in my termainal i can't mtd
BusyBox v1.24.2 (2020-05-03 11:25:16 UTC) built-in shell (ash)
Enter 'help' for a list of built-in commands.
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Version: 3.4.3.9-099_f36c988
RM2100:/home/root # cd /tmp
RM2100:/tmp # cat /proc/mtd
dev: size erasesize name
mtd0: 00080000 00020000 "Bootloader"
mtd1: 00080000 00020000 "BootEnv"
mtd2: 00500000 00020000 "Factory"
mtd3: 00140000 00020000 "Kernel"
mtd4: 02ec0000 00020000 "RootFS"
mtd5: 00100000 00020000 "Config"
mtd6: 00400000 00020000 "Storage"
mtd7: 04480000 00020000 "RWFS"
mtd8: 03000000 00020000 "Firmware_Stub"
RM2100:/tmp # ls
dnsmasq.leases
hashes/
hosts.static
modem/
openwrt-21.02.0-rc4-ramips-mt7621-xiaomi_redmi-router-ac2100-squashfs-kernel1.bin
openwrt-21.02.0-rc4-ramips-mt7621-xiaomi_redmi-router-ac2100-squashfs-rootfs0.bin
rc_action_incomplete/
rc_notification/
static_ip.inf
static_ip.num
syslog.log
udhcpc_lan.script@
var/
RM2100:/tmp # mtd write openwrt-21.02.0-ramips-mt7621-xiaomi_redmi-router-ac2100-squashfs-kernel1.bin kernel1
-sh: mtd: not found
RM2100:/tmp #