Process Management

Programs vs Process Revised

• Programs The applications that we can run, like the Chrome web browser

• Processes Programs that are running

• Program -> Process -> Resources

• Process ID

• Background processes

Windows: Process Creation and Termination

• Session Manager Subsystem

• smss.exe

• winlogon.exe

• Client/Server Runtime Subsystem

• csrss.exe

• init

• Environment

• notepad.exe

• taskkill

• PID

• taskkill /pid 5856

Linux: Process Creation and Termination

• less /etx/some_file | grep Hello
• When you startup your computer, the kernel creates a process called init, which has a PID of .

Windows: Reading Process Information

• Chrome -> Program -> Processes
• taskmgr.exe
• CTRL+SHIFT+ESC
• GUI
• Get-Process

Linux: Reading Process Information

• ps -x
• R:running
• T:stopped
• S:interruptibel sleep
• ps -ef
• ps -ef | grep Chrome
• ls -l /process
• cat /proc/1805

Windows: Signals

• Signal A way to tell a process that something’s just happened

• SIGINT

Linux: Signals

• SIGINT
• sudo parted

Windows: Managing Processes

• Process Explorer A utility Microsoft created to let IT Support Specialists, system administrators and other users look at running processes
• GUI
• Multilingual User Interface
• procexp.exe

Linux: Managing Processes

• SIGTERM
• kill 10235
• SIGKILL
• -KILL
• kill -KILL 10392
• terminal stop
• SIGTSTP
• -TSTP
• ps -x
• kill -TSTP 10754
• SIGCOUNT
• kill -COUNT 10829
• SIGTERM
• SIGKILL
• SIGTSTP

Mobile App Management

• GUI
• FOREGROUND

Windows: Resource Monitoring

• Resource Monitoring tool
• GUI
• Get-Process
• Get-Process | Sort CPU -descending | Select -first -Property ID.ProcessName.CPU

Linux: Resource Monitoring

• top
• q
• uptime
• Isof