X-Git-Url: http://git.grml.org/?a=blobdiff_plain;f=grml_tips;h=cdb37e80961645dafefea7f9e0e942bffe35ffe7;hb=3afdc13d424d74183874631841ca0d5f949158a7;hp=5a12dca5f4b02786b893aaa60a5f197c2a17b52e;hpb=8c5e9082ffa6acdde2322529133b89541a5dc75d;p=grml-tips.git

diff --git a/grml_tips b/grml_tips
index 5a12dca..cdb37e8 100644
--- a/grml_tips
+++ b/grml_tips
@@ -1311,6 +1311,10 @@ product ID when loading the usbserial module. Usage example:
 Bus 004 Device 008: ID 1199:6813 Sierra Wireless, Inc.
 
 # modprobe usbserial vendor=0x1199 product=0x6813
+
+To get a list of available providers execute:
+
+# gcom -s -d /dev/ttyUSB0 /usr/share/doc/gcom/examples/operator
 -- 
 hdparm - get/set hard disk parameters
 
@@ -2651,7 +2655,8 @@ See: man grml-terminalserver + http://grml.org/terminalserver/
 -- 
 Debugging SSL communications:
 
-% openssl s_client -connect server.adress:993
+% openssl s_client -connect server.adress:993 > output_file
+% openssl x509 -noout -text -in output_file
 
 or
 
@@ -2714,7 +2719,7 @@ Enable shadow passwords:
 
 # shadowconfig on
 -- 
-Set up an IPv6 tunneln on grml:
+Set up an IPv6 tunnel on grml:
 
 # ipv6-tunnel start
 -- 
@@ -2982,3 +2987,124 @@ user@host.example.com:~#
 Notice: using 'ssh -D 8080 ..' you will get a socks5-proxy listening on
 localhost:8080 which you can use to tunnel everything through your "dns-uplink".
 -- 
+Configure a MadWifi device for adhoc mode:
+
+Disable the autocreation of athX devices:
+# echo "options ath_pci autocreate=none" > /etc/modprobe.d/madwifi
+
+Remove the autocreated device for now:
+# wlanconfig ath0 destroy
+
+Configuration in /etc/network/interfaces:
+
+iface ath0 inet static
+  madwifi-base wifi0
+  madwifi-mode adhoc
+  ...
+
+Hints:
+  - Do not use interface names without ending 0 (otherwise startup fails).
+  - Only chooss unique names for interfaces.
+-- 
+Find dangling symlinks using zsh:
+
+% ls **/*(-@)
+-- 
+Use approx with runit supervision
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Install the packages:
+# apt-get install approx runit
+
+Add user approxlog for the logging daemon:
+# adduser --system --home /nonexistent --no-create-home approxlog
+
+Create config directory:
+# mkdir /etc/sv/approx
+
+Use /var/run/sv.approx as supervise directory:
+# ln -s /var/run/sv.approx /etc/sv/approx/supervise
+
+# cat > /etc/sv/approx/run << EOF
+#!/bin/sh
+echo 'approx starting'
+exec approx -f 2>&1
+EOF
+
+You normally do not need a logging service for approx because it logs
+to syslog too. So just for completion:
+# mkdir -p /etc/sv/approx/log
+# ln -s /var/run/sv.approx.log /etc/sv/approx/log/supervise
+# cat > /etc/sv/approx/log/run << EOF
+#!/bin/sh
+set -e
+LOG="/var/log/approx"
+test -d "$LOG" || mkdir -p -m2750 "$LOG" && chown approxlog:adm "$LOG"
+exec chpst -uapproxlog svlogd -tt -v "$LOG"
+EOF
+
+Now activate the new approx service (will be started within 5s):
+# ln -s /etc/sv/approx/ /var/service/
+
+Make approx managed via runit available via init-script interface:
+# dpkg-divert --local --rename /etc/init.d/approx
+# ln -s /usr/bin/sv /etc/init.d/approx
+-- 
+Remote-reboot a grml system using SysRQ via /proc (execute as root):
+
+eject &>/dev/null
+umount -l /cdrom
+eject /dev/cdrom
+echo b > /proc/sysrq-trigger
+-- 
+Show what happens on /dev/sda0:
+
+# mount the debugfs to relay kernel info to userspace
+mount -t debugfs none /sys/kernel/debug
+
+# is a convenient wrapper arround blktrace and blkparse
+btrace /dev/sda0
+-- 
+Convert Flash to Avi:
+
+% ffmpeg -i input.flv output.avi
+-- 
+Usage example for cryptsetup / -luks encrypted partition on LVM:
+
+volume group name:   x61
+logical volume name: home
+
+echo "grml-crypt_home /dev/mapper/x61-home none luks" >> /etc/crypttab
+Start cryptdisks
+mount /dev/mapper/grml-crypt_home /mnt/test
+-- 
+fdisk/parted/... complains with something like
+'unable to open /dev/sda - unrecognised disk label'?!
+
+See http://grml.org/faq/#fdisk =>
+
+* use /sbin/fdisk.distrib from util-linux
+* switch to sfdisk, cfdisk,...
+* use parted's mklabel command (but please read the
+  parted manual before executing this command)
+-- 
+dmraid - support for SW-RAID / FakeRAID controllers
+like Highpoint HPT and Promise FastTrack
+
+Activate all software RAID sets discovered:
+# dmraid -ay
+
+Deactivates all active software RAID sets:
+# dmraid  -an
+
+Discover all software RAID devices supported on the system:
+# dmraid -r
+-- 
+Extract winmail.dat:
+
+List content:
+% ytnef winmail.dat
+
+Extract files to current directory:
+% ytnef -f . winmail.dat
+--