Neural failure… Abort, Retry, Fail?
It’s been a while since I last did this but you never know when you might need it. When you see a “dd” command, you better make sure you know what you are doing. In other words, don’t type this just as you see it!
Identify where CD/DVD is mounted:
mount
Unmount the CD/DVD:
umount /dev/sr0
Copy data from CD/DVD to ISO file:
dd if/dev/sr0 of=~/image.iso
Or use dcfldd if you prefer:
dcfldd if/dev/sr0 of=~/image.iso
UPDATE: Looks like a one-liner was added to apt-get a few years back that simplifies the older and more manual way which I documented below. This also affects more than just the old kernels so use with caution:
apt-get autoremove --purge
After a number of kernel upgrades the file system gets filled up. Here is one way to clean up.
As root –
Display a list of installed kernel packages:
dpkg -l | grep linux-image
Display the running kernel (you don’t want to really remove this one do you?):
uname -a
After careful observation, remove the packages:
apt-get purge linux-image-3.2.0-23-generic, linux-image-3.2.0-24-generic
As a side, I tend to leave one additional kernel installed as a backup, unless there is a serious security/bug issue.
This is one of the oldest entries in my offline notes. I used it quite a bit years ago. Simply said, take several .pdf files and combine them into one file.
As always boys and girls – “man gs” in the terminal before you do this.*
gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile=final.pdf file1.pdf file2.pdf file3.pdf
*As a side note: some of the options in the above command are not in the man page on my Debian 9 system. Man says you may need to install ghostscript-doc and view the pages in /usr/share/doc/ghostscript/
**Looks like “-o” is a shorthand to replace the “-dBATCH -dNOPAUSE” combination. https://www.ghostscript.com/doc/9.20/Use.htm