sed is a stream editor command available on Unix-compatible systems. sed is quite a powerful tool, but the learning curve is also high comparing to other similar tools such as grep or awk. Almost every time I want to do something with sed, I need to look it up and search for some examples. So, I decided to compile a concise tutorial for sed that covers the most common use-cases....
awk is a domain-specific language and command for text processing available on Unix-compatible systems. gawk is the GNU AWK and all Linux distributions come with it. This is a brief tutorial for awk covering the most common use-cases. awk reads input line by line from a file, pipe, or stdin and executes a program on each line. An input line has a number of fields separated by white space or by regular expression FS....
TL;DR A container is a package format and a content addressable bundle of content addressable layers! namespaces and cgroups are two key features of Linux kernel enabling containerization. Containers running on a host share a single Linux kernel! (a singler scheduler, a single memory manager, and so on) The Linux kernel has so many known and unknown bugs! Sandboxes are a way of getting an extra layer of isolation for containers....