I have a bash shell variable called u="this is a test". How can I extract the “test” string and store into a shell variable?
ow do I use a heredoc redirection feature (here documents) to write data to a file in my bash shell scripts?
My Linux distro comes with Firefox ESR. I read Firefox 57 is over twice as fast as Firefox from 6 months ago, built on a completely overhauled core engine with brand new technology. How do I installed newly released Firefox version 57 “Quantum” on a Linux operating system?
am a new Linux command line user. How do I find file permissions in octal format such as 0644 from the bash command line running on a Linux or Unix operating systems? How can I get the octal permissions for a file?
downloaded a Ubuntu .iso file named artful-desktop-amd64.iso on a Debian Linux system. How do I write or burn a Ubuntu .iso to a USB device for installation purpose from Linux terminal?
am a new Linux server user. I cannot figure out how to find out the source code of a bash function named foo() which is defined. How to locate the file where a bash function is defined and how to view the source code of foo() from shell prompt itself?
am a new Linux system user. How do I delete file containing a character ‘a’ or ‘z’ in their filename or digit such as ‘4’ or ‘2’ in their filename on Linux or Unix bash shell prompt?