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I know how to list all packages installed on my system.

But how could I get a list of all repositories and PPA's?

I know I can look into /etc/apt/sources.list and /etc/apt/sources.list.d, but I'm looking for a way to generate a script that executes all apt-add-repository commands on a new system (that sorts out getting all keys).

Any ideas?

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Possible duplicate: askubuntu.com/questions/28644/how-can-i-backup-my-ppas –  Glutanimate Aug 31 '13 at 11:03
Actually a superset. My question was about a script that generates the restore script, not just backup –  stwissel Sep 1 '13 at 12:19

4 Answers 4

You can show everything with:

grep ^ /etc/apt/sources.list /etc/apt/sources.list.d/*
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What about egrep -v '^#|^ *$' /etc/apt/sources.list /etc/apt/sources.list.d/* to remove lines commented out and blank lines? –  user25656 Jun 10 '12 at 13:22
could you please explain the use of ^ after grep in grep ^ /etc/apt/sources.list /etc/apt/sources.list.d/*? –  user25656 Jun 10 '12 at 13:25
@vasa1 The caret ^ and the dollar sign $ are metacharacters that respectively match the empty string at the beginning and end of a line. –  wojox Jun 11 '12 at 14:22
wojox, @vasa1: thx for the contribution. It helped to get clarity how to sort this out. –  stwissel Jun 12 '12 at 11:30
I use grep ^[^#] ... -- It auto-hides all commented-out sources –  Ross Aiken Oct 30 '13 at 22:36
up vote 35 down vote accepted

Thanks for the pointers. With a little cleanup I got a script that lists the PPAs, but not any other repository:

#! /bin/sh 
# listppa Script to get all the PPA installed on a system ready to share for reininstall
for APT in `find /etc/apt/ -name \*.list`; do
    grep -o "^deb http://ppa.launchpad.net/[a-z0-9\-]\+/[a-z0-9\-]\+" $APT | while read ENTRY ; do
        USER=`echo $ENTRY | cut -d/ -f4`
        PPA=`echo $ENTRY | cut -d/ -f5`
        echo sudo apt-add-repository ppa:$USER/$PPA

When you call it with listppa > installppa.sh you get a script you can copy on a new machine to reinstall all PPA.

Next stop: do that for the other repositories:

#! /bin/sh
# Script to get all the PPA installed on a system
for APT in `find /etc/apt/ -name \*.list`; do
    grep -Po "(?<=^deb\s).*?(?=#|$)" $APT | while read ENTRY ; do
        HOST=`echo $ENTRY | cut -d/ -f3`
        USER=`echo $ENTRY | cut -d/ -f4`
        PPA=`echo $ENTRY | cut -d/ -f5`
        #echo sudo apt-add-repository ppa:$USER/$PPA
        if [ "ppa.launchpad.net" = "$HOST" ]; then
            echo sudo apt-add-repository ppa:$USER/$PPA
            echo sudo apt-add-repository \'${ENTRY}\'

This should do the trick. I needed a question on superuser to figure out the correct regex.

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In your grep -o example, the \` in [a-z0-9\-] is not doing what you expect. It actually matches a literal backslash. You don't need to escape the - when it is at the start or end of the [] list; actually, you can't escape it!.. In this case the \` (probably) won't cause a problem, because you (hopefully) won't encounter a backslash in the deb entry. –  Peter.O Sep 7 '12 at 3:51
Note that PPA names may contain dots, so I think you want to change your regexp to http://ppa.launchpad.net/[a-z0-9-]\+/[a-z0-9.-]\+ –  kynan Jan 7 '13 at 10:28

I use this command to list all configured software sources (repositories), including currently disabled ones:

cat /etc/apt/sources.list; for X in /etc/apt/sources.list.d/*; do echo; echo; echo "** $X:"; echo; cat $X; done

I use this primarily for troubleshooting; this can certainly be incorporated into scripts but you may want to narrow /etc/apt/sources.list.d/* to /etc/apt/sources.list.d/*.list so you only get currently enabled software sources.

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Thx for the feedback. cat lists the files as they are, so I would need to manually edit it to generate a script (as stated in the question). The challenge with repositories: if you just copy the files from /etc/apt you don't get the repository keys. This is why I want a script that fetches them for us –  stwissel Jun 12 '12 at 11:29

To have it add ppa.launchpad.net lines as ppa:$USER/$PPA. Add other repositories with their full line from *.list files. No dupe lines.

# My ~/bin/mk_repositories_restore_script
mkdir -p ~/bin 
echo \#\!/bin/bash > $x
chmod u+x $x
 for APT in $( find /etc/apt/ -name \*.list )
    do sed -n -e '/^deb /{
     /ppa\.launchpad/s/\(.*\/\/[^\/]*.\)\([^ \t]*\)\(.*$\)/sudo apt-add-repository ppa:\2/p;
     /ppa\.launchpad/!s/\(deb[ \t]*\)\(.*$\)/sudo apt-add-repository \2/p;
    }' $APT
) | sort | uniq | tee -a ~/bin/restore_repositories
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