terminal

Type the following command from your shell prompt:


df -h

df -h

Output:


Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1       139G   87G   45G  66% /
udev            3.9G  4.0K  3.9G   1% /dev
tmpfs           798M  268K  798M   1% /run
none            5.0M     0  5.0M   0% /run/lock
none            3.9G     0  3.9G   0% /run/shm

Filesystem Size Used Avail Use% Mounted on

/dev/sda1 139G 87G 45G 66% /

udev 3.9G 4.0K 3.9G 1% /dev

tmpfs 798M 268K 798M 1% /run

none 5.0M 0 5.0M 0% /run/lock

none 3.9G 0 3.9G 0% /run/shm

The device mounted on / is the root folder of your file system.

If you want to see the file system types as well:


df -hT

df -hT

Output:


Filesystem     Type      Size  Used Avail Use% Mounted on
/dev/sda1      ext4      139G   87G   45G  66% /
udev           devtmpfs  3.9G  4.0K  3.9G   1% /dev
tmpfs          tmpfs     798M  268K  798M   1% /run
none           tmpfs     5.0M     0  5.0M   0% /run/lock
none           tmpfs     3.9G     0  3.9G   0% /run/shm

Filesystem Type Size Used Avail Use% Mounted on

/dev/sda1 ext4 139G 87G 45G 66% /

udev devtmpfs 3.9G 4.0K 3.9G 1% /dev

tmpfs tmpfs 798M 268K 798M 1% /run

none tmpfs 5.0M 0 5.0M 0% /run/lock

none tmpfs 3.9G 0 3.9G 0% /run/shm

Check CPU Usage

Type “top” to see a multitude of information, constantly updated:

top

top

Output:


top - 02:11:29 up 71 days, 19:36,  1 user,  load average: 0.38, 0.34, 0.39
Tasks: 101 total,   1 running, 100 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.0%us,  0.1%sy,  0.0%ni, 99.8%id,  0.0%wa,  0.0%hi,  0.0%si,  0.1%st
Mem:   4031024k total,  3385796k used,   645228k free,   339668k buffers
Swap:  8388604k total,        0k used,  8388604k free,  2077988k cached

top - 02:11:29 up 71 days, 19:36, 1 user, load average: 0.38, 0.34, 0.39

Tasks: 101 total, 1 running, 100 sleeping, 0 stopped, 0 zombie

Cpu(s): 0.0%us, 0.1%sy, 0.0%ni, 99.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.1%st

Mem: 4031024k total, 3385796k used, 645228k free, 339668k buffers

Swap: 8388604k total, 0k used, 8388604k free, 2077988k cached

Hit the “1” key to see CPU usage by core:

1


top - 02:12:59 up 71 days, 19:38,  1 user,  load average: 0.29, 0.32, 0.39
Tasks: 101 total,   1 running, 100 sleeping,   0 stopped,   0 zombie
Cpu0  : 18.0%us,  3.0%sy,  0.0%ni, 79.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu1  :  0.3%us,  0.7%sy,  0.0%ni, 99.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu2  :  0.0%us,  0.0%sy,  0.0%ni, 99.7%id,  0.0%wa,  0.0%hi,  0.0%si,  0.3%st
Cpu3  :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:   4031024k total,  3385624k used,   645400k free,   339668k buffers
Swap:  8388604k total,        0k used,  8388604k free,  2078008k cached

top - 02:12:59 up 71 days, 19:38, 1 user, load average: 0.29, 0.32, 0.39

Tasks: 101 total, 1 running, 100 sleeping, 0 stopped, 0 zombie

Cpu0 : 18.0%us, 3.0%sy, 0.0%ni, 79.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu1 : 0.3%us, 0.7%sy, 0.0%ni, 99.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu2 : 0.0%us, 0.0%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.3%st

Cpu3 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Mem: 4031024k total, 3385624k used, 645400k free, 339668k buffers

Swap: 8388604k total, 0k used, 8388604k free, 2078008k cached

And “q” to exit out:

q

To see a static list of the top 20 CPU-hogging tasks running on your system:


# ps -eo pcpu,pid,user,args | sort -k 1 -r | head -20

# ps -eo pcpu,pid,user,args | sort -k 1 -r | head -20

Output:


%CPU   PID USER     COMMAND
 5.2  1388 107      /usr/bin/liquidsoap -d /etc/liquidsoap/bassnoize.liq
 4.0  1396 107      /usr/bin/liquidsoap -d /etc/liquidsoap/bassnoize2.liq
 2.7  1418 107      /usr/bin/liquidsoap -d /etc/liquidsoap/urban64.liq
 2.7  1407 107      /usr/bin/liquidsoap -d /etc/liquidsoap/dnb64.liq
 1.5  1378 107      /usr/bin/liquidsoap -d /etc/liquidsoap/bassnoize-other.liq
 0.4  7989 www-data /usr/sbin/apache2 -k start
 0.4  1937 icecast2 /usr/bin/icecast2 -b -c /etc/icecast2/icecast.xml
 0.3 31987 www-data /usr/sbin/apache2 -k start
 0.3 31986 www-data /usr/sbin/apache2 -k start
 0.3 31985 www-data /usr/sbin/apache2 -k start
 0.3 31961 www-data /usr/sbin/apache2 -k start
 0.3 31960 www-data /usr/sbin/apache2 -k start
 0.3 31796 www-data /usr/sbin/apache2 -k start
 0.3 31786 www-data /usr/sbin/apache2 -k start
 0.3  1055 mysql    /usr/sbin/mysqld
 0.1 17887 www-data /usr/sbin/apache2 -k start
 0.1 17886 www-data /usr/sbin/apache2 -k start
 0.0     9 root     [rcuob/0]
 0.0    99 root     [charger_manager]

%CPU PID USER COMMAND

5.2 1388 107 /usr/bin/liquidsoap -d /etc/liquidsoap/bassnoize.liq

4.0 1396 107 /usr/bin/liquidsoap -d /etc/liquidsoap/bassnoize2.liq

2.7 1418 107 /usr/bin/liquidsoap -d /etc/liquidsoap/urban64.liq

2.7 1407 107 /usr/bin/liquidsoap -d /etc/liquidsoap/dnb64.liq

1.5 1378 107 /usr/bin/liquidsoap -d /etc/liquidsoap/bassnoize-other.liq

0.4 7989 www-data /usr/sbin/apache2 -k start

0.4 1937 icecast2 /usr/bin/icecast2 -b -c /etc/icecast2/icecast.xml

0.3 31987 www-data /usr/sbin/apache2 -k start

0.3 31986 www-data /usr/sbin/apache2 -k start

0.3 31985 www-data /usr/sbin/apache2 -k start

0.3 31961 www-data /usr/sbin/apache2 -k start

0.3 31960 www-data /usr/sbin/apache2 -k start

0.3 31796 www-data /usr/sbin/apache2 -k start

0.3 31786 www-data /usr/sbin/apache2 -k start

0.3 1055 mysql /usr/sbin/mysqld

0.1 17887 www-data /usr/sbin/apache2 -k start

0.1 17886 www-data /usr/sbin/apache2 -k start

0.0 9 root [rcuob/0]

0.0 99 root [charger_manager]

Or to list all tasks with both CPU & RAM usage:


ps aux

ps aux

For information about your CPU:


lscpu

lscpu

Output:


Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                4
On-line CPU(s) list:   0-3
Thread(s) per core:    4
Core(s) per socket:    1
Socket(s):             1
NUMA node(s):          1
Vendor ID:             Xen
CPU family:            0
Model:                 0
Stepping:              0
CPU MHz:               2266.784
BogoMIPS:              4533.56
Hypervisor vendor:     Xen
Virtualization type:   para
NUMA node0 CPU(s):     0-3

Architecture: x86_64

CPU op-mode(s): 32-bit, 64-bit

Byte Order: Little Endian

CPU(s): 4

On-line CPU(s) list: 0-3

Thread(s) per core: 4

Core(s) per socket: 1

Socket(s): 1

NUMA node(s): 1

Vendor ID: Xen

CPU family: 0

Model: 0

Stepping: 0

CPU MHz: 2266.784

BogoMIPS: 4533.56

Hypervisor vendor: Xen

Virtualization type: para

NUMA node0 CPU(s): 0-3

Check Memory (RAM) Usage

Type the following into your into your shell:


# free -m

# free -m

The output will look as follows:


             total       used       free     shared    buffers     cached
Mem:          3936       3321        615          0        329       1969
-/+ buffers/cache:       1022       2913
Swap:         8191          0       8191

total used free shared buffers cached

Mem: 3936 3321 615 0 329 1969

-/+ buffers/cache: 1022 2913

Swap: 8191 0 8191

In my case, I’ve got a total of 4GB of RAM and an 8GB swap file.

How to check your hard drive space in Ubuntu 12.04 shell

Type the following command from your shell prompt:

If you want to see the file system types as well:

How to check running tasks, CPU & RAM usage in Ubuntu 12.04

How to list users, add users, edit users and more in Ubuntu 12.04

Find files containing a text string in subfolders using ‘grep’ in Ubuntu 12.04

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