I am a new Linux sysadmin. What is the purpose of rm -rf command on a Linux? What does rm -rf command do on a Unix-like operating system?
am a new Unix system user. How can I view system users in Unix operating system using the command line option?
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?
ow do I monitor disk I/O latency in real time on Linux, FreeBSD, OpenBSD, and MacOS operating system?
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?
I got a Raspberry PI 3 from my friend. I am a long term macOS user. How do I write Raspbian image file to SD card using macOS?
recently ran a command ‘sed -i 's/CONFIG_1/CONFIG_OPT_2/g' /etc/nginx/sites-enabled/*.conf
‘ on a Debian Linux server. However, the sed command destroyed the link and created a regular file in place of the link file. How can I prevent my ‘sed -i’ command from destroying symlinks on Linux or Unix-like system?