Novell SuSE Linux ES 11 MS Windows Server 2012 Red Hat Ent Linux 6 Red Hat Ent Linux 7 SUSE Linux ES 12 MS Windows Server 2012 R2/SP MS Windows 2008 R2
Binaries are at: http://www.dell.com/support/home/us/en/19/Drivers/DriversDetails?driverId=3XDPP
HTML version of manual: http://www.dell.com/support/Manuals/us/en/19/Topic/poweredge-rc-h730/PERC_CLI_RG_Pub-v1/en-us
PDF of manual: http://topics-cdn.dell.com/pdf/poweredge-rc-h730_Reference%20Guide_en-us.pdf
I'd wanted to use words instead of names if possible (e.g. for "I", I'm used "Ian" because I couldn't find a word that starts with I but has an "e" or other sound.)
I thought about going through the Wiktionary database but that will take a while to program maybe...
Anyway, here's what I have so far:
A - aisle B - bdellium C - czar D - djinn E - euphrates F - effluent (I would prefer a word that starts with "F") G - gnome H - honor I - Ian (can you think of a word not a proper name?) J - jalapeno K - knickers L - elephant (I would prefer a word that starts with "L") M - mnemonic N - Nguyen (resorted to foreign language here :( ) O - ouija board P - pterodactyl (bonus: P sounds like T ) Q - qat R - arse (I would prefer a word that starts with "R") S - schadenfreude (can you think of a non-foreign word that starts "sch" but sounds like "ch"?) T - Tsunami (foreign origin, but has been adopted as English so I don't feel bad about this one) U - urn V - vrow (frau) (optionally "vee") W - wren X - Xian (X is weird anyway, most words sound like "Z" anyway, so I went with an "Sh" sound (Shee-an) instead! but again - it's a foreign name, can't think of a word) Y - yperite Z - Zsa Zsa (proper name :( )
# study.pl ~/Downloads/question_pool.txt enter question # (blank for random question) or Ctrl-C to exit : T6B07 What does the abbreviation "LED" stand for? A. Low Emission Diode B. Light Emitting Diode C. Liquid Emission Detector D. Long Echo Delay answer? A *** WRONG! correct answer is (B) enter question # (blank for random question) or Ctrl-C to exit : T7A07 If figure T5 represents a transceiver in which block 1 is the transmitter portion and block 3 is the receiver portion, what is the function of block 2? A. A balanced modulator B. A transmit-receive switch C. A power amplifier D. A high-pass filter answer? b CORRECT!Download the script
#!/usr/bin/expect
set timeout 120
spawn "./vmware-install.pl"
expect "Press enter to display " { send "\r" }
expect "vSphere Software Development Kit License Agreement" { send "q" }
expect "Do you accept" { send "yes\r" }
expect "Do you want to install precompiled Perl modules for RHEL" { send "\r" }
expect "In which directory do you want to install the executable files" { send "\r" }
# Wait for installation to finish
expect EOF
| ESXi host | Tunnel Source | Tunnel Destination |
| host1 | 127.0.0.2:443 | esxhost1:443 |
| host1 | 127.0.0.2:902 | esxhost1:902 |
| host1 | 127.0.0.2:903 | esxhost1:903 |
| host2 | 127.0.0.3:443 | esxhost2:443 |
| host2 | 127.0.0.3:902 | esxhost2:902 |
| host2 | 127.0.0.3:903 | esxhost2:903 |
Long story short -- I had to make my own Celestia ".ssc" files to describe the spacecraft. Using the JPL HORIZONS web interfaceyou can get recent orbital elements, but you have to convert these to something Celestia will understand (an "EllipticalOrbit" stanza in the ".ssc" file).
The perl script below does the conversion; just run it and paste in a single block of Ephemeris data like this:
2456621.500000000 = A.D. 2013-Nov-25 00:00:00.0000 (CT) EC= 4.143129880700237E-02 QR= 9.996672652291025E-01 IN= 2.936558964716465E-01 OM= 3.363978705358475E+02 W = 1.469845587993808E+02 Tp= 2456458.185749091208 N = 9.254559117051611E-01 MA= 1.511401389693867E+02 TA= 1.533315740323342E+02 A = 1.042874927988944E+00 AD= 1.086082590748784E+00 PR= 3.889974610856358E+02And you'll get output line this:
EllipticalOrbit
{
Epoch 2456621.500000000
Period 1.06499689086802
SemiMajorAxis 1.04287492798894
Eccentricity 0.041431298807
Inclination 0.293655896472
AscendingNode 336.397870535848
ArgOfPericenter 146.984558799381
MeanAnomaly 151.140138969387
}
The perl script is below, or you can download it here.
#!/usr/bin/perl -w
# input an ephem set like this:
#2456621.500000000 = A.D. 2013-Nov-25 00:00:00.0000 (CT)
# EC= 4.143129880700237E-02 QR= 9.996672652291025E-01 IN= 2.936558964716465E-01
# OM= 3.363978705358475E+02 W = 1.469845587993808E+02 Tp= 2456458.185749091208
# N = 9.254559117051611E-01 MA= 1.511401389693867E+02 TA= 1.533315740323342E+02
# A = 1.042874927988944E+00 AD= 1.086082590748784E+00 PR= 3.889974610856358E+02
# output like this:
# EllipticalOrbit
# {
# Epoch 2456621.500000000 # = A.D. 2013-Nov-25 00:00:00.0000 (CT)
# # reference http://www.lepp.cornell.edu/~seb/celestia/transforming_ephemeris.html
# Period 1.06499689086801936 # P = (q/(1-e))^1.5 for a closed, elliptical orbit (q = QR, e = ER)
# SemiMajorAxis 1.04287492798894325 # a = (q+Q)/2, where Q is Apoapsis distance (AD in horizons ELEMENTS)
# Eccentricity 0.04143129880700237 # (EC)
# Inclination 0.2936558964716465 # (IN)
# AscendingNode 336.3978705358475 # (OM)
# ArgOfPericenter 146.9845587993808 # (W)
# MeanAnomaly 151.1401389693867 # (MA)
# }
my ($Epoch, $EC, $QR, $IN, $OM, $W, $Tp, $N, $MA, $TA, $A, $AD, $PR);
my ($Period, $SemiMajorAxis);
print "Input a single block of ephem data\n";
while () {
if ( /^((\w|\.)+)/ ) {
$Epoch = $1;
}
if ( /EC=/ ) {
($EC, $QR, $IN) = (split())[1,3,5];
}
if ( /OM= / ) {
#$_ = readline; chomp;
($OM, $W, $Tp) = (split())[1,4,6];
}
if ( /N = / ) {
#$_ = readline; chomp;
($N, $MA, $TA) = (split())[2,4,6];
}
if ( /AD= / ) {
#$_ = readline; chomp;
($A, $AD, $PR) = (split())[2,4,6];
last;
}
}
$Period = ( $QR / (1 - $EC) )**1.5 ;
$SemiMajorAxis = ( $QR + $AD ) / 2 ;
print "EllipticalOrbit\n";
print "{\n";
print "\tEpoch $Epoch\n";
print "\tPeriod $Period\n";
print "\tSemiMajorAxis $SemiMajorAxis\n";
print "\tEccentricity " . sprintf("%12.12f\n",$EC);
print "\tInclination " . sprintf("%12.12f\n",$IN);
print "\tAscendingNode " . sprintf("%12.12f\n",$OM);
print "\tArgOfPericenter " . sprintf("%12.12f\n",$W);
print "\tMeanAnomaly " . sprintf("%12.12f\n",$MA);
print "}\n";
Soon my users were experiencing some issues on logging in via SSH. The symptom was one of the following would occur:
I did a lot of different things to try to find the problem. I found that rebooting the system resolved the issue temporarily. Exacerbating the issue was that only a couple systems were experiencing the problem -- not all of them. So at first I discounted it being an issue with the configuration of the system. I chased the red herring of a certain application we were running on *only* those systems.
Another symptom of the issue was that "su" would also pause for ~20 seconds before presenting the password prompt, so I knew it wasn't limited to sshd.
Eventually I found the problem by doing the following:
# strace su -
[...]
### The output would pause here:
connect(3, {sa_family=AF_FILE, path="/dev/log"}, 110) = 0
sendto(3, "<86>Jul 19 16:36:59 su: pam_unix"..., 96, MSG_NOSIGNAL, NULL, 0) =
/dev/log is a UNIX domain socket, used by the syslog (and rsyslog) daemons. The system was trying to write to the socket, and it was taking a long time.
When I looked at the config file (/etc/rsyslog.conf), I found that it had been setup to log to a remote server on our production network. Of course, the lab did not have access to the production network! So rsyslog was trying to log to a non-existent system.
The fix was simply to remove the non-existent remote syslog server from rsyslog.conf and restart syslog.
Why didn't *all* the lab systems have the same problem? I believe this is because the "problem" systems had much more syslog messages than the other systems -- due to the application we were running on those systems. So it was only indirectly related to the application!