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.
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
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 ismount -o rw,remount -t rfs /dev/stl12 /system
Otherwise... if
getenforce
returns
Enforcing
Then maybe you should call
setenforce 0
mount -o rw,remount /system
setenforce 1
The following may help (study the impacts of disable-verity
first):
adb root
adb disable-verity
adb reboot
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.
从 Google Play 商店获取“adbd insecure”,它有助于提供对自定义 rom 的写访问权限,从而保护我的制造商。
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 <cmd>
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.)
mount -o rw,remount $(mount | grep /dev/root | awk '{print $3}')
这对我有用,应该适用于任何 android 版本。
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