Get some hardware and running process information

get-system-stats.sh

#!/bin/bash

#Number of cores
cores=$(grep -c ^processor /proc/cpuinfo) # Count all lines that starts with processor
print "This system has ${cores} cores"
nproc --all # This will also show a number
grep ^cpu\\scores /proc/cpuinfo | uniq |  awk '{print $4}' # Hyper-Threading

cat /proc/cpuinfo # Human readable information about all the processors

# The best way is using
getconf _NPROCESSORS_ONLN # In some other *NIX could be: getconf NPROCESSORS_ONLN

# Also a good way is
lscpu -p

##### Script to know number of physical and logical processors in any *NIX system #####
# https://stackoverflow.com/questions/6481005/how-to-obtain-the-number-of-cpus-cores-in-linux-from-the-command-line/23378780#23378780
#######################################################################################
# macOS:           Use `sysctl -n hw.*cpu_max`, which returns the values of 
#                  interest directly.
#                  CAVEAT: Using the "_max" key suffixes means that the *maximum*
#                          available number of CPUs is reported, whereas the
#                          current power-management mode could make *fewer* CPUs 
#                          available; dropping the "_max" suffix would report the
#                          number of *currently* available ones; see [1] below.
#
# Linux:           Parse output from `lscpu -p`, where each output line represents
#                  a distinct (logical) CPU.
#                  Note: Newer versions of `lscpu` support more flexible output
#                        formats, but we stick with the parseable legacy format 
#                        generated by `-p` to support older distros, too.
#                        `-p` reports *online* CPUs only - i.e., on hot-pluggable 
#                        systems, currently disabled (offline) CPUs are NOT
#                        reported.

# Number of LOGICAL CPUs (includes those reported by hyper-threading cores)
  # Linux: Simply count the number of (non-comment) output lines from `lscpu -p`, 
  # which tells us the number of *logical* CPUs.
logicalCpuCount=$([ $(uname) = 'Darwin' ] && 
                       sysctl -n hw.logicalcpu_max || 
                       lscpu -p | egrep -v '^#' | wc -l)

# Number of PHYSICAL CPUs (cores).
  # Linux: The 2nd column contains the core ID, with each core ID having 1 or
  #        - in the case of hyperthreading - more logical CPUs.
  #        Counting the *unique* cores across lines tells us the
  #        number of *physical* CPUs (cores).
physicalCpuCount=$([ $(uname) = 'Darwin' ] && 
                       sysctl -n hw.physicalcpu_max ||
                       lscpu -p | egrep -v '^#' | sort -u -t, -k 2,4 | wc -l)

# Print the values.
cat <<EOF
# of logical CPUs:  $logicalCpuCount
# of physical CPUS: $physicalCpuCount
EOF
####                  End of script to know the number of CPUs                     ####
#######################################################################################

# Uptime with load average
uptime

# Top processes sorted by RAM and CPu
# https://www.tecmint.com/find-linux-processes-memory-ram-cpu-usage/
ps -eo pid,ppid,cmd,%mem,%cpu --sort=-%mem | head

# All processes sorted by RAM and CPU
ps -eo pid,ppid,cmd,%mem,%cpu --sort=-%mem

# Freespace by mountpoint
df -h

# Calculate the size of a folder
du -hsc /home

# Calculate the size of each file or folder in a folder
du -hsc /etc/*

# Free memory
free -m

# More memory stats
vmstat -a -s

# Realtime stats
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