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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘*nix’ Category

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Need help with OpenSuSE Tumbleweed `cd:/content: Invalid signature. Installation aborted.`

Posted by jpluimers on 2016/09/07

This succeeded: https://openqa.opensuse.org/tests/overview?distri=opensuse&version=Tumbleweed&build=20160901&groupid=1 installing the image from http://download.opensuse.org/tumbleweed/iso/openSUSE-Tumbleweed-DVD-x86_64-Current.iso.mirrorlist (for which the md5 and sha signatures match).

But I got this cd:/content: Invalid signature. Installation aborted. message:

After a few statements [WayBack] in the install shell:

mkdir /mnt/cd
mount /dev/cdrom /mnt/cd
cd /mnt/cd
gpg --import content.key
gpt --verify content.asc

Indeed the cd:/content didn’t verify as content.key wasn’t a trusted signature:

How to proceed?

–jeroen

Posted in *nix, Linux, openSuSE, Power User, SuSE Linux, Tumbleweed | Leave a Comment »

Oddest OpenSuSE Tumbleweed installation screen colours ever…

Posted by jpluimers on 2016/09/07

Oddest OpenSuSE Tumbleweed installation screen colours ever…

Source: Screenshot 2016-09-07 15.51.08.png

Posted in Linux, openSuSE, Power User, SuSE Linux, Tumbleweed | Leave a Comment »

A bash script to btrfs snapshot details like disk sizes (requires btrfs quota to be enabled)

Posted by jpluimers on 2016/09/06

One thing I’ve not figured out yet is this: How does enabling btrfs quotas impact the system? – Unix & Linux Stack Exchange

My gut feeling says it’s not much. But if someone knows: please chime in.

Anyway: btrfs quota support helps you to see how big snapshots (and other subvolumes) are.

Enabling and disabling is easy (the slash is the path from where to enable quota):

btrfs quota enable /

btrfs quota disable /

The bad thing is that there is no command that gives just the quota status. You have to revert to btrfs qgroup show /

This will show you quota groups when quota are enabled:

qgroupid         rfer         excl 
--------         ----         ---- 
0/5          16.00KiB     16.00KiB

or errors when quota are disabled either of these two errors:

# btrfs qgroup show /
ERROR: can't perform the search - No such file or directory
ERROR: can't list qgroups: No such file or directory

# btrfs qgroup show /
ERROR: can't list qgroups: quotas not enabled

You might also want to check the syslogs as there was a [PATCH 1/2] btrfs: syslog when quota is enabled.

The btrfs qgroup output is the base for agronick/btrfs-size: A script that will print out a list of BTRFS subvolumes along with their size in megabytes and their name.

It actually shows it in human readable form (kilo/mega/giga/… bytes) and is documented at Get the size of your BTRFS Snapshots | PoisonPacket. It gives me a nice overview that corresponds to the snapper list output (see below).

The script has two drawbacks:

./btrfs-size/btrfs-size.sh: line 55: can't + 0: syntax error: invalid arithmetic operator (error token is "'t + 0")

  • it can take a while for btrfs quota enable / to actually deliver the quota for all the qgroupid values snapper uses. Until that time, the columns ID/Total/Exclusive Data are empty.
  • it won’t warn you if the quota data is out of data; to check that, run the below script

# btrfs qgroup show / > /dev/null
WARNING: Qgroup data inconsistent, rescan recommended

In that case, run btrfs quota rescan / and wait for it to complete by running this command until the warning is gone:

# btrfs qgroup show / > /dev/null
WARNING: Rescan is running, qgroup data may be incorrect

If the warning reverts to WARNING: Qgroup data inconsistent, rescan recommended then you might see the effects from this bug and should not worry about it: Bug 933428 – btrfs qgroup – allways shows WARNING: Qgroup data inconsistent.

For more btrfs quota background information, see: UseCases – btrfs Wiki.

–jeroen

Read the rest of this entry »

Posted in *nix, *nix-tools, bash, Development, Linux, openSuSE, Power User, Scripting, Software Development, SuSE Linux, Tumbleweed | 1 Comment »

Webserver cipher hardening links

Posted by jpluimers on 2016/08/26

There are quite a few pages on Webserver Cypher Hardening. This is yet another one born because I didn’t know how to compare these lists and why they were so different.

Apparently, OpenSSL has various ways of naming (groups of) cyphers. OpenSSL also disregards any cyphers it doesn’t have.

Basically there are two far ends for cypher lists:

  1. Fully name all cyphers and their order: long list fine grained control
  2. Name groups including group order and let OpenSSL expand the groups: short list but coarse grained control.

A way to compere them using openssl ciphers -V is answered at ssl – Hardening web server cyphers: which cypher list to choose, or how to map between Mozilla and Hynek – Server Fault.

Some of the cypher lists I found:

There are two great SSL tests I found out. The first one is online, the second one from the shell.

  1. SSL Labs:
  2. shell based SSL/TLS tester: testssl.sh.

–jeroen

Posted in *nix, OpenSSL, Power User, Security | Leave a Comment »

APC: getting ftp://ftp.apc.com/apc/public/software/pnetmib/mib/417/powernet417.mib turned out to be tricky

Posted by jpluimers on 2016/08/24

I tried updating my downloads for my APC7920 and APC7921 PDUs.

I knew the APC download site http://www.apc.com/nl/en/tools/download/index.cfm was slow and navigation unfriendly (lots of ERR_CACHE_MISS as you cannot ctrl-click on downloads), but it’s also buggy: Some of the ftp download URLs do not contain the authentication and one file would not download at all.

The solution for that is to prepend the credentials as username:password@ like these URLs where each first one is generated by the download site and each second one works:

  • ftp://ftp.apcc.com/restricted/hardware/nmcard/firmware/devipcfg_wiz/502/Device%20IP%20Configuration%20Wizard.exe
  • ftp://restrict:Kop$74!@ftp.apcc.com/restricted/hardware/nmcard/firmware/devipcfg_wiz/502/Device%20IP%20Configuration%20Wizard.exe
  • ftp://ftp.apc.com/restricted/hardware/nmcard/firmware/sec_wiz/104/SecWiz%201.04%20Install.exe
  • ftp://restrict:Kop$74!@ftp.apc.com/restricted/hardware/nmcard/firmware/sec_wiz/104/SecWiz%201.04%20Install.exe

The username is restrict and the password Kop$74! which requires single quotes on the command-line to prevent parameter and event expansion.

Otherwise you will get bash errors like these: event not found for the part starting with an exclamation mark and Login incorrect. for the parts having a dollar.

One file would not download at all: ftp://ftp.apc.com/apc/public/software/pnetmib/mib/417/powernet417 as all download attempts would time out:

  • Chrome with and without username:password@ (you will get a ERR_FTP_FAILED)
  • wget with and without username:password@ (it will result in a )
  • plain curl with and without username:password@ (it will result in a curl: (28) Timeout was reached)

The only command that would work was this:

curl -G ftp://ftp.apc.com/apc/public/software/pnetmib/mib/417/powernet417.mib > powernet417.mib

via: SimplicityGuy/pynoc – Travis CI

The trick is to:

  1. leave username and password away
  2. specify the -G (or –get) parameter forcing GET behaviour (which should be the default).

I’m not sure why it works, but it does.

–jeroen

Posted in *nix, APC Smart-UPS, cURL, Power User, UPS | Leave a Comment »

tombh/texttop: A fully interactive X Linux desktop rendered in TTY and streamable over SSH

Posted by jpluimers on 2016/08/09

Wonder if I can get this to work from macOS / OS X as a client:

texttop – A fully interactive X Linux desktop rendered in TTY and streamable over SSH

Source: tombh/texttop: A fully interactive X Linux desktop rendered in TTY and streamable over SSH

via: Kristian Köhntopp – Google+

Read the rest of this entry »

Posted in *nix, *nix-tools, Communications Development, Development, Internet protocol suite, Linux, Power User, Software Development, SSH, TCP | Leave a Comment »

OpenSuSE Tumbleweed `zypper dist-upgrade`: `mt-st` versus `mt_st`

Posted by jpluimers on 2016/08/08

TL;DR: I’m not the only one being partially word-blind.

I had the below while performing a zypper distribution upgrade on "openSUSE Tumbleweed (20160726) (x86_64)".

revue:/etc # zypper dist-upgrade
...
Detected 2 file conflicts:

File /usr/bin/mt
  from install of
     mt-st-1.3-1.1.x86_64 (Main Repository (OSS))
  conflicts with file from package
     mt_st-1.3-1.2.x86_64 (@System)

File /usr/sbin/stinit
  from install of
     mt-st-1.3-1.1.x86_64 (Main Repository (OSS))
  conflicts with file from package
     mt_st-1.3-1.2.x86_64 (@System)

File conflicts happen when two packages attempt to install files with the same name but different contents. If you continue, conflicting files will be replaced losing the previous content.
Continue? [yes/no] (no): no

Problem occured during or after installation or removal of packages:
Installation aborted by user

Please see the above error message for a hint.

Did you see the cause of the error in the above message?

Neither did I.

So I went to the #opensuse-factory IRC channel on freenode with this information:

revue:/etc # zypper repos --details 
# | Alias                               | Name                       | Enabled | GPG Check | Refresh | Priority | Type   | URI                                                                                    | Service
--+-------------------------------------+----------------------------+---------+-----------+---------+----------+--------+----------------------------------------------------------------------------------------+--------
1 | download.opensuse.org-non-oss       | Main Repository (NON-OSS)  | Yes     | (r ) Yes  | Yes     |   99     | yast2  | http://download.opensuse.org/tumbleweed/repo/non-oss/                                  |        
2 | download.opensuse.org-oss           | Main Repository (OSS)      | Yes     | (r ) Yes  | Yes     |   99     | yast2  | http://download.opensuse.org/tumbleweed/repo/oss/                                      |        
3 | download.opensuse.org-tumbleweed    | Main Update Repository     | Yes     | (r ) Yes  | Yes     |   99     | rpm-md | http://download.opensuse.org/update/tumbleweed/                                        |        
4 | http-download.opensuse.org-f3ba78e8 | server:monitoring          | Yes     | (r ) Yes  | Yes     |   99     | rpm-md | http://download.opensuse.org/repositories/server:/monitoring/openSUSE_Tumbleweed/      |        
5 | openSUSE-20150508-0                 | openSUSE-20150508-0        | No      | ----      | No      |   99     | yast2  | cd:///?devices=/dev/disk/by-id/ata-VMware_Virtual_IDE_CDROM_Drive_10000000000000000001 |        
6 | repo-debug                          | openSUSE-Tumbleweed-Debug  | No      | ----      | Yes     |   99     | NONE   | http://download.opensuse.org/debug/tumbleweed/repo/oss/                                |        
7 | repo-source                         | openSUSE-Tumbleweed-Source | No      | ----      | Yes     |   99     | NONE   | http://download.opensuse.org/source/tumbleweed/repo/oss/                               |        
revue:/etc # cat /etc/os-release 
NAME=openSUSE
VERSION="Tumbleweed"
VERSION_ID="20160726"
PRETTY_NAME="openSUSE Tumbleweed (20160726) (x86_64)"
ID=opensuse
ANSI_COLOR="0;32"
CPE_NAME="cpe:/o:opensuse:opensuse:20160726"
BUG_REPORT_URL="https://bugs.opensuse.org"
HOME_URL="https://www.opensuse.org/"
ID_LIKE="suse"

There cooloo pointed out both the cause and solution were deceptively simple:

coolo: wiert: zypper remove mt_st ; zypper dup; zypper in mt-st
coolo: the package was incorrectly renamed

My partial word-blindness didn’t spot the difference between mt_st and mt-st, but it was indeed renamed.

So here I went:

zypper remove mt_st ; zypper dist-upgrade; zypper install mt-st

Note that strictly zypper install mt-st isn’t needed on my system as it is part of  Base:System. which means that zypper dist-upgrade automatically re-installed it.

–jeroen

Posted in *nix, Linux, openSuSE, Power User, SuSE Linux, Tumbleweed | Leave a Comment »

bash – How can I convert tabs to spaces in every file of a directory? – Stack Overflow

Posted by jpluimers on 2016/08/05

Kev:

Try the command line tool expand.

expand -t 4 input >output

Chrono Kitsune:

And for those systems that don’t use the GNU Core Utilities, you have a decent chance of expand being installed since it is standardized by The Open Group’s Single Unix Specification. See Issue 6, which is from 2001, though some updates were applied, hence the year of publication being 2004: expand

–jeroen

via bash – How can I convert tabs to spaces in every file of a directory? – Stack Overflow.

Posted in *nix, *nix-tools, bash, bash, Development, Linux, openSuSE, Power User, Scripting, Software Development, SuSE Linux | Leave a Comment »

Make A Bootable Windows 10 USB Install Stick On Linux With WinUSB Fork ~ Web Upd8: Ubuntu / Linux blog

Posted by jpluimers on 2016/07/29

One day I’m going to need this: Make A Bootable Windows 10 USB Install Stick On Linux With WinUSB Fork ~ Web Upd8: Ubuntu / Linux blog

So I’m glad WinUSB (which hadn’t been maintained for a long time) got forked on github by slaka.

Since my day-to-day unix-like system is OS X, I’d love a good working solution there too which means I probably need to investigate a bit along these lines:

–jeroen

via: Make A Bootable Windows 10 USB Install Stick On Linux With WinUSB Fork WebUpd8 – Google+  / DoorToDoorGeek “Stephen McLaughlin” – Google+

 

 

Posted in *nix, Apple, BIOS, Boot, BSD, Linux, Mac OS X / OS X / MacOS, OS X 10.10 Yosemite, OS X 10.11 El Capitan, OS X 10.9 Mavericks, Power User, Ubuntu, UEFI, Windows, Windows 10, Windows 7, Windows 8, Windows 8.1, Windows 9, Windows Server 2000, Windows Server 2003, Windows Server 2003 R2, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Vista, Windows XP | Leave a Comment »

moreutils: sponge

Posted by jpluimers on 2016/07/29

sponge, a great *nix tool part of moreutils:

sponge: soak up standard input and write to a file

Now need to figure out how to get it on Tumbleweed; maybe http://rpm.pbone.net/index.php3/stat/4/idpl/23781842/dir/opensuse/com/moreutils-0.48-1.1.i586.rpm.html

–jeroen

via: moreutils.

Posted in *nix, *nix-tools, Linux, openSuSE, Power User, SuSE Linux | Leave a Comment »

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