cat /proc/meminfo |grep MemTotal
$ od -tx1c test.txt 0000000 61 62 63 64 65 82 a0 82 a2 82 a4 82 a6 82 a8 20 a b c d e 202 240 202 242 202 244 202 246 202 250 0000020 0d 0a \r \n 0000022
$ hexdump -C test.txt 00000000 61 62 63 64 65 82 a0 82 a2 82 a4 82 a6 82 a8 20 |abcde.......... | 00000010 0d 0a |..| 00000012
apt-get install net-tools