Roundtable February 2019

roundtable@muug.ca

11 participants
8 discussions

Next AWS user group meetup
by Mark Campbell 20 Feb '19

20 Feb '19

Hey all, the next AWS user group meetup is scheduled for March 7th at the St. B library. The talks will be on EC2 and VPC networking (with Wyatt!). Free pizza and free aws knowledge, what could be better? Le Garage afterwards was pretty decent too! RSVP here: https://www.eventbrite.ca/e/winnipeg-aws-user-group-march-meetup-tickets-57…

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Co-location costs
by Daulton 17 Feb '19

17 Feb '19

Hi guys, Does anyone have any estimates they could give me for the prices for 1U or 2U colocation at any of the cities providers? Whether it be MTS, Les.net, Fiber Fortress, etc. I know I can contact them each for quotes but I am first wondering about your guys experience. To give an example of power usage it would be something such as a Dell R710. Thanks, Daulton

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Re: [RndTbl] Weird code showing up in bash history
by Dean, Marisa (IT.PFMS) 15 Feb '19

15 Feb '19

Hi Sorry for a random email many years later, I am hoping you take the time to reply. I came across your post of BMC ADDM spamming bash history and wondered did you ever find a way to stop it doing this and discover in a neater method? Kind Regards, Marisa Dean | Infrastructure Operations Specialist - Linux | Provident Financial<http://www.providentfinancial.com/> 1 Godwin Street | Bradford | West Yorkshire | BD1 2SU marisa.dean(a)provident.co.uk<mailto:marisa.dean@provident.co.uk> [Facebook]<http://www.facebook.com/#!/providentfinancial>[LinkedIn]<http://www.linkedin.com/company/provident-financial-group-uk-&-roi> United Kingdom only: Provident is a trading name of Provident Personal Credit Limited. Registered Office: No.1 Godwin Street, Bradford, West Yorkshire, BD1 2SU. Registered number 146091 England. Provident Personal Credit Limited is Authorised and regulated by the Financial Conduct Authority. Financial Services Register Number: 700144. United Kingdom only: Provident Financial Management Services Limited, Registered in England Company Number 328933. Registered Office: No.1 Godwin Street, Bradford, West Yorkshire BD1 2SU, United Kingdom. Provident Financial Management Services Limited is Authorised and Regulated by the Financial Conduct Authority. Financial Services Register Number: 700139. Republic of Ireland only: Provident Personal Credit Limited (trading as "Provident") is regulated by the Central Bank of Ireland,. Provident Personal Credit Limited, a private limited company, Rosslare Road, Rochestown, Drinagh, Wexford, Co. Wexford. Branch Number 904339. Provident Personal Credit Limited Registered Office: No. 1 Godwin Street, Bradford, West Yorkshire, BD1 2SU, United Kingdom. Registered Number 146091 England. A list of names and personal details of every director of the company is available for inspection to the public at the company's registered office for a nominal fee. DISCLAIMER. The contents of this email and its attachments are intended solely for the original recipients and express the views of the authors and not necessarily the Company. If you are not the intended recipient please delete without copying or forwarding and inform the sender that you received it in error. Please save paper - don't print this email unless necessary.

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"sc" - helper script for systemctl
by Brian Lowe 13 Feb '19

13 Feb '19

Here's a helper script I wrote for systemctl to reduce the amount of typing you need to do to invoke common systemctl function. Put this script into /usr/bin or /usr/local/bin (in which case, you may need to add /usr/local/bin to root's PATH), then run 'sc --setup' to make the needed symlinks. #!/bin/bash ##--------------------------------------------------------------------------- ## # # Script: 'sc' - systemctl shortener # Author: Brian Lowe # Date: December 2015 # # 'sc' implements a series of shortcuts for the 'systemctl' command (and # one for 'journalctl') via a series of symlinks in /usr/local/bin: # # Symlink Runs # sc systemctl # scs systemclt start # scr systemclt restart # sck systemctl stop ('k' = 'kill') # scl systemctl reload ('l' = reLoad) # scq systemctl status ('q' = 'query') # sct systemctl status ('t' = 'sTaTus') # scj journalctl ('scj NAME' runs 'journalctl --catalog --unit=NAME') # sch (provides help for the 'sc' command) # ##--------------------------------------------------------------------------- ## # # Setup: # 1. Put this script into /usr/local/bin # 2. Run the 'sc --setup' to set up the symlinks # ##--------------------------------------------------------------------------- ## # BUUS: This script is part of Brian's Useful Utilities Set ##--------------------------------------------------------------------------- ## PROGRAM_TO_RUN='systemctl' COMMAND='' BASENAME="$(basename $0)" if [ $BASENAME = 'sc' -a "$1" = '--setup' ] then DIRNAME=$(dirname $0) [ "$DIRNAME" ] && cd $DIRNAME echo -n "Setting up:" awk '/^#[[:space:]]*sc[a-z][[:space:]]/{print $2}' sc | while read X do [ -L $X ] || (echo -n " $X,"; ln -s sc $X) done echo " done" exit fi case $BASENAME in scs) COMMAND='start';; sck) COMMAND='stop';; scr) COMMAND='restart';; scl) COMMAND='reload';; scq) COMMAND='status';; sct) COMMAND='status';; scj) PROGRAM_TO_RUN='journalctl';; sch) COMMAND='sc-show-help';; esac #--- Handle a 'help' command (-h, --help) if [ "$1" = '-h' -o "$1" = "--help" ] then if [ ! "$COMMAND" ] then echo "Running 'systemctl --help' -- run 'sch' for help on 'sc' itself" sleep 1 fi fi #--- Handle 'scj UNIT-NAME', where the user wants the journal for a given unit if [ "$PROGRAM_TO_RUN" = 'journalctl' -a "$1" -a "${1:0:1}" != '-' ] then COMMAND="--catalog --unit=$1" shift fi #--- Handle 'sc-show-help' (help for the 'sc command' if [ "$COMMAND" = 'sc-show-help' ] then awk ' /#[[:space:]]*sch/ { exit } /#[[:space:]]*[[:alnum:]]+:/ { sw = 1 } sw == 1 && /^#[[:space:]]*$/ { sw = 2 } sw == 2 { match($0, /^#\t(.*)/, a); print a[1] } ' $0 echo exit fi echo -n " >> $PROGRAM_TO_RUN $COMMAND"; [ "$1" ] && echo -n " $@"; echo exec $PROGRAM_TO_RUN $COMMAND "$@"

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a different systemd argument
by Adam Thompson 13 Feb '19

13 Feb '19

From one of the FreeBSD developers: https://www.youtube.com/watch?v=o_AIw9bGogo This is the updated version of his talk, and is more cogent and helpful than the first version, so just watch this one :-). -Adam P.S. I still don't agree with some of his fundamental assumptions, nor some of his conclusions, but some of what he says makes sense.

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d-port daisychains and ryzen ecc
by Trevor Cordes 13 Feb '19

13 Feb '19

For those not at the meeting tonight, I just wanted to give a quick report on some new-ish first-hand tech experience vis a vis Linux support. - Display-port daisychaining works with Linux (kernel must be fairly new), and at least the nvidia binary driver (not sure about nouveau, though the Intel onboard GPU FLOSS drivers are said to support it for sure). You'd also need a vidcard that is new-ish with a new enough dport spec. Probably any decent mid-range card in the last 3 years will do. - Final monitor in the chain doesn't need a pass-thru port and can be an older dport spec (probably 1.1+) - Works great with 2 x 2560x1440 LCDs, but 2 x 4k is probably beyond the bandwidth of current widely-available dport spec - Ryzen (1st and 2nd gen) supports ECC on (certain) normal desktop boards, like most Asrock ones. We used Asrock AB350-PRO4. edac-utils says it works. dmidecode hints it works, though with some weird output. memtest86 (latest version) says it works. rasdaemon says it works. It's rasdaemon that is the replacement for abandon-ware edac-utils. So there you have it, an option to get a "workstation" with ECC and at least 1 PCIe x16 (full lanes) slot. At about half the price of a Xeon setup, which is the only way to get ECC + x16 slot in Intel land with a real CPU. There are some Ryzen teething issues and bios+linux workarounds you have to do though, so it's not as painless as a Xeon would be. If anyone knows why dmidecode says this for ram widths, let me know: Error Correction Type: Multi-bit ECC Data Width: 64 bits Total Width: 128 bits (128 bits!!!!? should be 72)

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Helper BASH script for systemctl
by Brian Lowe 13 Feb '19

13 Feb '19

As I mentioned at tonight's meeting, I've written a helper BASH script for systemctl. Source is attached. Put it into /user/bin or /usr/local/bin (in which case you may need to add /usr/local/bin to root's PATH), and run 'sc --setup' to have it set up the symlinks. Brian

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MUUG Meeting, Feb 12, 7:30pm -- Cacti, RTFM: systemctl
by Gilbert E. Detillieux 05 Feb '19

05 Feb '19

The Manitoba UNIX User Group (MUUG) will be holding its next monthly meeting on Tuesday, February 12. The meeting topic for this month is as follows: Cacti Cacti is an open-source, web-based network monitoring and graphing tool designed as a front-end application for the data logging tool RRDtool. Cacti allows a user to poll services at predetermined intervals and graph the resulting data. Wyatt Zacharias will be giving us a new look at this software. RTFM: systemctl(1) Most Linux distros have now adopted systemd as the new init process. Gilbert Detillieux will introduce the very basics of using systemctl(1) to control services in a systemd-based environment. The group holds its meetings at 7:30pm on the second Tuesday of every month from September to June. (There are no meetings in July and August.) Meetings are open to the general public; you don't have to be a MUUG member to attend. ******************************************************************* Please note our meeting location for this month: *Room 1M28* Manitoba Hall, University of Winnipeg, entrance on Ellice Ave. between Spence and Balmoral St. Parking is available on the surrounding streets and in the lots on nearby streets. Look for signage once you're at the building, or ask a security guard. ******************************************************************* For more information about MUUG, and its monthly meetings, check out their web server: https://muug.ca/ Help us promote this month's meeting, by putting this poster up on your workplace bulletin board or other suitable public message board: https://muug.ca/meetings/MUUGmeeting.pdf -- Manitoba UNIX User Group E-mail: <gedetil(a)muug.ca> c/o Gilbert E. Detillieux Web: http://muug.ca/ University of Manitoba Phone: (204)474-8161 Winnipeg MB CANADA R3T 2N2 Fax: (204)474-7609

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Roundtable February 2019