UNIX for Beginners Questions & Answers

hi

i have an android phone which i think is bricked, so wanted to see what the actual issue is, I flashed it with TWRP recovery image and launched terminal i, was able understand that mount is not happening, it says invalid argument and no such file or directory. Below is what i get while mounting

Code:

mount -a 
mount :mounting /dev/block/mmcblk0p21 on /system failed: invalid argument.

tried to do an e2fsck also, it says 

e2fsck  /dev/block/mmcblk0p21 

e2fsck: Bad magic number in super block while trying to open  /dev/block/mmcblk0p21

I tried deleting /system and creating, dint work, tried to mount in a different mount point still dint work, please help

What are you trying to achieve overall?

Have you successfully flashed TWRP? Can you boot into TWRP recovery by holding whatever buttons on the Android as you power up?

What make/model of phone/tablet is it?

If you can boot TWRP recovery it should give you a menu offering all kinds of things like formatting different partitions, possibly resizing partitions, etc.

If you can boot into TWRP then your device is certainly NOT bricked.

Hi
My intention is to flash a rom so that the phone works

I was able to flash twrp via nexus root tool but once it reboots it goes back to te boot loader screen

Phone is lg nexus 4

From fastboot boot and twrp and tried from nexus tool. also, I tried to flash the rom but it says The above error and is not mounting either system, cache or any mount,

so trying to mount manually Using the terminal in twrp

Please help

Are you sure that you successfully flashed your recovery partition with TWRP? Did you unlock your bootloader first?

See this:
How to Boot and Enter Google Nexus 4 Recovery Mode

You should be able to hold buttons (see the link) when you power up and then boot into recovery. If you can do that then you should be able to put your new ROM file onto your memory card (using a PC), insert it into your phone, boot recovery, and then select "flash ROM from SDcard".

Are you actually getting a TWRP menu on the screen?

If you have no SDcard slot then you can use a USB memory stick if you have the right cable.

lg nexus 4 sd card slot - Google Search

Yes I have unlocked the boot loader at the moment if you turn on the phone it default loads the boot loader nothing else works from here

I am getting all options on the twrp but no options work