See also

• zUseful Linux HPC commands
• PDF with some commands, from <techtarget.com>.

Case: What is the quota allocation assigned to users within a cluster?

show who has logged in (also shows who is currently logged in)

• last

Shows who is logged in

• w

show quota netid

• where netid is accountID

...

• file (read in vi)
• in kilobytes

Case: Turning off compute nodes

ssh to the compute node, then:

• halt -p now

Note: Check jobs aren't running on a compute node by first going to the head node:

• q or pestat (see below)

iptables

Resource John (Brightworks) recommends (4/24/15), which Oliver found a much more readable version here:

• http://www.aptalaska.net/~jclive/IPTablesFlowChart.pdf

• Local cached copy:
  

  View file
  name IPTablesFlowChart.pdf height 250

• Is an iptables alternative ever going to "take"?
  • Oct 2013's "NFTables To Replace iptables In the Linux Kernel" SlashDot report:
    
    • https://linux.slashdot.org/story/13/10/19/2118247/nftables-to-replace-iptables-in-the-linux-kernel
  • https://en.wikipedia.org/wiki/Nftables
  • http://netfilter.org/projects/nftables/

Basic Linux commands

• exit (exit session)
• top (activity, live)
• q, or qq (list nodes and their status; reverset)
• pestat (node listing of every node with lots of info)
• psbnodes -ln (list of down nodes)
• qstatus -f (status of nodes, with details. Just nodes with queued jobs?)
• ifconfig (show network info)

Version info

• cat /etc/issue
• cat /proc/version