My issue is that I want run a script from root for which I always have to login with root manually by typing "su -" on command line.
My query is that the script which I am executing it automatically login with root by just prompting me for password. Help me!!!
::::::::::Script:::::::::::::
if [ "$(whoami)" != "root" ]; then
echo -e '\E[41m'"\033[1mYou must be root to run this script\033[0m"
**su - # at this line I want to login as root but it is not working**
exit 1
fi
sleep 1
if [ "$(pwd)" != "/root" ]; then
echo -e '\E[41m'"\033[1mCopy this script to /root & then try again\033[0m"
cd /root
exit 1
fi
sleep 1
echo -e '\E[36;45m'"\033[1mDownloading Flash Player from ftp.etilizepak.com\033[0m"
sleep 2
wget -vcxr ftp://soft:S0ft\!#ftp.abc.com/ubuntu/ubuntu\ 12.04/adobe-flashplugin=/install_flash_player_11_linux.i386.tar.gz
cd ftp.abc.com/ubuntu/ubuntu\ 12.04/adobe-flashplugin/
sleep 1
echo -e '\E[42m'"\033[1mUnzipping .tar File...\033[0m"
sleep 1
tar -xzf install_flash_player_11_linux.i386.tar.gz
echo "Unzipping Compeleted"
sleep 2
echo -e '\E[42m'"\033[1mCopying libflashplayer.so\033[0m"
cp libflashplayer.so /usr/lib/mozilla/plugins/
:::::::::::::::END:::::::::::::::::::::
I'm not sure if I understand your question but I suppose you want to run something inside you script with root privileges - then you shuold use "sudo" command.
You can also suppress the password prompt, this can be configured in sudoers" configuration file.
Some more info here:
https://unix.stackexchange.com/questions/35338/su-vs-sudo-s-vs-sudo-bash
Shell script calls sudo; how do I suppress the password prompt
There is tons of examples, google something like "linux sudo examples" and you will get lots of examples how to use su, sudo ans sudoers commands.
According to your comments to my previous answer, here is how i do it:
There are two files in the same directory:
-rwx------ 1 root root 19 Sep 10 13:04 test2.sh
-rwxrwxrwx 1 root root 29 Sep 10 13:06 test.sh
File test.sh:
#!/bin/bash
# put your message here
su -c ./test2.sh
File test2.sh:
#!/bin/bash
echo You run as:
whoami
# put your code here
Result:
> ./test.sh
Password:****
You run as:
root
If you want to suppress the password prompt for this script only, replace "su -c" with "sudo" and configure sudoers file according to insctructions from here: https://askubuntu.com/questions/155791/how-do-i-sudo-a-command-in-a-script-without-being-asked-for-a-password
Related
I'm using password-less key based login with sudo to execute remote commands. I have figured out that I have to spawn a new shell to execute commands that write to root areas of the remote file system. But, I would like a clear explanation of exactly why this is the case?
This fails:
sudo -u joe ssh example.com "sudo echo test > /root/echo_test"
with:
bash: /root/echo_test: Permission denied
This works fine:
sudo -u joe ssh example.com "sudo bash -c 'echo test > /root/echo_test'"
It's the same reason that a local sudo echo test >/root/echo_test will fail (if you are not root) -- the redirection is done by the shell (not the sudo or echo command) which is running as the normal user. sudo only runs the echo command as root.
With sudo -u joe ssh example.com "sudo echo test > /root/echo_test", the remote shell is running as a normal user (probably joe) and does not have permission to write to the file. Using an extra bash invokation works, because sudo then runs bash as root (rather than echo), and that bash can open the file and do the redirect.
My problem is that I have a cluster-server with Torque PBS and want to use it to run a sequence-comparison with the program rapsearch.
The normal RapSearch command is:
./rapsearch -q protein.fasta -d database -o output -e 0.001 -v 10 -x t -z 32
Now I want to run it with 2 nodes on the cluster-server.
I've tried with: echo "./rapsearch -q protein.fasta -d database -o output -e 0.001 -v 10 -x t -z 32" | qsub -l nodes=2 but nothing happened.
Do you have any suggestions? Where I'm wrong? Help please.
Standard output (and error output) files are placed in your home directory by default; take a look. You are looking for a file named STDIN.e[numbers], it will contain the error message.
However, I see that you're using ./rapsearch but are not really being explicit about what directory you're in. Your problem is therefore probably a matter of changing directory into the directory that you submitted from. When your terminal is in the directory of the rapsearch executable, try echo "cd \$PBS_O_WORKDIR && ./rapsearch [arguments]" | qsub [arguments] to submit your job to the cluster.
Other tips:
You could add rapsearch to your path if you use it often. Then you can use it like a regular command anywhere. It's a matter of adding the line export PATH=/full/path/to/rapsearch/bin:$PATH to your .bashrc file.
Create a submission script for use with qsub. Here is a good example.
I am doing this using fabric (python):
Login as root to a brand new Centos 6.5 box from linode.com
Run the following script
The script:
#!/bin/bash
yum -y update
adduser shortfellow
echo "shortfellow ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
echo 'Defaults:shortfellow !requiretty' >> /etc/sudoers
/sbin/mkhomedir_helper shortfellow
mkdir -p /home/shortfellow/.ssh
echo "<my ssh public key>" >> /home/shortfellow/.ssh/authorized_keys
chmod -R 700 /home/shortfellow/.ssh
chown -R shortfellow:shortfellow /home/shortfellow/.ssh
su - shortfellow
exit
The problem:
I can not log into the server with the new server with given username(shortfellow) for a few attempts. I have added ssh keys to ssh-agent. It works after I try to login multiple times, but I can not understand why that would be the case.
Any help is appreciated.
You might want to use single quotes when echoing things like ssh keys. If there are any special characters that would be bash variables or similar they could be being expanded.
I've developed an application where I need to run some script under root. Also sh script contains "sudo" commands. For running sh script under root I use STPrivilegedTask class from github:
https://github.com/sveinbjornt/STPrivilegedTask
Here how I run a script:
NSString *scriptPath = [[NSBundle mainBundle] pathForResource:#"my_script" ofType:#"sh"];
STPrivilegedTask *task = [[STPrivilegedTask alloc] initWithLaunchPath:scriptPath];
int result = [task launch]; // return error 60031 which means:
//errAuthorizationToolExecuteFailure = -60031, /* The specified program could not be executed. */
And here is a script I use:
#!/bin/bash
sudo mkdir -p /usr/local/myfolder
sudo su - root -c "launchctl load -F /System/Library/LaunchDaemons/com.mydaemon.daemon.plist"
I use OS X Mavericks 10.9.4
EDIT:
After I set "chmod +x my_script.sh" for script it runs script. But now I receive next errors in console:
sudo: no tty present and no askpass program specified
sudo: no tty present and no askpass program specified
Seems that my admin credentials I put didn't applied with script I run. Any ideas how to fix that?
Here are two solutions taken in part from this stackexchange thread, which I can't test because I do not currently own a mac.
Solution 1: Use OSAScript to run the command in the first place
#!/bin/bash
sudo mkdir -p /usr/local/myfolder
osascript -e "do shell script \"mkdir -p /usr/local/myfolder\" with administrator privileges"
osascript -e "do shell script \"launchctl load -F /System/Library/LaunchDaemons/com.mydaemon.daemon.plist\" with administrator privileges"
Solution 2: Use OSAScript to prompt for a password and use that with sudo
#!/bin/bash
pw = "$(osascript -e 'Tell application "System Events" to display dialog "Password:" default answer "" with hidden answer' -e 'text returned of result' 2>/dev/null)"
echo $pw | sudo -S mkdir -p /usr/local/myfolder
echo $pw | sudo -S su - root -c "launchctl load -F /System/Library/LaunchDaemons/com.mydaemon.daemon.plist"
If you're using STPrivilegedTask properly, then the script should already be running with root privileges so the sudo commands are actually not needed in that case.
You should use something akin to:
sudo=
[[ $(id -u) != 0 ]] && sudo=sudo
$sudo <command that would need sudo>
which should prevent the errors about not having a tty, which are related to invoking the sudo command in a GUI application.
Is there a way to execute a command before accessing a remote terminal
When I enter this command:
bash
$> ssh user#server.com 'ls'
The ls command is executed on the remote computer but ssh quits and I cannot continue in my remote session.
Is there a way of keeping the connection? The reason that I am asking this is that I want to create a setup for ssh session without having to modify the remote .bashrc file.
I would force the allocation of a pseudo tty and then run bash after the ls command:
syzdek#host1$ ssh -t host2.example.com 'ls -l /dev/null; bash'
-rwxrwxrwx 1 root other 27 Apr 1 2005 /dev/null
bash-4.1$
You can try using process subsitution on the init file of bash. In the example below, I define a function myfunc:
myfunc () {
echo "Running myfunc"
}
which I transform to a properly-escaped one-liner echoed in the <(...) construct for process subsitution for the --init-file argument of bash:
$ ssh -t localhost 'bash --init-file <( echo "myfunc() { echo \"Running myfunc\" ; }" ) '
Password:
bash-3.2$ myfunc
Running myfunc
bash-3.2$ exit
Note that once connected, my .bashrc is not sourced but myfunc is defined and properly usable in an interactive session.
It might prove a little difficult for more complex bash functions, but it works.