[Galaxy Tab 2 Q&A, Help & Troubleshooting] Godfather_way:
FILES AND THINGS NEEDED

DRIVE LINK WITH THE NECESSARY FILES TO ROOT YOUR GALAXY TAB 2 10.1 (NOT INCLUDING GAPPS AND LINEAGE OS)

LINEAGE OS

GAPPS

SUPPLIED USB CABLE AND A MICRO SD CARD 8GB IS GOOD ENOUGH

INSTRUCTIONS:

STEP 1 Upgrading to 4.12 if you are not in 4.12

Make sure to check your tablet software is running android 4.12 the last official support for the tablet if you are somehow running 4.0 or any other software other than 4.12 flash the 4.12 firmware provided in the link above "I497UCBMF2_I497ATTBMF2_I497UCBMF2_HOME.tar" via ODIN which is included with CF AUTO ROOT provided in the link above. make sure that you are in download mode by first powering off your tablet and pressing both power button and volume down button at the same time up until you see the caution screen just press the volume up button and then connect your tablet to your pc making sure ODIN is up and running the files have their own respected places in ODIN and just hit start and it will do its magic.

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STEP 2 Flashing CF AUTO ROOT

Make sure that you have flashed the 4.12 firmware successfully by going into settings and about device after that power off your device and go back to download mode by again pressing both power button and volume down button at the same time and pressing volume up again and this time flashing "CF-Auto-Root-espresso10att-espresso10uc-samsungsghi497.tar.md5" via ODIN repeat the same steps as the ones you did for the firmware and once its good restart your tablet and check with ROOT CHECKER to see if you have successfully rooted your tablet.

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STEP 3 Flashing TWRP

Now after confirming that your tablet is rooted now flash TWRP by repeating the steps of powering off your tablet and then pressing power button and volume down button and then pressing the volume up button when the caution screen appears and the connect your tablet and then flash the TWRP via ODIN and once that is done you will now start flashing the custom roms provided.

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STEP 4 last step flashing LINEAGE OS and GAPPS

download both LINEAGE OS and GAPPS and place them into your micro SD card of choice and then make sure that you do not unzip the zip files as TWRP will take care of that for you.

After confirming that you have the files in the SD card boot into TWRP by making sure that your tablet is OFF and pressing both power button and volume up button at the same time up until this screen shows up.

(IMAGE FOR EXAMPLE ONLY)

Just incase click backup and backup everything into the SD card incase something goes wrong by pressing the backup button and checking all of the necessary system files.

Now that you have back up your system incase something goes wrong go back to the main screen and click wipe and swipe on "Swipe to Factory Reset" and after that finishes click on the back button. now click on the install button and then locate where you stored your files and click your LINEAGE OS ZIP and swipe on "Swipe To Confirm Flash" and wait for it to finish. Once it's done click on "WIPE CACHE/DALVIK button and then swipe to wipe the cache and then click on back and then click on back. Now you should be where your files are and now you can click on your GAPPS ZIP and swipe on "Swipe To Confirm Flash" again and the wipe the cache again by repeating the steps above. Now for the good part click on reboot system and wait for your tablet to reboot and you should be able to see the LINEAGE OS logo instead of the samsung logo if you did it right you may see a black screen after reboot don't panic just wait until you see the LINEAGE OS logo appear once you see the logo just wait for it to load in and then setup your tablet and you are done