Mac High Sierra（10.13以降）のターミナルでtelnetやftpを復活させる方法

こんにちは、鯨井貴博@opensourcetechです。

Mac High Sierra（10.13以降）のターミナルでは、

telnetやftpが廃止され、sshやscpを推奨されるようになりました。

support.apple.com

bash-3.2$ telnet
bash: telnet: command not found・・・確かにない！！
bash-3.2$ ftp
bash: ftp: command not found・・・確かにない！！

しかし、既存環境にあるConsoleサーバやその他ssh未対応のサーバなどの為に、

telnetやftpを使いたいケースはあるかと思います。

なので、そういう方々の為の記事です。

事前準備（Homebrew）

Homebrewを使いますので、

入っていない方は以下の記事を見ながら環境を用意してください。

opensourcetech.hatenablog.jp

telnet/ftpの復活方法

bash-3.2$ brew install inetutils・・・inetutilsパッケージをインストール
Updating Homebrew...
==> Auto-updated Homebrew!

Updated 1 tap (homebrew/core).
==> New Formulae
bat eccodes fork-cleaner pgweb wireguard-go
==> Updated Formulae
ace imagemagick@6 pegtl
acpica imapsync perkeep
akamai inetutils petsc
angular-cli ipfs pgpdump
annie ipython pgroonga
apibuilder-cli ipython@5 pianobar
aptly iso-codes pianod
armadillo jabba pidgin
asciidoctor jboss-forge pipenv
avimetaedit jemalloc pod2man
awscli jenkins poppler
azure-cli jenkins-lts postgis
babeld jhiccup postgresql
bartycrouch jhipster postgresql@9.4
bettercap joplin postgresql@9.5
bit json-c postgresql@9.6
bitrise just postgrest
bluepill knot pound
byacc kompose presto
caddy konoha proguard
cargo-completion kube-aws proxytunnel
cask kubeless pulseaudio
cfitsio kubernetes-cli pyinvoke
cfssl kubernetes-helm qbs
chakra landscaper qcachegrind
chamber libbi quicktype
citus libfabric rabbitmq
clojure libgphoto2 rabbitmq-c
closure-compiler libidn raine
cocoapods liblwgeom rakudo-star
conan libmypaint raylib
consul libpq rebar@3
convox libpqxx remarshal
dartsim libqalculate reminiscence
dash libraw rhino
dcd libsoup riemann-client
diamond libswiften rocksdb
direnv libu2f-host rsyslog
dnscrypt-proxy libu2f-server rust
docker libuv s-nail
docker-completion links sbt
doitlive lmod schismtracker
dscanner loudmouth shogun
dxpy lxc siril
elektra lz4 skafos
elixir mariadb@10.1 skipfish
emscripten maxwell sleuthkit
erlang mcabber snakemake
erlang@19 media-info snownews
etcd mercurial solr
ethereum metabase source-to-image
faas-cli micropython spigot
fabric mikutter spring-roo
fastd miniupnpc streamlink
feh mlt stubby
flow mongodb@3.2 sundials
fluent-bit mpc synfig
fn mpfi telegraf
folly mpw teleport
freediameter msgpack texmath
frugal n tile38
fstrm nano tippecanoe
gandi.cli ndpi tmuxinator-completion
gauge neomutt todoman
gdal newsboat tracebox
gegl nghttp2 traefik
get_iplayer node ttyd
getdns node-build u-boot-tools
git-annex node@8 unrar
git-ftp nsd vagrant-completion
gjs ntopng vtk
gnumeric odpi webpack
goenv open-mpi winetricks
goffice osm2pgrouting wireguard-tools
grafana osquery wtf
groovy osrm-backend xsv
grpc pam-u2f yaf
gtksourceview@4 pandoc ykman
gx paps ykpers
gx-go passenger youtube-dl
heroku pcb yq
hesiod pdal zabbix
hopenpgp-tools pdfpc zanata-client
hugo pdns zmap
imagemagick pdsh
==> Deleted Formulae
bokken

Error: Failed to link all completions, docs and manpages:
Permission denied @ rb_file_s_symlink - (../../../Homebrew/completions/zsh/_brew, /usr/local/share/zsh/site-functions/_brew)
==> Installing dependencies for inetutils: libidn
==> Installing inetutils dependency: libidn
==> Downloading https://homebrew.bintray.com/bottles/libidn-1.35.high_sierra.bot
######################################################################## 100.0%
==> Pouring libidn-1.35.high_sierra.bottle.tar.gz
==> Caveats
Emacs Lisp files have been installed to:
/usr/local/share/emacs/site-lisp/libidn
==> Summary
🍺 /usr/local/Cellar/libidn/1.35: 72 files, 1.4MB
==> Installing inetutils
==> Downloading https://homebrew.bintray.com/bottles/inetutils-1.9.4_1.high_sier
######################################################################## 100.0%
==> Pouring inetutils-1.9.4_1.high_sierra.bottle.tar.gz
==> Caveats
The following commands have been installed with the prefix 'g'.