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?
defined mount bash shell alias as follows on my Linux system: alias mount='mount | column -t'
However, I need to bash bypass alias for mounting the file system and another usage. How can I disable or bypass my bash shell aliases temporarily on a Linux, *BSD, macOS or Unix-like system?
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?
I run over 10+ LXD VMs powered by CentOS Linux 7 and Debian/Ubuntu Linux. How do I upgrade all VMs automatically or on demand using Ansible tool?
alware is becoming more and more common for macOS. I wanted to make sure file I downloaded files such as an ISO image or firmware are safe before install on my system. How do I verify md5 or sha1 or sha256 checksums for my Apple MacOS X when I download files from the Internet?