unimportant – Page 7

lxc under debian: flood of “init: Id “4” respawning too fast: disabled for 5 minutes” in the syslog and large /var/log/wtmp

2014-09-232014-11-04 by .pQd

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

2014-08-232014-08-23 by .pQd

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

2014-07-222015-05-03 by .pQd

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

2014-07-172016-09-02 by .pQd

generating csr is easy and well documented:

fsck on truecrypt

2014-07-102014-07-10 by .pQd

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

2014-06-25 by .pQd

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

2014-05-172014-05-17 by .pQd

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

2014-05-112014-05-11 by .pQd

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

timing execution of piped commands

2014-05-072014-05-07 by .pQd

idrac7 + ipmitool stopped working with firmware 1.56.55

2014-04-232014-07-07 by .pQd

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

2014-04-21 by .pQd

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

2014-04-192014-04-19 by .pQd

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

2014-04-042017-03-11 by .pQd

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

openvpn throttled from ovh’s bhs datacenter?

2014-03-162015-11-02 by .pQd

for work we rent a dedicated server from OVH. it’s been 5 months now and i’m pretty satisfied with the service provided. at the initial stage we’ve bumped into a problem that was never really solved; i cannot be even 100% sure if it’s OVH’s fault. UDP-based OpenVPN connection established from OVH’s BHS datacenter to ... Read More

wordpress hangs when uploading an image

2014-02-172014-02-17 by .pQd

i’ve moved my wordpress to a new server few weeks ago. all appeared to work fine but i forgot changing the configuration and providing new upload dir path. result? the media page [ wp-admin/upload.php ] did not open and apache2 appeared to be hanged using 100% cpu. i could not add any media in the ... Read More

clipboard service, rdp

2014-01-14 by .pQd

did the clipboard suddenly stopped passing text between your local computer and the remote desktop session? the first thing i do in such case is: start the task manager on the remote host go to processes, find rdpclip.exe and kill it start again rdpclip.exe on the remote host and try copy and paste again

squeezing water out of jepgs, pngs

2013-12-30 by .pQd

jpegoptim can reduce size of JPG files. if used without -m option it’s lossless. apt-get install jpegoptim find . -type f -exec jpegoptim -m80 {} ‘;’ for pngs there are few tools out of which i found pngcrush to give best results. unfortunately it does not work ‘in-place’ and temporary file needs to be created ... Read More

hibernation for windows 2012 server

2013-12-22 by .pQd

run cmd as admin and there: after that control panel>hardware>power options>change advanced power settings and hibernate is available that did a trick for windows 2012 server on an old poweredge 1950 server. unfortunately wake on lan refused to work despite of: in the control panel > network and internet > network connections for the lan ... Read More

2013-11-012013-11-01 by .pQd

i’m setting up some rented server. it has 2x ssd drives on which i’ll be running raid1 with mdadm with ext4. installation of debian wheezy went fine but i wanted to use fstrim to prevent write performance degradation over time. it did not work under 3.2.0 kernel giving me: after quick googling i learned that ... Read More

vmware esxi 5.1 keeping mac address after moving to a new hardware

2013-08-312013-08-31 by .pQd

i had to move hard disks containing installed esxi 5.1 from one server to another. after i booted up a new server there was an unexpected surprise for me… vmware ‘kept’ the mac address assigned to the management interface from the old machine. so for a while i had duplicate mac address: legitimately on the ... Read More