Archive for the ‘Linux’ Category

Gentoo / ArchLinux – NetworkManager and policykit

If you want to use the NM (especially the nm-applet) in Gentoo or ArchLinux, you have to grant the user to access the NM. Therefor you create the following file # cat /etc/polkit-1/localauthority/50-local.d/org.freedesktop.NetworkManager.pkla [nm-applet] Identity=unix-group:plugdev Action=org.freedesktop.NetworkManager.* ResultAny=yes ResultInactive=no ResultActive=yes Thats necessary because polkit-auth was removed from the policykit package. Also you must add the user [...]

Gentoo Binary Packages

GCC (4.5.3) flags for * Intel(R) Core(TM) i7 CPU M 620 * Intel(R) Core(TM) i7 CPU 920 * Intel(R) Core(TM)2 Duo CPU T7700 CFLAGS="-march=core2 -mtune=generic -O2 -pipe -msse -msse2 -msse3 -mssse3 -msse4.1 -msse4.2 -msse4 -mmmx" CXXFLAGS="${CFLAGS}" CHOST="x86_64-pc-linux-gnu" USE flags USE="64bit X a52 aac alsa apng bash-completion bluetooth chroot connection-sharing consolekit dbus dhcpcd dts dvb dvd [...]

archlinux – Acrobat Reader

Sometimes its necessary/pleasanter to use the Acrobat Reader for some PDF files like forms… Enable the multilib repository # cat /etc/pacman.conf [...] [multilib] Include = /etc/pacman.d/mirrorlist [...] # pacman -Sy Install necessary packages # pacman -S lib32-libxml2 lib32-gtk2 lib32-gdk-pixbuf2 Maybe there are some more packages still missing on your system! Download and install Acrobat Reader [...]

pv – monitor the progress of data through a pipe

I’ve found a very nice tool pv… $ dd if=/dev/sda1 | pv | dd of=backup.img 359MB 0:00:05 [75.3MB/s] [ <=> ]

libvirt – QEMU Monitor Protocol (QMP)

Because libvirt self is using the qemu monitor to mange the guests, it is not available for the user. Since version 0.8.6 [1] its possbile to send a command throught libvirt to the monitor. virsh qemu-monitor-command <domain> <command> The problem is that you must use the QMP format to send a command like $ virsh [...]

Firefox is loading painfully slowly…

aka Firefox, DNS lookups and IPv6 (under Arch) Since my laptop is running with Arch, sometimes my Firefox makes me crazy when i’m trying to open a new page because it show a message like Looking up heise.de… for minutes ! After googling a few seconds i’ve found someting that is working for me… Go [...]

Force a reboot/shutdown

force reboot $ echo 1 > /proc/sys/kernel/sysrq $ echo b > /proc/sysrq-trigger force shutdown $ echo 1 > /proc/sys/kernel/sysrq $ echo o > /proc/sysrq-trigger

ERROR: boot device didn’t show up after 30 seconds

If you’re trying to boot the Archlinux 2010.05 CD/DVD/Netinstall and getting the message ERROR: boot device didn’t show up after 30 seconds … try this one to fix the problem $ udevadm trigger $ exit

openssl with version information under sles11sp1

If you getting errors like this one $ /path/to/program /usr/lib/libcrypto.so.0.9.8: no version information available you need a libcrypto.so and a libssl.so with version information. Here are some information about the problem. openssl has evolved to a very important library in Linux distribution. A lot of cryptographic applications link to it including system libraries like pam [...]

JBoss Cluster – ServerPeerID

$SERVER/deploy/messaging/messaging-service.xml <attribute name="ServerPeerID">${jboss.messaging.ServerPeerID:0}</attribute> For clustered environment each jboss node need a unique ServerPeerID which must be a valid integer.