我正在通过 SSH 访问设备。我想更改www目录中的文件，但尝试执行此操作时，系统提示Read-only file system。
mount给了我一些信息，但我看不到任何参考www，为什么www是 RO 或如何www安装：
admin@(none):/# mount
rootfs on / type rootfs (rw)
/dev/root on / type squashfs (ro,relatime)
devtmpfs on /dev type devtmpfs (rw,relatime,size=127752k,nr_inodes=31938,mode=755)
proc on /proc type proc (rw,relatime)
tmpfs on /tmp type tmpfs (rw,relatime)
sysfs on /sys type sysfs (rw,relatime)
devpts on /dev/pts type devpts (rw,relatime,mode=600)
/dev/mtdblock4 on /jffs type jffs2 (rw,noatime)
usbfs on /proc/bus/usb type usbfs (rw,relatime)
这没什么关系，但我有写入文件的权限：
drwxr-xr-x 14 admin root 5999 May 27 05:17 www
我能做什么？
admin@(none):/# ls -l /
drwxr-xr-x 2 admin root 3 May 27 05:17 asus_jffs
drwxr-xr-x 2 admin root 667 May 27 05:12 bin
drwxr-xr-x 2 admin root 3 May 27 05:17 cifs1
drwxr-xr-x 2 admin root 3 May 27 05:17 cifs2
drwxr-xr-x 5 admin root 1580 Nov 8 18:46 dev
lrwxrwxrwx 1 admin root 7 May 27 05:17 etc -> tmp/etc
lrwxrwxrwx 1 admin root 8 May 27 05:17 home -> tmp/home
drwxr-xr-x 5 admin root 0 Nov 8 20:19 jffs
drwxr-xr-x 3 admin root 402 May 27 05:17 lib
lrwxrwxrwx 1 admin root 9 May 27 05:17 media -> tmp/media
drwxr-xr-x 2 admin root 3 May 27 05:17 mmc
lrwxrwxrwx 1 admin root 7 May 27 05:17 mnt -> tmp/mnt
lrwxrwxrwx 1 admin root 7 May 27 05:17 opt -> tmp/opt
dr-xr-xr-x 97 admin root 0 Jan 1 1970 proc
drwxr-xr-x 7 admin root 766 May 27 05:17 rom
lrwxrwxrwx 1 admin root 13 May 27 05:17 root -> tmp/home/root
drwxr-xr-x 2 admin root 2566 May 27 05:17 sbin
drwxr-xr-x 11 admin root 0 Jan 1 1970 sys
drwxr-xr-x 2 admin root 3 May 27 05:17 sysroot
drwxrwxrwx 12 admin root 880 Nov 8 20:19 tmp
drwxr-xr-x 8 admin root 139 May 27 05:17 usr
lrwxrwxrwx 1 admin root 7 May 27 05:17 var -> tmp/var
drwxr-xr-x 14 admin root 5999 May 27 05:17 www