ない！
$ adb shell No command 'adb' found, did you mean: Command 'cdb' from package 'tinycdb' (main) Command 'gdb' from package 'gdb' (main) Command 'dab' from package 'bsdgames' (universe) Command 'zdb' from package 'zfs-fuse' (universe) Command 'mdb' from package 'mono-debugger' (universe) Command 'tdb' from package 'tads2-dev' (multiverse) Command 'pdb' from package 'python' (main) Command 'jdb' from package 'openjdk-6-jdk' (main) Command 'ab' from package 'apache2-utils' (main) Command 'ad' from package 'netatalk' (universe) adb: command not found
と思ったら移動されているようです。
http://developer.android.com/intl/ja/sdk/tools-notes.html
Upgrading from SDK Tools r7: If you are upgrading to SDK Tools r8 from an earlier version, note that the the default installed location for the adb tool has changed from <SDK>/tools/adb to <SDK>/platform-tools/adb. This means that you should add the new location to your PATH and modify any custom build scripts to reference the new location. Copying the adb executable from the new location to the old is not recommended, since subsequent updates to the SDK Tools will delete the file.
以下のPATHを追加すればよし。
<SDK>/platform-tools
