Display the total memory (RAM) on the Linux system

#cat /proc/meminfo
MemTotal:      2076452 kB
MemFree:         87404 kB
Buffers:          7844 kB
Cached:        1899844 kB
SwapCached:          0 kB
Active:         102824 kB
Inactive:      1864888 kB
HighTotal:     1179584 kB
HighFree:        36952 kB
LowTotal:       896868 kB
LowFree:         50452 kB
SwapTotal:     5245180 kB
SwapFree:      5245060 kB
Dirty:             224 kB
Writeback:           0 kB
AnonPages:       60024 kB
Mapped:          37012 kB
Slab:            11408 kB
SReclaimable:     7776 kB
SUnreclaim:       3632 kB
PageTables:       1076 kB
NFS_Unstable:        0 kB
Bounce:            132 kB
WritebackTmp:        0 kB
CommitLimit:   6283404 kB
Committed_AS:   148140 kB
VmallocTotal:   114680 kB
VmallocUsed:      5156 kB
VmallocChunk:   109340 kB
HugePages_Total:     0
HugePages_Free:      0
HugePages_Rsvd:      0
HugePages_Surp:      0
Hugepagesize:     4096 kB