• brew
  • force the link and overwrite everything
  • rerurn postinstall
  • check brew configure file
  • whatprovide alternatives
  • tricky
  • brew command
• network
  • show network information
  • change order of networks
  • list hardware
  • IP
  • DNS
  • proxy setup
  • wifi
  • firewall

brew

force the link and overwrite everything

$ brew link --overwrite <formula>

• example

  $ brew link --overwrite --dry-run python@3.8
  Would remove:
  /usr/local/bin/python3 -> /usr/local/Cellar/python@3.9/3.9.0/bin/python3.9
  
  If you need to have this software first in your PATH instead consider running:
    echo 'export PATH="/usr/local/opt/python@3.8/bin:$PATH"' >> /Users/marslo/.bash_profile
  

rerurn postinstall

$ brew postinstall <formula>

• i.e.:

  $ sudo chown marslo:admin -R /usr/local/lib/python3.8/site-packages
  $ brew postinstall python@3.8
  ==> Postinstalling python@3.8
  ==> /usr/local/Cellar/python@3.8/3.8.6_1/bin/python3 -s setup.py --no-user-cfg install --force --verbose --install-scripts=/usr/local/Cellar/python@3.8
  ==> /usr/local/Cellar/python@3.8/3.8.6_1/bin/python3 -s setup.py --no-user-cfg install --force --verbose --install-scripts=/usr/local/Cellar/python@3.8
  ==> /usr/local/Cellar/python@3.8/3.8.6_1/bin/python3 -s setup.py --no-user-cfg install --force --verbose --install-scripts=/usr/local/Cellar/python@3.8
  

• update homebrew-cask

  $ git -C "/usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask" fetch --unshallow
  

check brew configure file

$ brew -v edit <formula>

• i.e.: $ brew -v edit openjdk

manual install formula

$ brew -v edit macvim
$ brew -v fetch --deps macvim
$ brew -v install --build-from-source macvim
$ brew pin macvim

whatprovide alternatives

$ pkgutil --file-info /usr/bin/qlmanage
volume: /
path: /usr/bin/qlmanage

pkgid: com.apple.pkg.Core
pkg-version: 10.15.0.1.1.1569789135
install-time: 1570542610
uid: 0
gid: 0
mode: 755

• for brew formula

  $ while read formula; do
      brew list --formula "${formula}" | grep -w magick;
    done < <(brew list --formula)
  

tricky

reference:

• Tips and Tricks

• interactive homebrew shell

  $ brew irb
  ==> Interactive Homebrew Shell
  Example commands available with: brew irb --examples
  
  WARNING: This version of ruby is included in macOS for compatibility with legacy software.
  In future versions of macOS the ruby runtime will not be available by
  default, and may require you to install an additional package.
  
  irb(main):001:0>
  

• list dependencies

  $ brew deps macvim
  Warning: Treating macvim as a formula. For the cask, use homebrew/cask/macvim
  cscope
  gdbm
  gettext
  libyaml
  lua
  openssl@1.1
  python@3.9
  readline
  ruby
  sqlite
  xz
  

• list who depends on

  $ brew uses --installed cscope
  macvim
  

• list all formula dpendencies

  $ brew list | while read cask; do
      echo -e -n "\e[1;34m$cask ->\e[0m";
      brew deps $cask | awk '{printf(" %s ", $0)}';
      echo "";
    done
  

  • e.g.:

    $ brew list | while read cask; do
        echo -e -n "\e[1;34m$cask ->\e[0m";
        brew deps $cask | awk '{printf(" %s ", $0)}';
        echo "";
      done
    
    Warning: Calling `brew list` to only list formulae is deprecated! Use `brew list --formula` instead.
    ack ->
    adns ->
    aom ->
    autoconf ->
    autoconf-archive -> autoconf
    automake -> autoconf
    bash ->
    bash-completion ->
    bash-completion@2 -> bash
    bats ->
    bdw-gc ->
    berkeley-db -> openssl@1.1
    binutils ->
    cabal-install -> ghc
    cairo -> fontconfig  freetype  gdbm  gettext  glib  libffi  libpng  lzo  openssl@1.1  pcre  pixman  python@3.8  readline  sqlite  xz
    ...
    

brew command

• brew analytics

  # turn on/off
  $ export HOMEBREW_NO_ANALYTICS=1/0
  $ brew analytics off/on
  
  # check status
  $ brew analytics
  InfluxDB analytics are enabled.
  Google Analytics were destroyed.
  

network

show network information

$ networksetup -listnetworkserviceorder
An asterisk (*) denotes that a network service is disabled.
(1) USB 10/100/1000 LAN
(Hardware Port: USB 10/100/1000 LAN, Device: en7)

(2) Wi-Fi
(Hardware Port: Wi-Fi, Device: en0)

...

• or

  $ networksetup -listallnetworkservices
  An asterisk (*) denotes that a network service is disabled.
  USB 10/100/1000 LAN
  Wi-Fi
  Bluetooth PAN
  Thunderbolt Bridge
  

change order of networks

$ networksetup -ordernetworkservices "Wi-Fi" "Ethernet" "USB Ethernet"

list hardware

$ networksetup -listallhardwareports

• list detail of hardware

  $ networksetup -getinfo 'USB 10/100/1000 LAN'
  DHCP Configuration
  IP address: 192.168.1.10
  Subnet mask: 255.255.255.0
  Router: 192.168.1.1
  Client ID:
  IPv6: Automatic
  IPv6 IP address: none
  IPv6 Router: none
  Ethernet Address: **:**:**:**:**:**
  

IP

• find local device ip address

  $ arp -a
  

DNS

• Get Info

  $ scutil --dns
  DNS configuration
  resolver #1
  ...
  resolver #7
  
  DNS configuration (for scoped queries)
  resolver #1
    search domain[0] : ...
    nameserver[0] : ...
    nameserver[1] : ...
    nameserver[2] : ...
    if_index : ...
    flags    : ...
    reach    : ...
  

• setup DNS

  $ networksetup -getdnsservers Wi-Fi
  There aren't any DNS Servers set on Wi-Fi.
  

$ networksetup -setdnsservers Wi-Fi 192.168.236.5 192.168.35.78 192.168.2.69 192.168.200.139

$ networksetup -getdnsservers Wi-Fi
192.168.236.5
192.168.35.78
192.168.2.69
192.168.200.139

$ cat /etc/resolv.conf
nameserver 192.168.236.5
nameserver 192.168.35.78
nameserver 192.168.2.69
nameserver 192.168.200.139

proxy setup

$ networksetup -getwebproxy Wi-Fi
Enabled: No
Server:
Port: 0
Authenticated Proxy Enabled: 0
$ networksetup -getwebproxy Ethernet
Enabled: No
Server:
Port: 0
Authenticated Proxy Enabled: 0

$ networksetup -getproxybypassdomains Ethernet
*.local
169.254/16

$ scutil --proxy
<dictionary> {
  HTTPEnable : 0
  HTTPSEnable : 0
  ProxyAutoConfigEnable : 1
  ProxyAutoConfigURLString : http://pac.domain.com/global-pac.pac
  SOCKSEnable : 0
}

wifi

• get wifi name connection currently

  $ networksetup -getairportnetwork en0
  Current Wi-Fi Network: WLAN-PUB
  

• connect to another

  $ networksetup -setairportnetwork en0 WLAN-PUB <wifi-password>
  $ networksetup -getairportnetwork en0
  Current Wi-Fi Network: WLAN-PUB
  
  $ networksetup -setairportnetwork en0 Automation-4G <wifi-password>
  $ networksetup -getairportnetwork en0
  Current Wi-Fi Network: Automation-4G
  

• turn on/off wifi

  $ networksetup -setairportpower en0 on
  $ networksetup -getairportpower en0
  Wi-Fi Power (en0): On
  
  $ networksetup -setairportpower en0 off
  $ networksetup -getairportpower en0
  Wi-Fi Power (en0): Off
  

• scan available wifi network

  $ networksetup -setairportpower en0 on
  $ sudo /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -s
                              SSID BSSID             RSSI CHANNEL HT CC SECURITY (auth/unicast/group)
                          Customer **:**:**:**:**:** -75  11      N  CN WEP
                          CorpWLAN **:**:**:**:**:** -72  1       Y  CN WPA2(802.1x,Unrecognized(0)/AES/AES)
                             Guest **:**:**:**:**:** -71  1       Y  CN NONE
  

• disable ipv6

  $ networksetup -listallnetworkservices
  An asterisk (*) denotes that a network service is disabled.
  USB 10/100/1000 LAN
  Wi-Fi
  Bluetooth PAN
  Thunderbolt Bridge
  
  $ networksetup -setv6off 'USB 10/100/1000 LAN'
  $ networksetup -setv6off Wi-fi
  

  • undo

    $ networksetup -setv6automatic 'USB 10/100/1000 LAN'
    $ networksetup -setv6automatic Wi-Fi
    

• show network connection history

  $ defaults read /Library/Preferences/SystemConfiguration/com.apple.airport.preferences \
             | grep LastConnected -A 7
  

get wifi password

• list all Wifi

  $ defaults read /Library/Preferences/SystemConfiguration/com.apple.airport.preferences | \grep SSIDString
  ...
  SSIDString = "Apple Network Guest";
  ...
  

• get password

  $ sudo security find-generic-password -ga "Apple Network Guest"  | grep password\:
  password: "guest@3742"
  

firewall

• show status

  $ sudo /usr/libexec/ApplicationFirewall/socketfilterfw --getglobalstate
  Firewall is disabled. (State = 0)
  

• enable firewall

  $ sudo /usr/libexec/ApplicationFirewall/socketfilterfw --setglobalstate on