Notes.

General notes that I may need in future and I don’t know where to put them in Notes.app 📝

Shell Commands

ZSH (Oh-my-zsh)

• cd to history

    $ dirs -v
    $ cd -<TAB>
  

SSH

• show ssh key fingerprint:

    $ ssh-keygen -lf .ssh/id_rsa.pub
  

• generate keys:

    $ ssh-keygen -f ~/keyfile -t ecdsa -b 521
  

VIM

• Integrate with system clipboard:
  • copy selected part: visually select text(type v or V in normal mode) and type :w !pbcopy
  • copy the whole file :%w !pbcopy
  • paste from the clipboard :r !pbpaste

cURL

• resolve a hostname to custom IP:

    $ curl --resolve lubos.klokner.sk:443:127.0.0.1 https://lubos.klokner.sk/
  

• do not check the certificate:

    curl -k https://lubos.klokner.sk/
  

macOS

VMware Fusion

• Fix networking issues:

    $ sudo /Applications/VMware\ Fusion.app/Contents/Library/vmnet-cli --stop
    $ sudo /Applications/VMware\ Fusion.app/Contents/Library/vmnet-cli --start
  

Networking

• Allow packet forwarding

    $ sudo sysctl -w net.inet.ip.forwarding=1
  

Docker

Markup Cheat Sheet

F5 BIG-IP

• tcpdump:

    $ tcpdump -vvv -nni 0.0:nnn "(host [client_ip] and host [VS_ip]) or host [pool_member_ip]" -s0 -w /var/tmp/case_description.pcap
  

• license from CLI:

    $ get_dossier -b "base key" -a "actkey1,actkey2"
    # goto -> https://activate.f5.com & paste the dossier here
    # copy the license from the webpage
    $ cat - > /config/bigip.license
    # CTRL + D
    $ reloadlic
  

• reset to factory defaults (v13.0+):

    # tmsh load /sys config default
    # tmsh save /sys config partitions all