UtilTools

tee

#tee
When using tee, we transfer the received output and use the pipe (|) to forward it to tee.
The most basic usage of the tee command is to display the standard output (stdout) of a program and write it to a file.

Example:
#diskfree
we are using the df  get information about the amount of available disk space on the file system. The output is piped to the teecommand, which displays the output to the terminal and writes the same information to the file disk_usage.txt.

➜  ~ df -h | tee usage.txt

Filesystem       Size   Used  Avail Capacity iused     ifree %iused  Mounted on
/dev/disk1s5s1  233Gi   14Gi   48Gi    24%  502388 504039040    0%   /
devfs           337Ki  337Ki    0Bi   100%    1164         0  100%   /dev
/dev/disk1s4    233Gi  4.0Gi   48Gi     8%       5 504039040    0%   /System/Volumes/VM
/dev/disk1s2    233Gi  433Mi   48Gi     1%    2701 504039040    0%   /System/Volumes/Preboot
/dev/disk1s6    233Gi  6.2Mi   48Gi     1%      18 504039040    0%   /System/Volumes/Update
/dev/disk1s1    233Gi  165Gi   48Gi    78% 3441348 504039040    1%   /System/Volumes/Data
map auto_home     0Bi    0Bi    0Bi   100%       0         0  100%   /System/Volumes/Data/home

Here is another simple example that saves kernel messages while still showing them on screen:

dmesg | tee /tmp/dmesg.log

awk

#awk
Awk is a text-processing language for extracting columns, filtering records, and reshaping structured data on the command line. It is built into every Linux and Unix system and handles tasks ranging from one-line column extraction to multi-stage data analysis.

ping

#ping
Ping works by sending one or more ICMP (Internet Control Message Protocol) Echo Request packets to a specified destination IP on the network and waiting for a reply. When the destination receives the packet, it responds with an ICMP echo reply. Check icmp

ping -c 1 "ip address"