Procps

• free(1) Display amount of free and used memory in the system
• kill(1) send a signal to a process
• pgrep(1) look up, signal, or wait for processes based on name and other attributes
• pidwait(1) look up, signal, or wait for processes based on name and other attributes
• pkill(1) look up, signal, or wait for processes based on name and other attributes
• pmap(1) report memory map of a process
• procps_misc(3) API for miscellaneous information in the /proc filesystem
• procps_pids(3) API to access process information in the /proc filesystem
• procps(3) API to access system level information in the /proc filesystem
• ps(1) report a snapshot of the current processes.
• pwdx(1) report current working directory of a process
• skill(1) send a signal or report process status
• slabtop(1) display kernel slab cache information in real time
• snice(1) send a signal or report process status
• sysctl.conf(5) sysctl preload/configuration file
• sysctl(8) configure kernel parameters at runtime
• tload(1) graphic representation of system load average
• top(1) display Linux processes
• uptime(1) Tell how long the system has been running.
• vmstat(8) Report virtual memory statistics
• w(1) Show who is logged on and what they are doing.
• watch(1) execute a program periodically, showing output fullscreen