Archive for the ‘SuSE Linux’ Category
Posted by jpluimers on 2016/05/26
Thanks Adrian W for providing the below example in your answer about obtaining GLUE record information for a domain.
It is an excellent showcase for the $IFS Internal Field Separator available in any nx shell.
In this case it is used to get the TLD (top-level domain) from the domain name specified at the command-line.
After that, it obtains the name servers for that TLD, and queries the glue records there, both using dig.
Here is a little shell script which implements Alnitak’s answer:
#!/bin/sh
S=${IFS}
IFS=.
for P in $1; do
TLD=${P}
done
IFS=${S}
echo "TLD: ${TLD}"
DNSLIST=$(dig +short ${TLD}. NS)
for DNS in ${DNSLIST}; do
echo "Checking ${DNS}"
dig +norec +nocomments +noquestion +nostats +nocmd @${DNS} $1 NS
done
Pass the name of the domain as parameter:
./checkgluerecords.sh example.org
–jeroen
via domain name system – How to test DNS glue record? – Server Fault.
Posted in *nix, Apple, bash, Development, DNS, Linux, Mac, Mac OS X / OS X / MacOS, Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, openSuSE, OS X 10.10 Yosemite, OS X 10.8 Mountain Lion, OS X 10.9 Mavericks, Power User, Scripting, Software Development, SuSE Linux | Leave a Comment »
Posted by jpluimers on 2016/05/03
After a recent big update to OpenSuSE Tumbleweed, I could not ssh into my system any more.
Symptoms
The ssh client side would report a Read from socket failed: Connection reset by peer which I misinterpreted as the sshd not running at all.
Luckily the server is a VM, so I could reach the console. There I saw this:
sshd trying to load files it shouldn’t
The files should not be loaded as they are not specified in the sshd_config file:
dsa and ecdsa not specified in the config file
So I knew something was broken. After reading some messages in the forums.opensuse.org I got at Bug 977812 – sshd killed by SIGSYS on client connection
The cause
As usual with such issues the cause seems a combination of factors:
And we have the culprit, I believe: together with the glibc upgrade, openssl
was updated from 1.0.2g-1.1 to 1.0.2-2.12 which brought, among others, patch
openssl-urandom-reseeding.patch.
Temporary fix
A temporary fix is to comment out a line in /etc/sshd_config so you get this diff:
-UsePrivilegeSeparation sandbox # Default for new installations.
+# UsePrivilegeSeparation sandbox # Default for new installations.
Be sure to undo this as soon as you’ve received a final fix.
Final fix
A final fix is being fast-tracked so it appears in Tumbleweed soon.
I will report after deployment of [opensuse-factory] New Tumbleweed snapshot 20160502 released! as I think it contains the fix.
Aftermath
I already knew about openQA: Test summary which lists the builds, but not the changes in the builds.
Reading through Information Board or the like for Tumbleweed I found the openSUSE Mailinglist Archive: opensuse-factory which does the announcements and release notes for Tumbleweed.
It had both the announcement of the “big patch”, ssh bug report and temporary fix:
–jeroen
Posted in *nix, Communications Development, Development, Internet protocol suite, Linux, openSuSE, Power User, SSH, SuSE Linux, TCP, Tumbleweed | 2 Comments »
Posted by jpluimers on 2016/04/11
Manually you can do it like this: How To Use Git to Manage your User Configuration Files on a Linux VPS | DigitalOcean.
But there is also etckeeper. There is even a set of manual installation steps for opensuse: backup – etckeeper for opensuse – bash script install and configure – Unix & Linux Stack Exchange.
Three important etckeeper gotchas with powerful scripts like pre-commit /etc/etckeeper/pre-commit.d:
- Ensure you give them executable permissions like chmod 755.
- Ensure they are valid sh scripts.
- Do not give them the .sh extension:
- fails:
/etc/etckeeper/pre-commit.d/10rsync-var-lib-named-master
- works:
/etc/etckeeper/pre-commit.d/10rsync-var-lib-named-master.sh
–jeroen
via:
Posted in *nix, *nix-tools, etckeeper, Linux, openSuSE, Power User, SuSE Linux | Leave a Comment »
Posted by jpluimers on 2016/03/14
As etckeeper wasn’t available in the “normal” OpeenSuSE 13.1 package, I used the steps below to upgrade to 13.2 after reading SDB:System upgrade – openSUSE and How To Upgrade To openSUSE 13.2 From openSUSE 13.1 | Unixmen.
Note I installed inside tmux (to prevent any ssh disconnects from screwing the upgrade process):
Read the rest of this entry »
Posted in *nix, etckeeper, Linux, openSuSE, Power User, SuSE Linux | Leave a Comment »
Posted by jpluimers on 2016/03/10
Since ESXi is based on busybox, it is using ash a variation of sh (the classic bourne shell) called Almquist shell and most nxes use some form of bash a lot of things won’t work.
For instance, doesn’t support sh –version.
Luckily there are uname -mrs and (more elaborate) vmware -vl to get the version.
Note there is support busybox aliases so alias dir=”ls -laF” works, and you can define aliases for the version information too.
–jeroen
via:
Posted in *nix, *nix-tools, bash, Linux, Power User, SuSE Linux, Virtualization, VMware, VMware ESXi | Leave a Comment »
Posted by jpluimers on 2016/03/07
Reminder: install mosh and get it working when it runs behind a firewall.
Mobile shell that supports roaming and intelligent local echo. Like SSH secure shell, but allows mobility and more responsive and robust.
Links:
Then see how well it stacks up against or complements with the ssh/tmux combo.
–jeroen
Read the rest of this entry »
Posted in *nix, Linux, openSuSE, Power User, SuSE Linux, Tumbleweed | Leave a Comment »
Posted by jpluimers on 2016/01/25
The solution: add both the +noall and +answer flags before the query.
dig +noall +answer google.de
–jeroen
via dig show only answer – Server Fault.
Posted in *nix, *nix-tools, Apple, Linux, Mac, Mac OS X / OS X / MacOS, Mac OS X 10.4 Tiger, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, OS X 10.10 Yosemite, OS X 10.8 Mountain Lion, Power User, SuSE Linux | Leave a Comment »
Posted by jpluimers on 2016/01/13
Many sites giving your public IP address return a web page with a bloat of html. From the command-line, you are usually only interested in the IP-address itself. Few services return exactly that.
Below are command-line examples to provide the public IP address mostly from a *nix perspective. Usually you can get similar commands to work with Windows binaries for wget and Windows binaries for curl.
In the end, I’ve opted for commands in this format, as I think akamai will last longer than the other sites (but does not include an end-of-line in the http result hence the echo on Mac/*nix):
I’ve not tried aria2 yet, but might provide commands for that in the future.
These are the Linux permutations for akamai:
curl whatismyip.akamai.com && echo
curl ipv4.whatismyip.akamai.com && echo
curl ipv6.whatismyip.akamai.com && echo
curl ipv4.whatismyip.akamai.com && echo && curl ipv6.whatismyip.akamai.com && echo
The last two are convenient when you have both IPv4 and IPv6 configured on “the outside”.
You can replace curl with wget -q -O – (which outputs to stdout) for each command. You can even ommit the http:// (as that is the default protocol for both curl and wget).
Read the rest of this entry »
Posted in *nix, *nix-tools, Apple, bash, bash, Batch-Files, cURL, Development, Linux, Mac, Mac OS X / OS X / MacOS, Mac OS X 10.4 Tiger, Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, MacBook, MacBook Retina, MacBook-Air, MacBook-Pro, MacMini, OS X 10.10 Yosemite, OS X 10.8 Mountain Lion, OS X 10.9 Mavericks, Power User, Scripting, Software Development, SuSE Linux, wget | Leave a Comment »
Posted by jpluimers on 2015/12/13
Hmm:
Detected 1 file conflict:
File /etc/netconfig
from install of
libtirpc3-1.0.1-1.1.x86_64 (Main Repository (OSS))
conflicts with file from install of
libtirpc1-0.2.5-1.1.x86_64 (openSUSE-20150508-0)
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.
Changes: go figure (:
revue:/etc # diff netconfig.201507191158 netconfig
13,14d12
< udp6 tpi_clts v inet6 udp - -
udp6 tpi_clts v inet6 udp - -
> tcp6 tpi_cots_ord v inet6 tcp - -
–jeroen
Posted in *nix, Linux, openSuSE, Power User, SuSE Linux | Leave a Comment »
The Wiert Corner - irregular stream of stuff 