Monitor and Manage Processes

Question 1

What command gives statistics on file system (disk space)?

Answer 1

df use -h option for human readable format -T option = type of file system.

Question 2

What command is used to see disk usage of each file?

Answer 2

du option -k can be used to view in kilobytes and -h for human readable.

Question 3

What command is used to see load averages and view how long a system has been up for?

Answer 3

uptime

load averages are in 5min 10min and 15min increments.

Question 4

What command gives a variety of info for processes that is commonly used by sysadmins?

Answer 4

top/htop

Question 5

What commands gives memory info?

Answer 5

free option -m shows in megabytes.

Question 6

What command lists open file system?

Answer 6

lsof

Question 7

What command can you view network traffic (like wireshark)?

Answer 7

tcpdump -i enp0s3

Question 8

What command can give you network statistics?

Answer 8

netstat -rnv option -au = all udp traffic -at = all tcp traffic

Question 9

What command gives you the status of all processes?

Answer 9

ps -ef

Question 10

What command can force stop a process?

Answer 10

kill option -9 is a harsh kill and kills all associates processes.

Question 11

What are the types of info that is given with the command top/htop?

Answer 11

PID: Process ID
User: Owner of Process
PR: Process Priority
NI: Nice Value of Process
VIRT: Amount of Virtual Memory Used
RES: Amount of Resident Memory Used
SHR: Amount of Shared Memory Used
S: Status of Process
S: Sleeping
R: Running
I: Inactive
%CPU: CPU Usage
%MEM: Memory Usage
Time+: CPU Time Used by Task
Command: Command Name/Line + options