Improved grep version:
% glark
+--
+Grep with highlighting:
-glark grep extract-matches
+% grep --color=auto ...
+% hgrep ...
--
-Highlith
+Extract matches when grepping:
-grepc
-hgrep
+Usage examples:
+% ifconfig | grepc 'inet addr:(.*?)\s'
+% ifconfig | glark --extract-matches 'inet addr:(.*?)\s'
--
Output text as sound:
% startx 2>~/.xsession-errors &| exit
--
-Which process is writing to disk?
+Which process is writing to disk and/or causes the disk to spin up?
+
+First of all use lsof to check what's going on. Does not help? ->
# echo 1 > /proc/sys/vm/block_dump
-Warning: you must disable syslogd before you do this, or you must
-make sure that kernel output is not logged.
+The command sets a sysctl to cause the kernel to log all disk
+writes. Please notice that there is a lot of data. So please
+disable syslogd/syslog-ng before you do this, or you must make
+sure that kernel output is not logged.
When you're done, disable block dump using:
# echo 0 > /proc/sys/vm/block_dump
Alternative:
laptop-mode-tools provides a tool named lm-profiler (laptop mode profiler)
which handles block_dump on its own.
+
+See: $KERNEL-SOURCE/Documentation/laptop-mode.txt
+
+Also take a look at event-viewer(8) which is part of grml-debugtools.
--
Install initrd via initramfs-tools for currently running kernel:
# /usr/share/mplayer/scripts/win32codecs.sh
+or
+
+# /usr/share/mplayer/scripts/binary_codecs.sh install
+
+(depending on the mplayer version you have).
+
To play encrypted DVDs and if you are living in a country where using
libdvdcss code is not illegal can install Debian package libdvdread3
and use the script /usr/share/doc/libdvdread3/install-css.sh.
Start dnsmasq finally:
# Restart dnsmasq
--
-Find out which process(es) cause the disk to spin up:
-
-# echo 1 > /proc/sys/vm/block_dump
-
-The command sets a sysctl to cause the kernel to log all disk
-writes. Please notice that there is a lot of data.
-
-See: $KERNEL-SOURCE/Documentation/laptop-mode.txt
-
-Also take a look at event-viewer(8).
---
Display stats about memory allocations performed by a program:
Usage example for 'ls':
# gzip -d bootcd-i386-5.3.iso.gz
# kvm -cdrom bootcd-i386-5.3.iso
--
+EEPROM data decoding for SDRAM DIMM modules:
+
+# modprobe eeprom
+# /usr/share/doc/lm-sensors/examples/eeprom/decode-dimms.pl
+--
+Set up and use DVB:
+
+Make sure your device is supported by Linux and running.
+See http://www.linuxtv.org/ for more details.
+
+If the DVB device works on your system (see 'hwinfo --usb'
+when using a DVB usb device for example), then make sure you
+have the scan util from dvb-utils available:
+
+# aptitude install dvb-utils
+
+Then create a channels.conf configuration file:
+
+% scan /usr/share/doc/dvb-utils/examples/scan/... > ~/.mplayer/channels.conf
+
+You can find some example configuration files on
+your grml system in ~/.channels. Usage example:
+
+% ln -s ~/.mplayer/channels.conf-AT-graz ~/.mplayer/channels.conf
+
+Tip: w_scan (see http://free.pages.at/wirbel4vdr/w_scan/index2.html)
+might be useful if you do not know the initial configuration
+details.
+--
+Get the lastest mercurial snapshot:
+
+Make sure you have the python-dev package available:
+# apt-get update ; apt-get install python-dev
+
+Get and build the source:
+% hg clone http://selenic.com/repo/hg mercurial
+% cd mercurial
+% make local
+% export PYTHONPATH=$(pwd)
+% export PATH=$PATH:$(pwd)
+
+now you should have the newest version of mercurial whenever you execute hg.
+
+To update to the lastest development snapshot, additionally use
+the following commands:
+% hg pull -u http://hg.intevation.org/mercurial/crew
+% make local
+--
+Configure timezone
+==================
+
+Available bootoptions relevant in live-cd mode:
+-----------------------------------------------
+
+* utc: set UTC, if your system clock is set to UTC (GMT)
+* gmt: set UTC, if your system clock is set to UTC (GMT) [like bootoption utc]
+* tz=$option: set timezone to corresponding $option, usage example:
+ tz=Europe/Vienna
+
+Configuration options relevant on harddisk installation:
+--------------------------------------------------------
+
+* Use the tzconfig utility to set the local timezone:
+
+ # tzconfig
+
+ which adjusts /etc/timezone and /etc/localtime according
+ to the provided information.
+
+* /etc/default/rcS: set variable UTC according to your needs,
+ whether your system clock is set to UTC (UTC='yes') or
+ not (UTC='no')
+
+* /etc/localtime: adjust zoneinfo according to your needs:
+
+ # ln -sf /usr/share/zoneinfo/$WHATEVER_YOU_WANT /etc/localtime
+
+ The zoneinfo directory contains the time zone files that were
+ compiled by zic. The files contain information such as rules
+ about DST. They allow the kernel to convert UTC UNIX time into
+ appropriate local dates and times. Use the zdump utility to
+ print current time and date (in the specified time zone).
+
+* /etc/adjtime: This file is used e.g. by the adjtimex function,
+ which can smoothly adjust system time while the system runs
+
+* If you change the time (using 'date --set ...', ntpdate,...)
+ it is worth setting also the hardware clock to the correct time:
+
+ # hwclock --systohc [--utc]
+
+ Remember to add the --utc -option if the hardware clock is set
+ to UTC!
+
+Still problems?
+---------------
+
+Check your current settings via:
+
+ cat /etc/timezone
+ zdump /etc/localtime
+ echo $TZ
+ hwclock --show
+ grep hwclock /etc/runlevel.conf
+ grep '^UTC' /etc/default/rc
+
+Further information:
+--------------------
+
+ hwclock(8) tzselect(1) tzconfig(8)
+ http://www.debian.org/doc/manuals/system-administrator/ch-sysadmin-time.html
+ http://wiki.debian.org/TimeZoneChanges
+--
projects / grml-tips.git / blobdiff