Introduction: Linux / Mac Troubleshoot or Howto Create a Install Script by Following the History of the System / Trouble Shoot (Oh Sh*t, I Did a Mess)

By www.olafover.de
About: Meister, Robotics Service-Engineer for Kuka and DJ/Producer.

instructables is also quite good to save personal notes - I've seen... So I do.

My Raspberry-Pi however stopped all it's operations via WIFI somehow. I guess I installed some messy configuration like a DNS server or something, by accident - or I forgot to configure other stuff.


Also during a fresh install and reinstall - you probably don't like to retype all commands at once, or you like to turn your last command sequence or all apt-get's you do in shell into a bash-script.

Step 1: Command : History

Autocomplete Function (Win,MAC,Linux)
first, when typing commands in shell, you may try to write some chars and press the tab key. This works also on directories. It even works in Windows CMD !

I can not remember ... it was yesterday... what I have done on the system
dont panic, just use the history command: 

root@pi2:/home/olaf# history
   32  find . -print0 | grep -FzZ "wikimedia"
   33  mount -a
   34  ls
   35  cd /var/log
   36  ls

to filter for special commands like installations:

history | grep apt-get

to filter for things where I had my fingers in it:

history | grep nano

and to check - if I already did download this GIT repository e.g. for Roundcube

root@pi2:/home/olaf# history | grep Roundcube
   323  git clone  https://github.com/JohnDoh/Roundcube-Plugin-Sieve...
  324  mv Roundcube-Plugin-SieveRules-Managesieve managesieve

  488  mv Roundcube-Plugin-SieveRules-Managesieve managesieve
  490  cp Roundcube-Plugin-SieveRules-Mana
Step 2: Create a Install Script
Thus we know about the history command now, we can easily turn our history into a installation file.
history | grep apt-get > myfilename.sh
The  >>>  |  <<<<<  you get on MAC by pressing ALT+7
The " > "  will guide the output not to the screen, but into a file called "myfilename.sh". We need to open our file and remove all numbers (as seen on the photo):
nano myfilename.sh

then in the first line of the file insert the shebang:
#!/bin/bash

Exit with CTRL+X
chmod and chown on your personal needs. 
Step 3: Add Some Files to Your New Install Script, If Needed
you can easily add config commands to your file:
root@pi2:/home/olaf# echo mycommand > myfilename.sh<br>
show the modification - and do not forget to move inside your editor the commands to the right position! 
root@pi2:/home/olaf# tail myfilename.sh

mycommand