https://www.hep.lu.se/staff/paganelli/ 2026-04-14T21:11:51+00:00 https://www.hep.lu.se/staff/paganelli/ https://www.hep.lu.se/staff/paganelli/lib/tpl/pfdokuwiki/images/favicon.ico text/html 2024-09-27T12:03:10+00:00 https://www.hep.lu.se/staff/paganelli/doku.php/it_tips:luvpn?rev=1727438590&do=diff Connecting to the LU VPN :!: 20200508 These instructions have been updated. LU changed the way to connect to the VPN. I am investigating whether encryption is enforced. :!: The Lund University VPN is a system to secure connect from outside the LU network to services and machines inside the LU network. It should be used when travelling or when connecting from non secure places. text/html 2014-03-27T11:08:53+00:00 https://www.hep.lu.se/staff/paganelli/doku.php/it_tips:screen?rev=1395918533&do=diff Screen Screen is the best sysadmin and cluster user companion. It does a magical thing: if you disconnect abruptly from a server, it will keep everything running as is you've never disconnected. Think of it as an open window to your work on a remote machine, to which only you can have access. text/html 2019-02-06T17:52:12+00:00 https://www.hep.lu.se/staff/paganelli/doku.php/it_tips:shelltricks?rev=1549475532&do=diff Various useful shell tricks How do I switch to a different group I belong to? In unix inspired operating systems one can see whose groups they belong to by using the id command: [pflorido@pptest-iridium ~]$ id uid=6312(pflorido) gid=34000(clusterusers) groups=34000(clusterusers),6300(hep),6500(npusers),46300(ppguests) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 [pflorido@pptest-iridium ~]$ touch testgrp [pflorido@pptest-iridium ~]$ ls -l testgrp -rw-r-----. 1 pflorido clus… text/html 2023-10-09T14:27:37+00:00 https://www.hep.lu.se/staff/paganelli/doku.php/it_tips:ssh?rev=1696861657&do=diff Better SSH experience This page contains some suggestions on how to improve your SSH experience. The ssh config file You user own configuration file is located in your home folder at the path ~/.ssh/config In some cases this file does not exist, you can create it for example by issuing text/html 2020-06-12T12:46:30+00:00 https://www.hep.lu.se/staff/paganelli/doku.php/it_tips:storcliqr?rev=1591965990&do=diff MegaRAID storCLI quick reference binary usually located in /opt/MegaRAID/storcli/storcli64 Useful commands Find controller id storcli show all List all controller info /c0 stands for controller with id 0 storcli /c0 show all List all volumes info text/html 2020-06-22T21:16:47+00:00 https://www.hep.lu.se/staff/paganelli/doku.php/it_tips:swraidqr?rev=1592860607&do=diff Linux Software RAID Quick Reference title code Enumerate RAIDs mdadm -E /dev/sd[a-c][0-3] Check RAID activity cat /proc/mdstats Detail RAID device mdamd --detail /dev/md125 grep for State create mdadm.conf mdadm --detail --scan --verbose >> /etc/mdadm.conf text/html 2020-08-20T16:55:03+00:00 https://www.hep.lu.se/staff/paganelli/doku.php/it_tips:xwindowswithmswindows?rev=1597942503&do=diff X Windows and Microsoft Windows X Windows, or X.Org, is the graphical system widely used by GNU/Linux and UNIX Operating Systems. Usually Linux machines and Apple OSX have a native system that would allow a client to remotely login and execute X.Org programs on her own machine.