Hardware

Question 1

How do you view CPU info?

Answer 1

cat /proc/cpuinfo

Question 2

What is the command to see RAM utilisation?

Answer 2

free

-h human readable

Question 3

What is the command to get info about the motherboard, BIOS, etc.

Answer 3

dmidecode

*must run with root priveleges

Question 4

What is the command to view block devices (i.e hard disks) attached to the system?

Answer 4

lslbk

Question 5

What is the command to get free space on the system?

Answer 5

df

-h output human readable format

Question 6

What is the naming convention for hard drives?

Answer 6

/dev/{xxx} | hard drive name
/dev/{xxxn} | hard drive partition
i.e /dev/sda
i.e /dev/sda1 *first partition
i.e /dev/sdb1 *second hard drive, first partition

Question 7

What is the command to interactively show statistics on running processes, cpu and ram usage?

Answer 7

top

Question 8

What is the command to list statistics on running processes, cpu and ram usage?

Answer 8

ps

• u specify username -e show all
• H process hierachy -x show command being run

Question 9

How do you kill a process using process ID?

Answer 9

kill >PID<
kill -15 >PID<
kill -SIGTERM >PID

Question 10

How do you kill a process using its name?

Answer 10

pkill

Question 11

How do you search for the ID of a process?

Answer 11

pgrep

Question 12

How do you kill a non-responding process?

Answer 12

kill -9

kill -SIGKILL

Question 13

How do you view the kernel ring buffer?

Answer 13

dmesg

• w real time -H colour formatting
• not stored on disk as updates constantly