Category Archives: Linux

Stuff about Linux

Linux: Set systemd target (init/runlevel level) at grub command line

Hi,

if you temporary don’t want to boot to a graphical login manager you can, at the grub command line, tell the systemd-target the system should boot to.

Continue reading Linux: Set systemd target (init/runlevel level) at grub command line

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Linux: Enable i2c kernel tracing

Hi,

when you want to see whats happened on the i2c bus on an raspberry pi you can enable tracing with debugfs.

Get root and mount debugfs. This is usually already mounted in raspbian

michael@debdev ~ # sudo su
root@debdev ~ # mount -t debugfs none /sys/kernel/debug

Continue reading Linux: Enable i2c kernel tracing

Linux: ssh error “too many authentification error”

Hi,

if you cannot logon to a linux machine and you got an error:

ssh - too many authentification failures
ssh – too many authentification failures

Continue reading Linux: ssh error “too many authentification error”

sed: Editing text files

Hi,

here some often requested basic examples on how to edit text files with sed.
Continue reading sed: Editing text files

Linux: X11 forwarding not working with putty

Hi,

you have properly configured putty to use X11 forwarding but it fails?

Continue reading Linux: X11 forwarding not working with putty