Posted by jpluimers on 2016/07/05
pip is a great tool for installing Python packages.
But upgrading them still isn’t so great. Here are two statements: the first to list packages needing an update. The second updating them:
pip freeze –local | grep -v ‘^\-e’ | cut -d = -f 1 | xargs -n1
pip freeze –local | grep -v ‘^\-e’ | cut -d = -f 1 | xargs -n1 pip install -U
If you’re interested in pip, it is easy to install if it isn’t already included in your version of Python that is..
–jeroen
via:
Posted in Development, Python, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2016/06/23
Recently I did my very first JavaScript in HTML development. Since it was a one page experiment, I didn’t want to put it in an official repository of it’s own…
which reminded me of JavaScript is not Java – A humorous comparison of JavaScript and Java.
And still lots of uneducated people think they are the same, for instance the NBC Chicago publishes this at the start of the year:
Java Developer; What they do: Program websites using JavaScript.
They fixed it later but then the harm was already done (besides making a lot of fun of themselves and others making fun out of them too):
Java Developer; What they do: Write programs used by mobile devices, websites and mainframes.
Source: Report Reveals 10 Most In-Demand Jobs in Chicago for 2016 | NBC Chicago
–jeroen
Posted in Development, Java, Java Platform, JavaScript/ECMAScript, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2016/06/22
Some notes with the links I found them:
"$@" when passing on arguments to other processes: scripting – Propagate all arguments in a bash shell script – Stack Overflow.$* is very confined: Accessing bash command line args $@ vs $* – Stack Overflow.$0 is the command itself; it is not included in $@ or $*: linux – Script parameters in Bash – Stack Overflow.| Syntax | Effective result |
|---|---|
$* |
$1 $2 $3 … ${N} |
$@ |
$1 $2 $3 … ${N} |
"$*" |
"$1c$2c$3c…c${N}" |
"$@" |
"$1" "$2" "$3" … "${N}" |
–jeroen
Posted in bash, Development, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2016/06/16
Since quite a few commands that you regularly see mentioned on the web have been removed from OpenSuSE net-tools, I’ve created a few bash aliases in /etc/bash.bashrc.local below.
Note the original commands are not good have been deprecated for years on various distros and therefore removed:
# stuff removed from net-tools # see https://features.opensuse.org/317197 and https://build.opensuse.org/package/view_file/network:utilities/net-tools/net-tools.changes ## Because of changes on Thu Apr 10 12:33:41 UTC 2014 alias "arp=echo 'use \"ip neigh\" or \"ip -r neight\"' && ip neigh" alias "ifconfig=echo 'use \"ip a\"' && ip a" alias "netstat= echo 'use \"ss\" or \"ss -r\"' && ss" alias "route=echo 'use \"ip r\"' && ip r" ## Because of changes on Sun Mar 29 00:41:21 UTC 2015 alias "ipmaddr=echo 'use \"ip maddr\"' && ip maddr" alias "iptunnel=echo 'use \"ip tunnel\"' && ip tunnel"
Some bits of the net-tools change-log:
------------------------------------------------------------------- Sun Mar 29 00:41:21 UTC 2015 - jengelh@inai.de - ipmaddr and iptunnel are obsolete too, move them to subpackage. (Superseded by `ip maddr` and `ip tunnel`) - remove redundant %clean section ------------------------------------------------------------------- Thu Apr 10 12:33:41 UTC 2014 - mmarek@suse.cz - Move arp, ifconfig, netstat and route to a -deprecated subpackage (fate#317196, fate#317197) - Drop the rarp tool, which has been broken since kernel 2.3
Note that the -lntu parameter seems to be the same for both ss and netstat: [WayBack] Get a list of Open Ports in Linux – Super User
–jeroen
via File net-tools.changes of Package net-tools – openSUSE Build Service.
Posted in *nix, *nix-tools, bash, bash, Development, Linux, openSuSE, Power User, Scripting, Software Development, SuSE Linux | Leave a Comment »
Posted by jpluimers on 2016/06/14
Quoting John Hart‘s brilliant answer:
Using
--resolveleverages all of the normal logic that applies, but simply pretends the DNS lookup returned the data in your command-line option. It works just like/etc/hostsshould.Note
--resolvetakes a port number, so for HTTPS you would useHttps:
curl --resolve 'yada.com:443:127.0.0.1' https://yada.com/somethingHttp:
curl --resolve 'yada.com:80:127.0.0.1' http://yada.com/something
It requires curl 7.21.3 or higher (from the end of 2010). Which by now everybody should have.
–jeroen
more via: Set cURL to use local virtual hosts – Stack Overflow.
Posted in *nix, bash, cURL, Development, Power User, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2016/06/07
Via the answer below I created the renew alias. I already had the first two aliases.
alias route-and-ipaddresses="netstat -nr | grep 'Internet\|Gateway\|default' && echo && ifconfig | grep '\: flags\|inet\|inet6' && echo more detailed info through ifconfig and netstat -nr" alias whatismyip="curl http://whatismyip.akamai.com && echo" alias renew_dhcp="sudo ipconfig set en0 DHCP && echo waiting 10 seconds for DHCP lease to be obtained && sleep 10 && route-and-ipaddresses && whatismyip"
–jeroen
via: network – How can I release and renew my DHCP lease from Terminal? – Ask Different.
Posted in Apple, bash, Development, Mac, Mac OS X / OS X / MacOS, Mac OS X 10.6 Snow Leopard, 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 | Leave a Comment »
Posted by jpluimers on 2016/06/01
I needed to find the symlinks in /etc pointing to directories and know both the name and place they point to.
revue:~ # ls -al `find -L /etc/ -xtype l -type d` find: ‘/etc/ssh/broken/ssh_host_dsa_key’: Too many levels of symbolic links find: ‘/etc/ssh/broken/ssh_host_ecdsa_key’: Too many levels of symbolic links find: ‘/etc/ssh/broken/ssh_host_key’: Too many levels of symbolic links find: ‘/etc/ssh/ssh_host_ecdsa_key’: Too many levels of symbolic links find: ‘/etc/ssh/ssh_host_dsa_key’: Too many levels of symbolic links find: ‘/etc/ssh/ssh_host_key’: Too many levels of symbolic links lrwxrwxrwx 1 root root 19 May 7 15:43 /etc/apparmor.d/cache -> /var/cache/apparmor lrwxrwxrwx 1 root root 6 Sep 28 2014 /etc/rc.d -> init.d lrwxrwxrwx 1 root root 26 May 23 13:50 /etc/squid/errors -> /usr/share/squid/errors/de lrwxrwxrwx 1 root root 28 Mar 25 22:07 /etc/ssl/certs -> /var/lib/ca-certificates/pem lrwxrwxrwx 1 root root 18 Apr 30 14:20 /etc/xdg/systemd/user -> ../../systemd/user
–jeroen
via: bash – How do I find all of the symlinks in a directory tree? – Stack Overflow.
Posted in *nix, *nix-tools, bash, bash, Development, Linux, openSuSE, Power User, Scripting, Software Development, SuSE Linux | Leave a Comment »
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 donePass 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 2016/05/12
[WayBack] Pandoc is so versatile that you sometimes forget a conversion can be as simple as a one-liner:
pandoc -s README.rst -o readme.html
This converts the reStructured text in README.rst to html.
Pandoc is smart enough to recognise the conversions without you telling the formats with -f (input format) and -t (output format) explicitly.
If you do need to explicitly specify the format, it is useful to query which formats are supported as per [WayBack] Pandoc – Pandoc User’s Guide: specifying formats:
pandoc --list-input-formatspandoc --list-output-formatsPosted in Development, PDF, Power User, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2016/05/11
Sometimes you want to run a batch file from a Task Scheduler task. For that, the user under which the task runs needs to Logon as a batch job right. If it hasn’t, you get this nice error message:
“This task requires that the user account specified has log on as batch job rights”.
Despite being part of the Windows Server 2003 Resource Kit Tools, you can still use ntrights in more modern Windows versions to grant or revoke this right.
As ntrights uses a hard to remember SeBatchLogonRight name for it and I tend to forget the ntrights syntax, I wrote two batch files to grant or revoke the Logon as Batch Job rights for the specified user:
Posted in Batch-Files, Development, Power User, Scripting, Software Development, Windows, Windows 7, Windows 8, Windows 8.1, Windows 9, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Windows Vista | Leave a Comment »
The Wiert Corner - irregular stream of stuff 