Ask HN: I can´t start up my Macbook by a bash upgrade

1 point·wakarnaker··7 comments

I was upgrading bash for patching the shellshock vulnerability, so i follow a tutorial and i guess i messed up by replacing the old bin/bash $PATH and removing the execute permissions... HELP ME!!!

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The tutorial says: If you are very paranoid, you can remove execute permissions on the bash_old ....

$ sudo chmod a-x /bin/bash_old /bin/sh_old.... ------

I think this is the big mistake, so i replace the old PATH to new PATH with the new bash update (Upgraded with Homebrew) by following the steps:

$ sudo ln -s /usr/local/Cellar/bash/4.3.25/bin/bash /bin/bash

$ sudo ln -s /usr/local/Cellar/bash/4.3.25/bin/bash /bin/sh

When I restarted the macbook, i set my password and nothing happens, loading...loading...loading....nothing happens.

Here the tutorial:

https://apple.stackexchange.com/questions/147005/can-bash-be...

Does this help?

https://news.ycombinator.com/item?id=8387525

> Word of warning, if you have chmod 0000 /bin/bash put it back to how you found it before running the update.

> If you didn't do this: cmd + s to boot in safe mode. /sbin/mount -wu / and chmod bash back to a useable state, if you get stuck at log in.

yeah.. i did it, cmd + s as single user with all those tips, then i restarted and nothing happen.

You will have to boot in rescue mode or from a DVD, and use Terminal.app to correct the situation.

oh my.... i ain´t got that DVD

hold down command+r when booting, you don't need that DVD, the recovery partition is on the disk already. you should be able to launch a terminal from there and fix your problem.

I will try in terminal mode

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