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root@raspberrypi-rdk-hybrid:~# fdisk -l
Disk /dev/mmcblk0: 14 GB, 15552479232 bytes, 30375936 sectors
474624 cylinders, 4 heads, 16 sectors/track
Units: sectors of 1 * 512 = 512 bytes

Device       Boot StartCHS    EndCHS        StartLBA     EndLBA    Sectors  Size Id Type
/dev/mmcblk0p1 *  64,0,1      841,0,32          8192     107679      99488 48.5M  c Win95 FAT32 (LBA)
/dev/mmcblk0p2    896,0,1     1023,3,32       114688   10711039   10596352 5174M 83 Linux
root@raspberrypi-rdk-hybrid:~# 


Memory Usage

root@raspberrypi-rdk-hybrid:~# df -h
Filesystem                Size      Used Available Use% Mounted on
/dev/root               865.5M    552.0M    252.0M  69% /
devtmpfs                339.6M         0    339.6M   0% /dev
tmpfs                   468.1M      8.0K    468.1M   0% /dev/shm
tmpfs                   194.3M      8.8M    185.6M   5% /run
tmpfs                   468.1M         0    468.1M   0% /sys/fs/cgroup
tmpfs                   468.1M      6.6M    461.5M   1% /tmp
tmpfs                   468.1M      6.6M    461.5M   1% /etc/snmp/snmpd.conf
tmpfs                   468.1M    236.0K    467.9M   0% /var/volatile
/dev/root               865.5M    552.0M    252.0M  69% /var/lib
/dev/mmcblk0p1           48.5M     27.4M     21.0M  57% /boot
tmpfs                    93.6M         0     93.6M   0% /run/user/0

root@raspberrypi-rdk-hybrid:~#  free -lh
              total        used        free      shared  buff/cache   available
Mem:           936M        571M        217M         26M        147M        311M
Low:           936M        718M        217M
High:            0B          0B          0B
Swap:            0B          0B          0B
root@raspberrypi-rdk-hybrid:~#

Boot memory Information

ComponentSize
Kernel code9216K
RW data737K
RO data2928K
init1024K
BSS853K
vmalloc1097K
cma  total262K
KernelStack2536 kB
Shmem14596 kB
tmpfs95876k
devtmpfs347800k


Changing tmpfs partition size

   Size of tmpfs partition can be changed by using fstab.