Using Bash functions to tab complete SSHing into hosts

SSH by tab-completing and proxying through a bastion host. I use this in a production environment where my team SSH’s into 1000’s of networking devices and unix systems.

By creating naming schemes, such as: buildingcode-floor-systemtype-uniqid it makes finding the host very simple. The file can be placed in a shared folder through Dropbox, Box, Google Drive, etc., referenced by a Bash source statement, and used by the entire team.

Example .bashrc file:

# With a bastion host
function host1() {  ssh -t -A [email protected] "ssh [email protected]" ;}
function host2() {  ssh -t -A [email protected] "ssh [email protected]" ;}
function host3() {  ssh -t -A [email protected] "ssh [email protected]" ;}
function host4() {  ssh -t -A [email protected] "ssh [email protected]" ;}
# Without a bastion host
function host5() {  ssh host5.example.com ;}

Example run:

jemurray[email protected]:~ $ host1
Autopushing login request to phone...
Success. Logging you in...
Linux shell 4.19.0-6-cloud-amd64 #1 SMP Debian 4.19.67-2+deb10u1 (2019-09-20) x86_64

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Tue Apr 21 21:42:54 2020 from 2600:6c40:7e80:2515:e4c0:4484:93e6:a62b

Example if the tab is pressed after typing host<tab>:

[email protected]:~ $ host
host      host1     host2     host3     host4     host5     hostid    hostinfo  hostname
[email protected]:~ $ host

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