Neal's Computing Notes – Page 2

PIXMA 100 setup

this is a cheap and apparently old printer. Important points:

It doesn’t connect to my WiFi — it needs a WPS button on the router
It doesn’t work with USB3 ports, needs to be connected to an older port
It needs to be rebooted prior it each printing session
The paper tray needs to be unfolded from the back, and the paper catcher needs to be unfolded from the front.

check rotation lock, it is the same switch for mute, which can stop game sounds

pressing mapping&preset together, then the home light will flash. then reboot. you can test whether the driver is working from settings

debian

lspci, look for wireless network
the drivers are proprietary, non-free so google for the driver and install. in this case it was firmware-iwlwifi.
wireless-tools
wicd (networkmanager also may have been helpful at some time, but i think its best to have only 1 of them installed.)
reboot and check the hardware wireless switch is on. (removed something called avahi-auto ipd because i wasnt getting connection and i thought it was interfering, turned out to be the wireless switch, doesn’t seem to have messed anything up either way and i don’t know what it does.)

ddrescue --force /dev/zero /dev/sdb log.txt

fill out form with xournal and export pdf. (oowriter didn’t read xournal’s output even with the libreoffice pdf import extension, but the xournal’d pdf did print, gimp was able to read it, and it was emailable)
edit a photo of signature in gimp (nice video http://youtu.be/efAOsvfi4sU)
1. layer/transparency/add alpha channel. like writing on an overhead slide, the checkerboard represents the background through the slide
2. use fuzzy select tool from toolbox to select the background from the photo
3. delete the background, should see checkerboard. delete within loops for O, Q, etc.
4. from brushes, select the largest black brush and set mode to overlay. brush over the signature to darken it to a uniform black, otherwise it looks grayish like a photo when printed.
5. open the pdf from gimp and select the page which needs the signature
6. use the rectangle select tool to select the area where the signature should go. note the height and/or width of the field.
7. go to the signature image and image/scale image. enter either the height or width to scale to, then`edit/copy visible.
8. go back to the pdf and right click on the rectangle and paste.
9. export the page to pdf
use pdfshuffler to replace the unsigned page with the signed page in the PDF in order. may need pdfshuffler orig sign orig (wasn’t able to move later pages to earlier ones, but was able to delete pages).

debian

add yourself to the lpadmin group using
sudo usermod -a -G lpadmin tom /etc/init.d/cups restart
printer should see router so connect them and get the confirmation printout which has the IP
go to http://localhost:631/
add printer, give 1 word for printer name. URL will be socket://IP from printout. cups already has the driver, add Epson Workforce 630
lp -d printername whatever.pdf
debian wiki on printing
cups printing documentation

To add LaTeX formulas to xfig

add a text element, and enter LaTeX including $$
edit the text element properties, and mark it special
export as PDF/Latex
in the LaTeX file, include the figure using \resizebox{\textwidth}{!}{ \input{thefilename.pdf_t} }

bash

$ catdvi -e 1 -U file.dvi | sed -re “s/\[U\+2022\]/*/g” | sed -re “s/([^^[:space:]])\s+/\1 /g” > file.txt

from

got a new phone, installed the voice app but google voicemail not working. found out the thing to do is:

write down the carrier voicemail number

write down the carrier forwarding numbers when busy, on a call, or unavailable

update all of these to the google voice number