Small tip, System Memory information
Follow @ggarronTo check your memory information, just enter this command on the terminal
cat /proc/meminfo
And as its name says, it will display the memory information (mem info).
This is the output of the command in my PC, you do not need to be root to run it.
MemTotal: 2063748 kB MemFree: 1745124 kB Buffers: 19936 kB Cached: 169268 kB SwapCached: 0 kB Active: 118432 kB Inactive: 155208 kB HighTotal: 1169640 kB HighFree: 905780 kB LowTotal: 894108 kB LowFree: 839344 kB SwapTotal: 2650684 kB SwapFree: 2650684 kB Dirty: 3064 kB Writeback: 0 kB AnonPages: 84436 kB Mapped: 34700 kB Slab: 23900 kB SReclaimable: 17164 kB SUnreclaim: 6736 kB PageTables: 560 kB NFS_Unstable: 0 kB Bounce: 0 kB CommitLimit: 3682556 kB Committed_AS: 301852 kB VmallocTotal: 114680 kB VmallocUsed: 48188 kB VmallocChunk: 65644 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 4096 kB
Other applications to check memory are:
Conky, which also shows you other valuable information.