The moreutils package is a natural extension of the GNU Core Utilities. It provides additional functionality for command line operations.| Putorius
The Linux pee command allows you to split output from a command into multiple streams. Like the tee command for pipes!| Putorius
The sponge command is used to read all data from standard in then write it to a file. It reads all data in, before opening the output file.| Putorius