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+====== Find Memory Usage ======
+===== System memory used and free =====
+Total Used and Free Memory in MBytes (in that order)
+<code>
+free -m|grep "buffers/cache"|cut -d":" -f2
+</code>
+===== Memory by Process =====
+Raw
+<code>
+ps -e -orss=,args= | sort -b -k1,1n | pr -TW$COLUMNS
+</code>
+Human readable
+<code>
+ps -e -orss=,args= | sort -b -k1,1n | awk '{ split( "KB MB GB" , v ); s=1; while( $1>1024 ){ $1/=1024; s++ } print int($1) " " v[s] " " $2 }'
+</code>
+===== Memory by Process - Grouped together =====
+Raw
+<code>
+ps -e -orss=,args= | awk '{arr[$2]+=$1} END {for (i in arr) {print arr[i],i}}' | sort -b -k1,1n
+</code>
+Human readable
+<code>
+ps -e -orss=,args= | awk '{arr[$2]+=$1} END {for (i in arr) {print arr[i],i}}' | sort -b -k1,1n | awk '{ split( "KB MB GB" , v ); s=1; while( $1>1024 ){ $1/=1024; s++ } print int($1) " " v[s] " " $2 }'
+</code>
+===== Total RSS Memory =====
+<code>
+ps -e -orss= | awk '{ sum += $1 } END { print sum }'
+</code>
+Human redable
+<code>
+ps -e -orss= | awk '{ sum += $1 } END { print sum }' | awk '{ split( "KB MB GB" , v ); s=1; while( $1>1024 ){ $1/=1024; s++ } print int($1) " " v[s] " " $2 }'
+</code>
+===== Total Memory =====
+<code>
+smem -w -t -k
+</code>
+===== Related =====
+Use ''lshw'' - for listing hardware including physical memory slots