Difference between revisions of "Miscellaneous"
Line 11: | Line 11: | ||
# /bin/chmod 06555 /usr/bin/lpr /usr/bin/lprm | # /bin/chmod 06555 /usr/bin/lpr /usr/bin/lprm | ||
# /sbin/chkconfig lpd on | # /sbin/chkconfig lpd on | ||
+ | |||
+ | == Find open files on mount == | ||
+ | sudo lsof +f -- /var/media | ||
== Hardware == | == Hardware == |
Revision as of 08:17, 12 January 2021
Contents
- 1 Ubuntu Starter Guide
- 2 Adding startup service
- 3 Enabling Printing
- 4 Find open files on mount
- 5 Hardware
- 6 Convert m4a to mp3
- 7 Changing default ALSA soundcard
- 8 List hardware details
- 9 Add swap space
- 10 Change userid/groupid for an existing user/group
- 11 Music Naming Strategy
- 12 Power management on VGA / DVI monitors
- 13 awstats: Can't locate object method "isp_by_name"
- 14 awstats: Hostname not resolved
- 15 awstats: Couldn't open server log file "/var/log/apache2/access.log" : Permission denied
- 16 ssh: Slow login
- 17 GRUB 2: error: no such disk
- 18 Disable user list at login
- 19 Fixing plymouth (pretty boot screen) with nvidia proprietary drivers
- 20 Measuring LAN performance
Ubuntu Starter Guide
Adding startup service
To ensure a service which exists in /etc/init.d is run on startup, simply run:
sudo update-rc.d <service> defaults
Enabling Printing
- /bin/chmod 06555 /usr/bin/lpr /usr/bin/lprm
- /sbin/chkconfig lpd on
Find open files on mount
sudo lsof +f -- /var/media
Hardware
ATI Radeon on a custom kernel
Stock ubuntu kernels include the ATI kernel source, but if you've built the kernel yourself and you're getting atiddxDriScreenInit failed errors in Xorg.0.log, you'll need to install this manually with
sudo apt-get install fglrx-kernel-source
Reboot once the install completes, and fglrx should be good to go.
Logitech MX-1000
Feisty
Add this section to your /etc/X11/xorg.conf:
Section "InputDevice" Identifier "Logitech MX-1000" Driver "mouse" Protocol "evdev" Option "CorePointer" Option "Name" "PS2++ Logitech MX Mouse" Option "Device" "/dev/input/event4" Option "Buttons" "20" Option "ZAxisMapping" "4 5" EndSection
where "Name" and "Device" are read from the relevant "Name" and "Handler" for your device in /proc/bus/input/devices. Then follow the remaining instructions in http://www.ubuntuforums.org/showthread.php?t=65471
Although this document describes the steps for a USB mouse, this also works when connected to the PS2 port. Note, however, that a Logitech MX-1000 forward and back keys are 8 and 9, and xvkbd is located in /usr/bin rather than /usr/X11R6/bin. In addition, as stated in the text, part 1.4 is unnecessary.
Gutsy
Add this section to your /etc/X11/xorg.conf:
Section "InputDevice" Identifier "Logitech MX-1000" Driver "evdev" Option "CorePointer" Option "Name" "PS2++ Logitech MX Mouse" Option "Device" "/dev/input/event4" Option "Buttons" "20" Option "ZAxisMapping" "4 5" EndSection
where "Name" and "Device" are read from the relevant "Name" and "Handler" for your device in /proc/bus/input/devices
Also, I needed to append "SendCoreEvents" to the Logitech line in the layout section
Hardy
Add this section to your /etc/X11/xorg.conf:
Section "InputDevice" Identifier "Logitech MX1000" Driver "evdev" Option "Name" "PS2++ Logitech MX Mouse" Option "HWHEELRelativeAxisButtons" "7 6" EndSection
where "Name" is read from the "Name" for your device in /proc/bus/input/devices
Gigabyte P55
To add temperature/fan sensor support, add it87 to /etc/modules and reboot. Then make the following changes to /etc/sensors3.conf:
- Add a new section for chip it8720-* with the contents:
chip "it8720-*" label in0 "VCore CPU" label in1 "VCore RAM" label in2 "+3.3V" label in3 "+5V" label in4 "???" label in5 "+12V" label in6 "Null" label in7 "Standby" label in8 "Battery" ignore in4 ignore in6 compute in3 ((6.8/10)+1)*@ , @/((6.8/10)+1) compute in5 ((30/10) +1)*@ , @/((30/10) +1) compute in7 ((6.8/10)+1)*@ , @/((6.8/10)+1) set in0_min 0.5 set in0_max 1.9 set in1_min 1.3 set in1_max 2.6 set in2_min 3.3 * 0.95 set in2_max 3.3 * 1.1 set in3_min 5.0 * 0.95 set in3_max 5.0 * 1.1 set in5_min 12 * 0.95 set in5_max 12 * 1.1 set in7_min 3.6 * 0.95 set in7_max 3.6 * 1.1 #the chip does not support in8 min/max # Temperature label temp1 "Motherboard Temp" set temp1_max 60 set temp1_min 10 label temp2 "Case Temp" set temp2_max 40 set temp2_min 10 label temp3 "CPU Temp" #set temp3_type 2 # thermal diode set temp3_max 60 set temp3_min 10 # Fans label fan1 "CPU Fan" ignore fan2 label fan3 "Case Fan (Top Front)" label fan4 "Case Fan (Top Rear)"
Convert m4a to mp3
- Ensure libfaad2-0 and ffmpeg (from medibuntu) are installed, and run:
ffmpeg -ab <bitrate in kb/s> -i <inputfile> <outputfile>
Note: the error output buffer too small can be ignored.
Changing default ALSA soundcard
asoundconf list asoundconf set-default-card <cardname>
List hardware details
sudo lshw -businfo
Add swap space
- Create swap partition using fdisk
- Create swap filesystem
sudo mkswap <device>
- Activate swap
sudo swapon <device>
- Modify /etc/fstab to allow swap to be activated at boot time
Change userid/groupid for an existing user/group
- Change groupid in /etc/group
- Run sudo grpconv to update /etc/gshadow
- Change userid in /etc/passwd (and also the primary groupid for any changed groupids)
- Run sudo pwconv to update /etc/shadow
Music Naming Strategy
Type | Title | TrackNum | Artist | Sort Artist | Album Artist | Sort Album Artist | Album | Sort Album | Disc | Genre | Compilation |
---|---|---|---|---|---|---|---|---|---|---|---|
TIT2 | TRCK | TPE1 | TSOP | TPE2 | TSO2 | TALB | TSOA | TPOS | TCON | TCMP | |
Albums | Title | TrackNum | Artist | BLANK | Directory1 | BLANK / Number word | Album | Directory2 [Disc n] | Disc | Genre | BLANK |
Compilations | Title | TrackNum | Artist | BLANK | Various Artists | ZZZD | Album | Directory2 [Disc n] | Disc | Genre | 1 |
Singles | Title | BLANK | Artist | BLANK | Various Artists | ZZZH | Singles | BLANK | BLANK | Genre | 1 |
Soundtracks | Title | TrackNum | Artist | BLANK | Various Artists | ZZZL | Album | Directory2 [Disc n] | Disc | Soundtrack (24) | 1 |
Spoken | Title | TrackNum | Artist | BLANK | Directory1 | ZZZP | Album | Directory2 [Disc n] | Disc | Genre | BLANK |
Fun | Title | BLANK | Artist | BLANK | BLANK | ZZZT | Fun | BLANK | BLANK | Comedy (57) | 1 |
- Albums: eyeD3 --to-v2.3 --set-text-frame="TSOP:" --set-text-frame="TPE2:$artist" --set-text-frame="TSO2:" --set-text-frame="TSOA:$album" --set-text-frame="TCMP:" $file
- Compilations: eyeD3 --to-v2.3 --set-text-frame="TSOP:" --set-text-frame="TPE2:Various Artists" --set-text-frame="TSO2:ZZZD" --set-text-frame="TSOA:$album" --set-text-frame="TCMP:1" $file
- Singles: eyeD3 --to-v2.3 --set-text-frame="TRCK:" --set-text-frame="TSOP:" --set-text-frame="TPE2:Various Artists" --set-text-frame="TSO2:ZZZH" --set-text-frame="TALB:Singles" --set-text-frame="TSOA:" --set-text-frame="TPOS:" --set-text-frame="TCMP:1" $file
- Soundtracks: eyeD3 --to-v2.3 --set-text-frame="TSOP:" --set-text-frame="TPE2:Various Artists" --set-text-frame="TSO2:ZZZL" --set-text-frame="TSOA:$album" --set-text-frame="TCMP:1" $file
File Ownership
- chown root:admin $file
- chmod 664 $file
- chown root:admin $dir
- chmod 775 $dir
Power management on VGA / DVI monitors
There is a standard called DPMS where a couple of pins are used for the computer to signal the monitor to go into a low-power mode. This is separate from any power management settings on the computer itself, and from the kde/gnome screensaver.
The nVidia driver fully supports DPMS, and the nvidia configuration tool typically sets it up for you. If you want to turn it off, comment out the line in the monitor section of xorg.conf.
# Option "DPMS" "true"
awstats: Can't locate object method "isp_by_name"
(Sometimes Can't locate auto/Geo/IP/isp_by_addr.al). This often manifests as a partially loaded awstats webpage, ending shortly after beginning of the "Hosts" table
- Change /usr/share/awstats/plugins/geoip_isp_maxmind.pm from isp_by_xxx to org_by_xxx
awstats: Hostname not resolved
To ensure that unresolved hosts (eg. intranet or corporate proxy hosts) are represented properly in awstats, add them to /var/lib/awstats/dnscache.txt
awstats: Couldn't open server log file "/var/log/apache2/access.log" : Permission denied
Change /etc/cron.d/awstats to run command as root, rather than www-data
ssh: Slow login
This may be due to the MOTD (Message Of The Day) scripts trying to get volume information for filesystem mounts that are no longer available (eg. Samba mounts). To fix this, update the MOTD scripts to make them ignore remote filesystems by editing /usr/share/pyshared/landscape/lib/disk.py and adding these lines after except ValueError: continue:
# prevent slow reading of unavailable remote filesystems if filesystem == "cifs": continue
GRUB 2: error: no such disk
This may be caused by the line "insmod lvm", if you don't have the floppy drive disabled in the BIOS, but no floppy drive is present.
Disable user list at login
sudo -u gdm gconftool-2 --set --type boolean /apps/gdm/simple-greeter/disable_user_list true
Fixing plymouth (pretty boot screen) with nvidia proprietary drivers
See http://www.sucka.net/2010/03/nvidia-drivers-ubuntu-10-04-lucid-lynx/
Measuring LAN performance
Host 1 (linux):
iperf -s -p 8123
Host 2 (mac):
~/bin/iperf -c host1 -p 8123