Answers: linux - Entering Password in su- through loop

dhruv

The Scenario is like I have a list of root passwords. But i don't want to keep trying Manually. So i wrote the shell script :

for i in {1..26}

do

su - >>result

done

and all my password are on a file "attempt.txt".

Now on Command Prompt i type the Command :

bash p2.sh < attempt.txt

But It shows errors : "Standard in must be a tty"

So is there some way I can enter these passwords through some codes or commands without manually typing each Of those? Please tell a command-line approach instead of some advanced utility software. I'm in it for learning. Thanks :)

MariusMatutiae

The correct syntax is this:

 while read my_pass
 do 
        echo $my_pass | sudo -S command
 done < file_name

Three comments: you cannot use su inside a script file, you will need to use sudo with the -S option which, according to the man,

The -S (stdin) option causes sudo to read the password from the standard input instead of the terminal device.

Second, if you do not like to write the file_name inside the script, use one of the $n arguments, like $1 if it is the only parameter passed.

Third, are you sure collecting all of your passwords in a single, unencrypted file is such a good idea?

linux - Looping Through Subdirectories and Running a Command in Each

linux bash shell script

Bryan Veloso

I have a set of repositories sorted into directories based on their VCS (Git, Mercurial, SVN). With Subversion I was able to run svn update * in the parent directory and it would loop through each directory and update each repository as expected. That's not the case for Git or Mercurial.

I would like to come up with a bash script that I can run to do exactly that, loop through directories and either git pull or hg pull in each. I just don't have much bash scripting experience.

Related Answers

slhck

for dir in ~/projects/git/*; do (cd "$dir" && git pull); done

theprivileges

If you need it to be recursive:

find . -type d -name .git -exec sh -c "cd \"{}\"/../ && pwd && git pull" \;

This will descend into all the directories under the current one, and perform a git pull on those subdirectories that have a .git directory (you can limit it with -maxdepth).

Ole Tange

If you have GNU Parallel http:// www.gnu.org/software/parallel/ installed you can do this:

cd ~/projects/git/; ls | parallel 'cd {} && git pull'

This will run in parallel so if some of the git servers' network connection are slow this may speed up things.

Watch the intro video for GNU Parallel to learn more: http://www.youtube.com/watch?v=OpaiGYxkSuQ

slhck

This should work

find . -maxdepth 1 -type d -name '.git' -exec sh -c 'cd "{}" && pwd && git pull' \;

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linux - Entering Password in su- through loop