Why can’t tr read from /dev/urandom on OSX?
A colleague suggested creating a random key via the following command:
Unix & Linux
get first X characters from the cat command?
I have a text file I’m outputting to a variable in my shell script. I only need the first 50 characters however.
Fedora 23 — Can I safely delete files in /var/cache/PackageKit/metadata/updates/packages?
I noticed that the folder referenced in the subject line is taking up 1.5 GB. Can I run the below to clear it without causing permanent damage to my system?
How do I switch from an unknown shell to bash?
I was surprised that I didn’t find this question already on the site. So, today $ came up after I logged in as a new user. This was unexpected because my main user’s prompt starts with [email protected]:~$.
convert images to pdf: How to make PDF Pages same size
I did something like
How to delete the rest of each line after a certain pattern or a string in a file?
Suppose I have a list of URLs in a text file:
Increase %e precision with /usr/bin/time shell command
When I run the time command in shell time ./myapp I get an output like the following:
How do I create a blank PDF from the command line?
I recently needed a single blank PDF page (8.5″ x 11″ size) and realized that I didn’t know how to make one from the command line.
understanding the output of “apt-cache policy”
I ran apt-cache policy sudo before and after installing sudo: