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LPIC-StudyGuide > 103.5 Create Monitor Kill Processes > Flashcards

103.5 Create Monitor Kill Processes Flashcards

1
Q

create monitor kill

process identification unique number on the system that can be used to refer to a running process

A

PID

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2
Q

Streams - Pipes - Redirects

displays process that were started and are running as the current or indicated user

A

ps

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3
Q

Streams - Pipes - Redirects

show a tree view (hierarchical ASCII or ncurses display) of running processes

A

pstree

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4
Q

Streams - Pipes - Redirects

provides info about system memory
total
in use
shared
buffers
cached

A

free

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5
Q

Streams - Pipes - Redirects

displays amount of time the system has been running since last boot/reboot and also provides info on how many users are currently on the system - and average load on the system in minutes values
1
5
15

A

uptime

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6
Q

Streams - Pipes - Redirects

sent to a process that it then reacts to depending on type of signal

A

signals

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7
Q

Streams - Pipes - Redirects

sends a nice kill command to the PID and allows the process to cleanly stop
terminate
release memory
close open files

A

kill

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8
Q

Streams - Pipes - Redirects

kills all instances of the named process

A

killall

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9
Q

Streams - Pipes - Redirects

process kills, kills processes based on
name
ID
user
session
terminal

A

pkill

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10
Q

Streams - Pipes - Redirects

allows for testing debugging of the pkill comand and displays process ID that will be affected (takes ALL pkill options to be able to determine what PID will be affected)

A

pgrep

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11
Q

Streams - Pipes - Redirects

will display status of jobs that have been paused

A

jobs

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12
Q

Streams - Pipes - Redirects

sends indicated job to the background and commonly used after the above jobs command to place a paused job into the background so it becomes active again

A

bg

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13
Q

Streams - Pipes - Redirects

bring indicated job to the foreground for bringing previous bg process to the foreground for use

A

fg

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14
Q

Streams - Pipes - Redirects

places a program into the background when run after a command

A

&

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15
Q

Streams - Pipes - Redirects

will run and place the vim editor in the background

A

vim &

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16
Q

Streams - Pipes - Redirects

scheduling and priorities are what Linux uses to run multiple apps/services/process on a single machine in multi-tasking manner

A

priority

17
Q

Streams - Pipes - Redirects

default process

A

0

18
Q

Streams - Pipes - Redirects

any user can start processes with priorities from

A

0 - 19

19
Q

Streams - Pipes - Redirects

only root users can start processes with priorities from

A

0 to -20

20
Q

Streams - Pipes - Redirects

allows you to start an app or process at the command line/terminal and then stop/exit/logout of the terminal or session while leaving the app or process running

A

nohup

21
Q

Streams - Pipes - Redirects

potentially long running file command would stop if we log off machine close the terminal but nohup allows it to continue

A

ie

nohup find / -name “somefile” > output.txt

22
Q

Streams - Pipes - Redirects

text-based session manager that can run multiple shell sessions independent of each other within a single window

A

screen

23
Q

Streams - Pipes - Redirects

screen

can be used for local or remote connectivity as you would multiple terminals

A

screen sessions

24
Q

Streams - Pipes - Redirects

screen

supports copy/paste between sessions

A

screen

25
Q

Streams - Pipes - Redirects

screen

scrolling bugger per session

A

screen

26
Q

Streams - Pipes - Redirects

screen

supports output logging

A

if configured

27
Q

Streams - Pipes - Redirects

screen

ability to detach - abandon a window and allows programs launched within to keep running

A

screen

28
Q

Streams - Pipes - Redirects

screen options

open new session

A

ctl+a then c

ctl+ac

29
Q

Streams - Pipes - Redirects

screen options

move back to previous session

A

ctl+a then p

ctl+ap

30
Q

Streams - Pipes - Redirects

screen options

move to next session

A

ctl+a then n

ctl +an

31
Q

Streams - Pipes - Redirects

screen options

display list of available sessions (numeric id)

A

ctl+a then display list of available sessions (numeric id)

after numbers are shown pressing corresponding number and enter will switch to that session

32
Q

Streams - Pipes - Redirects

screen options

detach from screen (process still running)

A

ctl+a then d

ctl+ad

32
Q

Streams - Pipes - Redirects

screen options

lock the screen

A

ctl+a then x

ctl +ax

prompts twice for p/w to unlock

33
Q

Streams - Pipes - Redirects

screen options

show screens

A

screen -ls

34
Q

Streams - Pipes - Redirects

screen options

reattach to the screen

A

screen -r

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