How can I remount my Android system as read-write in a bash script using adb

Question

For info   adb remount    returns  remount failed  Operation not permitted   adb shell  su -c  mount -o rw remount  system    returns unknown option -- o  My device is rooted

User · Answer

mount -o rw remount   mount   grep  dev root   awk   print  3      this does the job for me  and should work for any android version

User · Answer

Probable cause that remount fails is you are not running adb as root   Shell Script should be as follow     Script to mount Android Device as read write    List the Devices  adb devices     Run adb as root  Needs root access   adb root     Since you re running as root su is not required adb shell mount -o rw remount      If this fails  you could try the below     List the Devices  adb devices     Run adb as root adb root   adb remount  adb shell su -c  mount -o rw remount       To find which user you are       adb shell whoami

User · Answer

Otherwise     if  getenforce   returns  Enforcing   Then maybe you should call  setenforce 0  mount -o rw remount  system  setenforce 1

User · Answer

In addition to all the other answers you received  I want to explain the unknown option -- o error  Your command was    adb shell  su -c  mount -o rw remount  system    which calls su through adb   You properly quoted the whole su command in order to pass it as one argument to adb shell   However  su -c  lt cmd gt  also needs you to quote the command with arguments it shall pass to the shell s -c option    YMMV depending on su variants    Therefore  you might want to try    adb shell  su -c  mount -o rw remount  system      and potentially add the actual device listed in the output of mount   grep system before the  system arg     see the other answers

User · Answer

I could not get the mount command to work without specifying the dev block to mount as  system     cat  proc mounts returns   only the system line here    dev stl12  system rfs ro relatime vfat log off check no gid uid rwx iocharset utf8 0 0    so my working command is mount -o rw remount -t rfs  dev stl12  system

User · Answer

I had the same problem and could not mount system as read write  It would return      Usage  mount  -r   -w   -o options   -t type    device directory   Or      operation not permitted  Access denied   Now this works on all rooted devices   DO THE FOLLOWING IN TERMINAL EMULATOR OR  IN ADB SHELL    su  mount - o rw remount -t yaffs2  system   Yaffs2 is the type of system partition  Replace it by the type of your system partition as obtained from executing the following    cat  proc mounts   Then check where  system is appearing from the lengthy result   Extract of mine was like  mode 755 gid 1000 0 0 tmpfs  mnt obb tmpfs rw relatime mode 755 gid 1000 0 0 none  dev cpuctl cgroup rw relatime cpu 0 0 dev block platform msm sdcc 3 by-num p10  system ext4 ro relatime data ordered 0 0  dev block platform msm sdcc 3 by-num p11  cache ext4 rw nosuid nodev relatime data ordered 0 0   So my system is ext4  And my command was    su  mount  -o  rw remount  -t  ext4   system    Done

User · Answer

Get  adbd insecure  from google play store  it helps give write access to custom roms that have it secured my the manufacturers

User · Answer

The following may help  study the impacts of disable-verity first     adb root adb disable-verity adb reboot

[android] How can I remount my Android/system as read-write in a bash script using adb?

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