unimportant
“Error when reading form SSL socket connection” when accessing DRAC5
we still have bunch of servers with DRAC5 cards. after upgrade to java 8u31 java-based kvm console stopped working. it gives: “error when reading from SSL socket connection.” message box during startup and that’s it.
convincing vmware that lun presented by hardware raid is based on ssd
i have esxi 5.5 running on top of dell r620. since few months server has raid1 based on 2x intel s3500 800GB drives. but vmware [or maybe rather the raid controller – dell’s h710p] has seen it as a non-ssd drive: i’ve found a solution here and here: log in to the vmware server via ... Read More
BLKDE3815TYKH0E headaches
we’re setting up a small computer that will act as vpn end-point. we decided to try something smaller this time – BLKDE3815TYKH0E. as it turned out it’s not as well polished as one would expect from intel. my colleagues had to pull out debian wheezy usb pend-rive with the installer to be able to finish ... Read More
sip-audio-session, new libxml2
i’m using nagios to wake me up. not every day – only when there’s some outage. i have pair of nagios servers – one in Sweden, one in Poland – they cross-check one another and – for the most critical problems – send sms and make a phone call. for sms’es i’m using budgetsms.net, for ... Read More
xwiki, html macro tag and unwanted javascript
xwiki – by default – allows contributors to embed arbitrary html, including javascript. it does not take much effort to include something like: then you just need to lure your victim into visiting given wiki page while being logged – you’ll get a http request containing that person’s cookie that can be re-used to impersonate ... Read More
useful tools for [web] malware removal
http://sitecheck.sucuri.net/ for checking if a live website is referring to some malicious js / having unwanted iframes https://www.rfxn.com/projects/linux-malware-detect/ and http://www.clamav.net/index.html and http://www.eset.com/ for scanning files for unwanted conten from the command line:
lxc under debian: flood of “init: Id “4” respawning too fast: disabled for 5 minutes” in the syslog and large /var/log/wtmp
docker seems to be the new fad… which i don’t use at all; but i’m quite happy with lxc and have it deployed in the production on couple of servers.
T-Centralen to Arlanda – available public transport options
there are few options of getting from Stockholm Central station [ T-Centralen ] to the Arlanda airport: Flygbuss – from City Terminalen next to the train station – 105SEK one way SJ / regular train – there are few trains each day going from Stockholm to Uppsala – starting from 125SEK if booked in advance. ... Read More
Service check did not exit properly from nagios plugin in perl
i’m setting up v6 on a few internet-facing servers. i’ve googled a bit and found dual-stack ipv4+ipv6 monitoring with nagios. i’ve started using the wrapper script check_v46 referred there and it works nicely. but i’ve run into a problem – execution of plugin gave me:
bundle file for Comodo’s PositiveSSL / apache2 + mod_ssl
generating csr is easy and well documented:
fsck on truecrypt
it’s high time to move away from truecrypt [ which i’m doing by moving to luks and btrfs on the top of it for extra thrills ], but i still have bunch of places that were not moved to the alternative full disk encryption. what do do when after unclean shutdown this happens: ?
vectorizing text in pdf – the cheap way
we were getting some logo printed and the print shop was not happy with the pdf we’ve provided – they had some problem with the embedded font and asked us to provide another pdf with vectorized curves instead of text. based on this – although the first method with gsview did not work for me ... Read More
forcing specific bonding slave network interface to be used as primary
sometimes after few lan failovers linux decides to use different bonding slave than i’d like it to. solution – remove from the bond interface acting as undesired master and then re-add it: … and nagios stops nagging.
esxi 5.5: Call “HostDatastoreSystem.QueryVmfsDatastoreCreateOptions” for object “ha-datastoresystem” on ESXi “serverName” failed
i’m upgrading 2 PowerEdge R620 servers at work. both had originally 32GB of RAM, 10x 500GB SATA disks running in RAID10 and run vmware esxi. in the first step i’ve upgraded esxi from 5.1 to 5.5 [ bye bye 32GB memory limit ], in the 2nd – i’ve added 8x DELL SNP20D6FC/16G memory sticks to ... Read More
idrac7 + ipmitool stopped working with firmware 1.56.55
i use ipmitool to check health of the poweredge servers from nagios. in essence i execute: and alert if the exist code is non-zero, then i execute and again – i alert on non-zero exit code, i also grep the file in search of lines not containing ok/ns. this was working fine for DRAC 5 ... Read More
Samsung CLX-4195FW – displaying only samsung logo on the front screen
newly arrived Samsung CLX-4195FW greeted me with just blue samsung’s logo on the white background presented on the front LCD screen; at the same time printer correctly acquired IP via DHCP and i could access the management interface via the network. i’ve called Samsung 3x and luckily enough at the 3rd attempt i spoke with ... Read More
mac changing on DW1501 wifi card
in dell’s e6220 that i use for work travels i have dw1501 wifi card. in theory it’s possible to change card’s MAC address in the control panel > network and sharing center > change adapter settings > wireless network connection > properties configure > advanced > locally administered MAC address. problem is the values i’ve ... Read More
open maps + own routes
over time open street maps got better and better; i started to rely on them more than on google maps when hiking around – osm gave me more detailed maps of hiking trails in Barcelona and Singapore, Las Palmas and Slovenia. i wanted to share some of the interesting paths here; the best i could ... Read More