:bin:/bin:/usr/sbin/nologin
sys:x:3:3:sys:/dev:/usr/sbin/nologin
sync:x:4:65534:sync:/bin:/bin/sync
games:x:5:60:games:/usr/games:/usr/sbin/nologin
man:x:6:12:man:/var/cache/man:/usr/sbin/nologin
lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin
mail:x:8:8:mail:/var/mail:/usr/sbin/nologin
news:x:9:9:news:/var/spool/news:/usr/sbin/nologin
uucp:x:10:10:uucp:/var/spool/uucp:/usr/sbin/nologin
proxy:x:13:13:proxy:/bin:/usr/sbin/nologin
www-data:x:33:33:www-data:/var/www:/usr/sbin/nologin
backup:x:34:34:backup:/var/backups:/usr/sbin/nologin
list:x:38:38:Mailing List Manager:/var/list:/usr/sbin/nologin
irc:x:39:39:ircd:/var/run/ircd:/usr/sbin/nologin
gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/usr/sbin/nologin
nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin
libuuid:x:100:101::/var/lib/libuuid:
syslog:x:101:104::/home/syslog:/bin/false
messagebus:x:102:106::/var/run/dbus:/bin/false
usbmux:x:103:46:usbmux daemon,,,:/home/usbmux:/bin/false
dnsmasq:x:104:65534:dnsmasq,,,:/var/lib/misc:/bin/false
avahi-autoipd:x:105:113:Avahi autoip daemon,,,:/var/lib/avahi-autoipd:/bin/false
kernoops:x:106:65534:Kernel Oops Tracking Daemon,,,:/:/bin/false
rtkit:x:107:114:RealtimeKit,,,:/proc:/bin/false
saned:x:108:115::/home/saned:/bin/false
whoopsie:x:109:116::/nonexistent:/bin/false
speech-dispatcher:x:110:29:Speech Dispatcher,,,:/var/run/speech-dispatcher:/bin/sh
avahi:x:111:117:Avahi mDNS daemon,,,:/var/run/avahi-daemon:/bin/false
lightdm:x:112:118:Light Display Manager:/var/lib/lightdm:/bin/false
colord:x:113:121:colord colour management
daemon,,,:/var/lib/colord:/bin/false
hplip:x:114:7:HPLIP system user,,,:/var/run/hplip:/bin/false
pulse:x:115:122:PulseAudio daemon,,,:/var/run/pulse:/bin/false
brucewilson:x:1000:1000:brucewilson,,,:/home/brucewilson:/bin/bash
mysql:x:116:125:MySQL Server,,,:/nonexistent:/bin/false
bharghav:x:1001:1001:bharghav,,,:/home/bharghav:/bin/bash
sshd:x:117:65534::/var/run/sshd:/usr/sbin/nologin
statd:x:118:65534::/var/lib/nfs:/bin/false
snmp:x:119:126::/var/lib/snmp:/bin/false
guest-MSvo95:x:120:127:Guest,,,:/tmp/guest-MSvo95:/bin/bash
Can anyone please explain what are these?
Most of those users are required by the OS processes to work. You can't login as one of those users because:
a. They don't have a shell as regular users does. For example, brucewilson has /bin/bash as shell, but pulse (Audio Controller ) has /bin/false.
b. There are not passwords for those users, so when the system asks for a password, no matter what you type you will never get in. You can check who has a password in /etc/shadow.
Actually, you can login as any user listed in /etc/passwd as of your choice.
for example, if you want to login as proxy, type the following command:
sudo -u proxy /bin/bash
It will asks password to authenticate the access, you can give your password only if your user account is added in sudoers list.
You can use the same command to login as any user in the /etc/passwd file.
For example, again if you want to log in as daemon, type the following command:
sudo -u daemon /bin/bash
and so on...
Hope this will help you.