Tried using "Magics" and can successfully run:
%%bash
echo "hello from $BASH"
which returns:
hello from /bin/bash
But running this:
%%bash
ssh -C -N <foo user>#<bar server> -L 3306:127.0.0.1:3306
does not permit running vanilla mysql query code against the tunnel connection. Am I trying to do the impossible?
Yes. So I have two options:
I can use the magic method of -
%%bash
ssh -C -N # -L 3306:127.0.0.1:3306
I can simply start the command with '!'
!ssh -C -N # -L 3306:127.0.0.1:3306
BUT - be sure the end the tunnel command with a ';' so that output is suppressed and IPython Notebook isn't waiting for the tunnel command to return something before executing your SQL. Example:
!ssh -C -N <foo user>#<bar server> -L 3306:127.0.0.1:3306;
Related
I'm getting incredibly frustrated here. I simply want to run a sudo command on a remote SSH connection and perform operations on the results I get locally in my script. I've looked around for close to an hour now and not seen anything related to that issue.
When I do:
#!/usr/bin/env bash
OUT=$(ssh username#host "command" 2>&1 )
echo $OUT
Then, I get the expected output in OUT.
Now, when I try to do a sudo command:
#!/usr/bin/env bash
OUT=$(ssh username#host "sudo command" 2>&1 )
echo $OUT
I get "sudo: no tty present and no askpass program specified". Fair enough, I'll use ssh -t.
#!/usr/bin/env bash
OUT=$(ssh -t username#host "sudo command" 2>&1 )
echo $OUT
Then, nothing happens. It hangs, never asking for the sudo password in my terminal. Note that this happens whether I send a sudo command or not, the ssh -t hangs, period.
Alright, let's forget the variable for now and just issue the ssh -t command.
#!/usr/bin/env bash
ssh -t username#host "sudo command" 2>&1
Then, well, it works no problem.
So the issue is that ssh -t inside a variable just doesn't do anything, but I can't figure out why or how to make it work for the life of me. Anyone with a suggestion?
If your script is rather concise, you could consider this:
#!/usr/bin/env bash
ssh -t username#host "sudo command" 2>&1 \
| ( \
read output
# do something with $output, e.g.
echo "$output"
)
For more information, consider this: https://stackoverflow.com/a/15170225/10470287
I am trying to run a nested ssh -t -t but it won't provide me the environment variables when working with cat and echo.
#!/bin/bash
pass="password\n"
bla="cat <(echo -e '$pass') - | sudo -S su -"
ssh -t -t -t -t jumpserver "ssh -t -t -t -t server \"$bla\" "
I get an output without any variables taken into consideration. (e.g. PS1 does not get shown but commands work fine) The problem is related to cat <(echo -e '$pass') - but this was the way to keep echo alive after providing the password for sudo.
How can i achieve this and get environment variables to get a proper output?
Thanks.
The -tt is enough. Using more -t does not add any more effect and just makes an impression that you have no idea what are you doing.
What is the point of cat <(echo -e) construction? Writing just echo would result in the same, isn't it?
Why to use sudo su? sudo already does all you need, isn't it?
So how can it look in some fashionable manner?
pass="password\n"
bla="echo '$pass' | sudo -Si"
ssh -tt jumpserver "ssh -tt server \"$bla\""
And does it work? Try to debug the commands with -vvv switches to the ssh. It will show you what is actually executed and passed to each other shell.
I have a script which starts an ssh-connection.
so the variable $ssh start the ssh connection.
so $SSH hostname gives the hostname of the host where I ssh to.
Now I try to echo something and copy the output of the echo to a file.
SSH="ssh -tt -i key.pem user#ec2-instance"
When I perform a manual ssh to the host and perform:
sudo sh -c "echo 'DEVS=/dev/xvdbb' >> /etc/sysconfig/docker-storage-setup"
it works.
But when I perform
${SSH} sudo sh -c "echo 'DEVS=/dev/xvdb' > /etc/sysconfig/docker-storage-setup"
it does not seem to work.
EDIT:
Also using tee is working fine after performing an ssh manually but does not seem to work after the ssh in the script.sh
The echo command after an ssh of the script is happening on my real host (from where I'm running the script, not the host where I'm performing an ssh to). So the file on my real host is being changed and not the file on my host where I've performed an ssh to.
The command passed to ssh will be executed by the remote shell, so you need to add one level of quoting:
${SSH} "sudo sh -c \"echo 'DEVS=/dev/xvdb' > /etc/sysconfig/docker-storage-setup\""
The only thing you really need on the server is the writing though, so if you don't have password prompts and such you can get rid of some of this nesting:
echo 'DEVS=/dev/xvdb' | $SSH 'sudo tee /etc/sysconfig/docker-storage-setup'
I am trying to run a sshpass command inside a bash script but it isn't working.
If I run the same command from the terminal it works fine but running it in a bash script it doesn't.
#! /bin/bash
sshpass -p 'password' ssh user#host command
I am aware of the security issues but its not important now.
Can someone help? Am I missing something.
Thanks
Try the "-o StrictHostKeyChecking=no" option to ssh("-o" being the flag that tells ssh that your are going to use an option). This accepts any incoming RSA key from your ssh connection, even if the key is not in the "known host" list.
sshpass -p 'password' ssh -o StrictHostKeyChecking=no user#host 'command'
Do which sshpass in your command line to get the absolute path to sshpass and replace it in the bash script.
You should also probably do the same with the command you are trying to run.
The problem might be that it is not finding it.
1 - You can script sshpass's ssh command like this:
#!/bin/bash
export SSHPASS=password
sshpass -e ssh -oBatchMode=no user#host
2 - You can script sshpass's sftp commandlike this:
#!/bin/bash
export SSHPASS=password
sshpass -e sftp -oBatchMode=no -b - user#host << !
put someFile
get anotherFile
bye
!
I didn't understand how the accepted answer answers the actual question of how to run any commands on the server after sshpass is given from within the bash script file. For that reason, I'm providing an answer.
After your provided script commands, execute additional commands like below:
sshpass -p 'password' ssh user#host "ls; whois google.com;" #or whichever commands you would like to use, for multiple commands provide a semicolon ; after the command
In your script:
#! /bin/bash
sshpass -p 'password' ssh user#host "ls; whois google.com;"
This worked for me:
#!/bin/bash
#Variables
FILELOCAL=/var/www/folder/$(date +'%Y%m%d_%H-%M-%S').csv
SFTPHOSTNAME="myHost.com"
SFTPUSERNAME="myUser"
SFTPPASSWORD="myPass"
FOLDER="myFolderIfNeeded"
FILEREMOTE="fileNameRemote"
#SFTP CONNECTION
sshpass -p $SFTPPASSWORD sftp $SFTPUSERNAME#$SFTPHOSTNAME << !
cd $FOLDER
get $FILEREMOTE $FILELOCAL
ls
bye
!
Probably you have to install sshpass:
sudo apt-get install sshpass
I want to run 2 different scripts from a single master shell script.
The first one uses the following command "rosh -n -l abcd" (It will log me in to the server with the user abcd and on the same shell I need to run the other script#2 and script#3 ...etc.)
Script#2- From there I need to change user using su - xyz and provide a password (it is fine if I can hardcode this in the file) (Script name is logintoServer)
Script#3- Run some script in the same shell to verify start of stop of server...
I have done the following but failed
I have one script which has rosh -n <servername> -l abcd /bin/sh -c "su - xyz" (I have to run this command in the same shell)
The below are the errors:
I am getting error while executing "standard in must be a tty"
I have tried to create 2 different scripts and run, but the problem is once the first script is run it does not run the 2nd script till I exit the script. (I need to run the 2nd script from the sub-shell created by the 1st script....)
I don't have rosh and I don't have a man page for rosh but a similar problem exists with ssh:
ssh localhost /bin/bash -c 'echo x' # (prints nothing)
ssh localhost "/bin/bash -c 'echo x'" # x
ssh localhost "/bin/bash -c 'tty'" # not a tty
ssh -t localhost "/bin/bash -c 'tty'" # /dev/pts/12\nConnection to localhost closed.
ssh localhost "/bin/bash -c 'su - $USER'" # su: must be run from a terminal
ssh -t localhost "/bin/bash -c 'su - $USER'"
the last asked for a password and then gave me a shell, so that would be 2 of 3 steps.
so one idea is to see if rosh has the -t option, too and the other is to enclose /bin/bash... with quotes, too (will require some escaping for the 3rd level).
What does rosh say with equivalent commands?
UPDATE
latest state:
rosh -n $host -l abcd -t "/bin/sh -c 'su - $user'"
Next I would save one step by saying /bin/su - xyz instead /bin/sh -c 'su - xyz', then you can use single quotes later, e.g.
rosh -n $host -l abcd -t "/bin/su - $user -c 'echo $PATH'"
this should print $PATH as seen by the echo command. Apparently it doesn't contain java. try man su, which java, man which.
su ... -c cmd runs cmd with the shell specified in /etc/passwd, so say </etc/passwd grep $user on the remote machine to find out which shell is used. if it's bash you can change $PATH in .bashrc or so, for other shells I don't know exactly.
Or specify an absolute path when launching java.
regarding password: with ssh I managed to use private key / public key and ssh-agent. For rosh I don't know if that works, too.