Help on pushing files to device (ADB)

Hello guys, experiencing another problem now :silly:

Have search all around, couldn't find any valid answers so I decided to ask myself.

So I was just making a rom, which I have already installed. It's based on Cataclysm (personal use only - Till I ask for perm).
I have installed the rom, then I decided to theme some system files. And so I did. I theme the "Settings.apk" for now, and decided to push it to my device instead of installing the whole rom over again. Now mind you when I made roms and modified system apps, pushing these files to the device was straight forward. However on this Hammerhead, I've been running into some issues.

When pushing the file to my device like this .
I get an error that says -
So I then decided to try the following -


So then I decided to use some shell commands to set the system as rw, I did the following.


I then restarted cmd with root permission. - it restarted however, this time it stated.
I probably did the wrong thing above, so how exactly can I push files to /system?

SOLVED

Thanks to everyone that answered my question in detail.

gee2012 said:

Why not use usb or AirDroid to transfer files?

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Is it possible to push files to /sustem/priv-app with it?

varuntis1993 said:

The easiest way I know to push files to /system is using a custom recovery . Try with it.

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How would I do so? I've ever only used recovery to flash. And that was it, thanks if you can guide me through it?

Sent from this toast making Nexus 5, you wish your Nexus could make toast don't you? (;

rootSU said:

Boot into recovery and connect the usb cable. Open a cmd prompt.

Code:

adb shell
mount /system
exit
adb push c:\users\krishneelg3\desktopmyfile /system/priv-app

You can also use the "mount system" option in recovery and skip the first 2 commands above.

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Thank you so much! Greatly appreciated.

Sent from this toast making Nexus 5, you wish your Nexus could make toast don't you? (;

rootSU said:

You can still do it through Android, but it's more difficult because adb root doesn't always work (requires kernel) and you have to mount r/w which is just a pain. I always adb push in recovery.

However, here is an example of a successful attempt to adb push on my nexus 5.

Code:

C:\Users\rootsu\Desktop\tools>adb root
adbd is already running as root
C:\Users\rootsu\Desktop\tools>adb shell
root@android:/ # mount -o remount,rw /system
mount -o remount,rw /system
root@android:/ # exit
exit

C:\Users\rootsu\Desktop\tools>adb push [B][COLOR="Red"]test.txt[/COLOR][/B] /system/

C:\Users\rootsu\Desktop\tools>adb shell
root@android:/ # cd system
cd system
root@android:/system # ls
ls
addon.d
app
bin
build.prop
core
etc
fonts
framework
lib
lost+found
media
priv-app
[B][COLOR="red"]test.txt[/COLOR][/B]
tts
usr
vendor
xbin
root@android:/system #

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Thank you I will keep my eye on this and see if the process is similar. Thanks for the info.

Sent from this toast making Nexus 5, you wish your Nexus could make toast don't you? (;