The manual page and help for the paste Linux command. The paste command concatenates lines of files.

The manual page and help for the ncdu Linux command. ncdu (NCurses Disk Usage) is an interactive (NCurses-based) disk usage checking program running in a terminal. When the program is started, it first detects, calculates, and then lists the subdirectories and files of the given directory and shows their sizes. In the case of libraries, it naturally shows the recursively summed sizes. A very effective interactive alternative to the well-known du command. To use the program on Debian / Ubuntu systems, the ncdu package must be installed.

The manual page and help for the rngtest Linux command. The rngtest command verifies data randomness using FIPS 140-2 tests. To run the command on Debian and Ubuntu systems, the rng-tools package must be installed.

The manual page and help for the sar Linux command. Using the sar command, the performance of the various Linux subsystems (CPU, memory, I/O) can be monitored in real time. To use the sar command on Debian and Ubuntu systems, the sysstat package must be installed.

The manual page and help for the mpstat Linux command. The mpstat command outputs statistical information about processors. The command can be used on Debian/Ubuntu systems by installing the sysstat package.

The manual page and help for the realpath Linux command. The realpath command lists the absolute access to the specified file or directory.

The manual page and help for the vnstat Linux command. vnStat is a command-line network traffic monitoring tool. It keeps a log of the hourly, daily and monthly network traffic of the selected interface(s). Data traffic is not measured by capturing packets, but rather they are read from the proc(5) or sys file system, depending on availability, so vnStat can be used on most systems without root privileges.
The program consists of two parts. The vnstat command provides an interface for querying traffic data stored in network device-specific databases, while the vnstatd daemon is responsible for collecting and storing the data. Although the daemon process runs as a continuous service, it idles most of the time between data updates.

The manual page and help for the pwdx Linux command. The pwdx command lists the current working directory of the specified process.

Manual page and help for the quotastats Linux command. The quotastats command queries the quota statistics and prints them to the output.

The manual page and help for the watch Linux command.