Wireshark and tcpdump are extremely powerful network troubleshooting tools. Here are some command examples that may be useful.

Wireshark Display Filters

Show all ARP:
arp
Show ARP from a specific MAC:
arp.src.hw_mac == 00:16:D3:4A:CE:7D
Show all traffic to a specific IP:
ip.src == 10.14.1.16
Show all traffic to/from a specific IP:
ip.addr == 10.14.1.16
Show only SYN packets:
tcp.flags.syn
Show all web traffic:
tcp.port == 80

Get into the correct directory:

cd /etc/pki/tls/certs

Generate key

openssl genrsa -des3 -out mike.key 4096

chmod 600 mike.key

Generate signing request

openssl req -new -key mike.key -out mike.csr

chmod 600 mike.csr

Get the CA to sign the request

openssl x509 -req -days 10000 -in mike.csr -out mike.cert \

-CA /etc/pki/tls/certs/army.ca/Army.ca_CA.cer \

Windows CLI

Windows and command line go together like ice-cream and pickles, but there are actually some neat commands you can lean on to get things done. Here are some that I've discovered.

Yes, some distros still use rpm.

Extract files from an RPM:

rpm2cpio filename.rpm | cpio -idv

Unpack an RPM into /tmp/deleteme without installing it:

rpm -ivh -root /tmp/deleteme --nodeps --noscripts package.rpm

Install

rpm -ivh

Upgrade (use this except for kernels)

rpm -Uvh

Find out what's installed

rpm -qa

See which package a file belongs to

rpm -qf