CPU data
Check the CPU, check the model name and the number of cpus (several cores)

cat /proc/cpuinfo |grep 'model name'|tail -n1
cat /proc/cpuinfo |grep 'model name'|wc -l

Operation screen

# cat /proc/cpuinfo |grep 'model name'|tail -n1
model name	: Intel(R) Xeon(R) Silver 4214 CPU @ 2.20GHz
# cat /proc/cpuinfo |grep 'model name'|wc -l
24

If there is an lscpu command, it is desirable to update the clear information

lscpu
Architecture:                    x86_64
CPU op-mode(s):                  32-bit, 64-bit
Byte Order:                      Little Endian
Address sizes:                   46 bits physical, 48 bits virtual
CPU(s):                          24
On-line CPU(s) list:             0-23
Thread(s) per core:              2
Core(s) per socket:              12
Socket(s):                       1
NUMA node(s):                    1
Vendor ID:                       GenuineIntel
CPU family:                      6
Model:                           85
Model name:                      Intel(R) Xeon(R) Silver 4214 CPU @ 2.20GHz
Stepping:                        7
底下....略.....

Memory
check how much memory

grep MemTotal /proc/meminfo
egrep 'MemTotal|MemFree|MemAvailable' /proc/meminfo

Actual operation screen

$ egrep 'MemTotal|MemFree|MemAvailable' /proc/meminfo
MemTotal:       82024272 kB
MemFree:        51008940 kB
MemAvailable:   74909208 kB

If there is a free command, the following command can be used to make it clearer

$free -h
               total        used        free      shared  buff/cache   available
Mem:            78Gi       4.1Gi        48Gi       1.8Gi        25Gi        71Gi
Swap:          8.0Gi          0B       8.0Gi

hard disk space
The disk can be detected with the df command

df -h
Filesystem                         Size  Used Avail Use% Mounted on
tmpfs                              7.9G  6.6M  7.9G   1% /run
/dev/mapper/ubuntu--vg-ubuntu--lv   98G   35G   58G  38% /
tmpfs                               40G     0   40G   0% /dev/shm
tmpfs                              5.0M     0  5.0M   0% /run/lock
/dev/sda2                          2.0G  248M  1.6G  14% /boot
/dev/sda1                          1.1G  5.3M  1.1G   1% /boot/efi
tmpfs                              7.9G  4.0K  7.9G   1% /run/user/0
tmpfs                              7.9G  4.0K  7.9G   1% /run/user/1000

If you want a beautiful picture, we can also use neofetch to quickly check, usually need to be installed separately.

E.g:
Manjaro Linux will look like this