Tag-Archive for » bash «

Thursday, November 12th, 2009 | Author:

If you ever find yourself updating a single application in Arch Linux (a very bad idea, btw) and it upgrades readline you might end up seeing an error along the lines of:
/bin/bash: error while loading shared libraries: libreadline.so.5: cannot open shared object file: No such file or directory
Hopefully you still have a bash prompt open and you haven’t closed them all. If you still can, immediately run the following:
pacman -S bash
else you won’t be able to run bash any more because bash would still be linking to the old version of readline.

Сондай-ақ,, in future, don’t run
pacman -Sy application
(python in my case)
instead, run:
pacman -Syu
which will ensure that all applications are upgraded.

Personally, I think that bash should have had a dependency set saying that it required the old specific version of readline and the same for the new bash, requiring the new version of readline. Regardless, rather play it safe. 😉

үлес
Friday, June 05th, 2009 | Author:

Well it turns out that the problem is a little more subtle than that. It is only the root user that does not have syntax highlighting.

You see, vim does have syntax highlighting but vi and vim are different binaries. A shell startup script only aliases vi to vim if the user id is higher than 100 – which excludes root. The simplest workaround is to just add an explicit alias to root’s .bashrc at /root/.bashrc :

alias vi='vim'

run the command manually or just log in again toactivatethe alias.

Btw, I’m starting to like via lot. For a long time it made no sense to mebut now I am found. 🙂

үлес
Saturday, March 28th, 2009 | Author:

Its amazing how much you can do by combining the small yet powerful commands Unix has available.

This little-used command, time, finally became useful today as a way to report the length of time that certain automated operations are running. In my example, I’m timing how long it takes to build the Linux kernel:

$ time rebuild-kernel26
...
couple-thousand-lines-of-scrolling-text
...
==> Finished making: kernel26 2.6.28.8-1 x86_64 (Sat Mar 28 17:19:52 SAST 2009)
real    62m21.994s
user    43m31.846s
sys     6m1.096s

Yup, that took a little over an hour to build. The values are:

  • realthe actual time elapsed while the command was running – 62 minutes
  • userthe amount of userland time the command used – 43 minutes
  • systhe amount of system time the command used – 6 minutes

(I was busy doing other things while this was happening which is why it took 62 minutes for the desktop to do (43+6=) 49 minutes-worth of work)

If you’re using the GNU version (most likely), it also gives you the option of displaying the results in a custom fashion. Mostly, this command could be useful in scripts where you need to report how long a task tookor maybe? just a geeky way to time something random. 😛

үлес
Category: linux  | Tags: , , , , , , ,  | Leave a Comment
Wednesday, March 18th, 2009 | Author:

[edit] So much for that. It turns out that openssl is able to determine that the key and certificate are already in a single file. Therefore, no csplitting required (well, I hope somebody reading this at least learned about how nice csplit is). In fact, the whole script might as well be obsoleteblaargh. Well, at least it gives a nice warning about not giving a blank passphrase. 😀

Here’s the new version:

pem2pfxconverts a .pem-formatted file containing a private key and signed certificate into a Windows-compatible .pfx certificate file.

#!/bin/bash
#pem2pfx
#v0.2
#Tricky - brendan@swiftspirit.co.za
# Converts a .pem certificate file to .pfx format
# $1 is the source file
set -e
 
if [ $# = 1 ]; then
  outputfile=`echo $1 | sed 's/.pem$/.pfx/'`
 
  echo "Please specify a password below. Windows refuses to import a .pfx certificate with a blank password."
  openssl pkcs12 -export -out $outputfile -in $1
 
 else
  echo "pem2pfx - converts a .pem formatted private-key and certificate file to an IIS-compatible .pfx file."
  echo "Usage: pem2pfx inputfile.pem"
fi

more

үлес
Saturday, February 21st, 2009 | Author:

and my Personal Rating (PR) out of 10 😉

I use Firefox so most of these won’t apply to non-FF users. However, I’d be very very interested to hear what other addons my friends, subscribers, and random websurfers find interesting or useful to them. Have your say and let us know why you love the addons you love. 🙂

Personally, I prefer addons that aren’t intrusive. Ideally, an addon must have a minimal interface and give me a measurable benefit for me to keep it installed.

Cacheviewer – 7

This is a GUI front-end for the Cache Firefox keeps of the last few pages and media. I’ve found this addon more interesting than useful right now so I’m probably going to remove it soon.

ColorfulTabs – 9

I love the colours. The tab colour-grouping doesn’t work very well when you reach about 30 tabs though… :-/

Download Statusbar – 10

I prefer having everything in Firefox in a single window in tabs. Having a download box in a separate window is a big no-no for me. It also saves screen real-estate since it is very minimal. 🙂

Бейне DownloadHelper – 10

Бейне DownloadHelper ағынды мультимедианың іздейді – арнайы жүктелген жатқан кез келген үлкен мазмұны іздейді. Егер сіз белгішесін нұқыған кезде, Ол сізге Қазіргі-қотару ағындарын көрсетеді және сізге ретінде кезекке параметрін береді “қалыпты” жүктеу.

FF ұшырады жиналады немесе қуат кесіп жоспарлап отыр, егер сіз білесіз ешқашан бері, Менің жұмыс үстеліне көшірмесін сақтау үшін қалаймын, мен содан кейін қайтадан бейне жүктеу үшін көп өткізу мүмкіндігін пайдаланбай бейне көруге болады. Сондай-ақ,, жұмыста, адамдар маған YouTube немесе басқа БАҚ-қа Сілтемелерді жібергенде, Мен әдетте кейін көп дейін көріп алаңдатпай емес – менің өз бос немесе үзіліс кезінде.

Бітетін Канар – 9

сіз көріп тұрған сайт үшін SSL куәлігі жақын арада аяқталады жоспарлап отыр, егер Бұл ұқыпты және аз аддона сізге әңгімелейді. Сіздің жеке сайты бар SSL куәлігі бар болса, Мен сізге хабарлау немесе недопонимания қарапайым болмауына байланысты аяқталады сіздің сайт SSL сертификатын болдырмау үшін осы аддон пайдалануды ұсынамыз.

Fasterfox – 8

Fasterfox adds some network optmisation options. Some of the options could make your corporate network admin a little mad with you though. 😉

Firebug – 9

беттері бар веб дамыту мен эксперименттер. Кішкентай код биты, сондай-ақ күйін келтіру беттерді сынау үшін Awesome.

FoxClocks – 6

errtells you the time in other time zones. o.O Was useful for a short timenow its redundant since my head is working it out faster than I can glance. rm -f

FoxyProxy – 9

Арнайы прокси-серверлер арқылы нақты беттерін шолуды үшін Awesome. This is useful for when some sites are blocked or the SAIX Transparent Proxy servers aren’t working properly. 🙂

Мен бағыты мен тезірек әдепкі маршруттары арқылы өту емес келеді прокси сервер кейбір трафикті осы пайдалану. Its also very flexible. Егер сіз бір прокси қол жетімді сервер және сіз әдетте пайдаланатын артық болса кенеттен издыхании жүріп, ғана келесі бір көшу. 🙂

Greasemonkey – 10

Right now, I use this only for the GooglemonkeyR script. This script reformats Google‘s search results to your specifications and also has an option to show small thumbnail of the pages Google links to. Greasemonkey can do a lot more and there are plenty of scripts readily available for many many sites.

Live HTTP headers – 8

I’ve used this a few times to diagnose gzip compression issues with IIS web servers. Not much else to say though: It works.

Live PageRank – 10 (so faronly installed it yesterday)

This addon seems simple enough. It gets the PageRank from Google and shows it in the tray.

NoScript – 10

NoScript объявлений тежеу ​​кезіндегі тамаша. Сіз ұнайды барлық сайттарды ақ тізімге керек, өйткені алдымен оның сәл тітіркендіргіш – but in the long run it is soooo worth it. 🙂

Беттер тірілткен – 10

Егер сіз сайтқа шолып және ол төмен болып шықса үшін өте пайдалы. сайт статикалық-мазмұн-бағдарланған болса, онда бұл оның онлайн кэштелген болса тез мазмұнды табуға жеңілдетеді.

Tab Mix Plus – 8

Awesome for if you have more than 7-or-so tabs.

ShowIP (using a version modified for work purposesdisplays company server’s canonical name when browsing) – 10

I cannot imagine the hell I’d have to go through to identify a server without this plugin. Okay, I can. Used to have to do this all the time. I eventually scripted it but I can’t find the original script. Here’s my 60-second attempt at recreating what was in that script:

$ cat /etc/hosts | grep `dig A $hostname @mycachingnameserver | grep . | grep -v "^;"`
$ dig -x `dig A $hostname @mycachingnameserver | grep ^$hostname | grep A | \
  awk '/[.]/{print $5}'` @mycachingnameserver | grep . | grep -v "^;"

Web Developer – 9

I used this once to diagnose some issues with a page. I don’t do much web development so I’m going to remove this one. Its no comment on its capabilities since I believe this is a top notch add-on if you’re doing a lot of web development work.

үлес