This post is a cheat to remember which are the main commands to find usage of your consumed resources on a Unix machine.
Try -ef or aux with –sort rss , or –sort -rss
Use -f to match against full command line instead of only process name.
Use -a for display the full command line used + pid.
[lipi@i5-moll ~]$ pgrep -af virtualbox 4584 /usr/lib/virtualbox/VBoxXPCOMIPCD 4589 /usr/lib/virtualbox/VBoxSVC --auto-shutdown 4672 /usr/lib/virtualbox/VirtualBox --comment Windows XP --startvm f82f...
Be careful, -a is not implemented in some pgreps, use -l instead: list the process name as well as the process ID.
With -f it will match the full command line instead of only the process name, just like with pgrep.
lipi@gall:~$ free -m total used free shared buffers cached Mem: 7941 3195 4745 0 157 2076 -/+ buffers/cache: 962 6979 Swap: 1906 0 1906
Here, we see a system with 7941MiB of physical RAM, with 3194 MiB currently in use.
The “shared” column lists the amount of physical memory shared between multiple processes. Here, we see that about 0 MiB of pages are being shared.
The “buffers” column shows the amount of memory being used by the kernel buffer cache. The buffer cache is used for example to speed up disk operations (see slabtop) This memory is reclaimed if it is needed by applications.
The “cached” column indicates how many memory pages the kernel has cached for faster access later.
The memory used for buffers and cache can be reclaimed for use by applications, so the line “-/+ buffers/cache” provides an indication of the memory actually used by applications (“used” column) or available to applications (“free” column). The sum of the memory used by buffers and cache reported in the first line is subtracted from the total used memory and added to the total free memory to give the two figures on the second line.
In the “swap” line, we see the total amount and used swap space. Note that the amount of swap reported by free is somewhat less than the total size of your swap partitions and files. This is because several blocks of each swap area must be used to store a map of how each page in the swap area is being utilized. This overhead should be rather small; only a few kilobytes per swap area.
-a : Show all sockets, both listening and non-listening ones.
-n : Show numbers instead of trying to resolve hostnames
-p : Show program id (PID) of connection owners.
Provides information on the ipc facilities for which the calling process has read access, shared memory, semaphores, queues, etc.
- iftop, iptraf, jnettop: To measure network bandwidth and traffic