SSH: Difference between revisions
Created page with "== Setting up SSH in OS X == Quick setup guide for enabling SSH access to a Mac from another machine. === On Target Mac (Server) === ==== Enable SSH ==== * '''macOS Ventura/Sonoma:''' System Settings → General → Sharing → Toggle "Remote Login" ON * '''Older macOS:''' System Preferences → Sharing → Check "Remote Login" * Note the IP address displayed (e.g., <code>192.168.1.XXX</code>) ==== Get IP Address ==== <syntaxhighlight lang="bash"> ifconfig | grep "in..." |
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==== Get IP Address ==== | ==== Get IP Address ==== | ||
< | <pre> | ||
ifconfig | grep "inet " | grep -v 127.0.0.1 | ifconfig | grep "inet " | grep -v 127.0.0.1 | ||
</ | </pre> | ||
==== Prevent Sleep (Optional) ==== | ==== Prevent Sleep (Optional) ==== | ||
< | <pre> | ||
# Disable sleep on AC power | # Disable sleep on AC power | ||
sudo pmset -c sleep 0 | sudo pmset -c sleep 0 | ||
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# Keep WiFi alive during sleep | # Keep WiFi alive during sleep | ||
sudo pmset -c womp 1 | sudo pmset -c womp 1 | ||
</ | </pre> | ||
=== On Client Mac (Controller) === | === On Client Mac (Controller) === | ||
==== Test Connection ==== | ==== Test Connection ==== | ||
< | <pre> | ||
</ | </pre> | ||
==== Setup SSH Keys ==== | ==== Setup SSH Keys ==== | ||
< | <pre> | ||
# Generate key if needed | # Generate key if needed | ||
ls ~/.ssh/id_rsa.pub || ssh-keygen -t rsa -b 4096 | ls ~/.ssh/id_rsa.pub || ssh-keygen -t rsa -b 4096 | ||
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# Copy key to target Mac | # Copy key to target Mac | ||
ssh-copy-id [email protected] | ssh-copy-id [email protected] | ||
</ | </pre> | ||
==== Create SSH Config ==== | ==== Create SSH Config ==== | ||
Add to <code>~/.ssh/config</code>: | Add to <code>~/.ssh/config</code>: | ||
< | <pre> | ||
Host imac | Host imac | ||
HostName 192.168.1.XXX | HostName 192.168.1.XXX | ||
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ServerAliveInterval 30 | ServerAliveInterval 30 | ||
ServerAliveCountMax 3 | ServerAliveCountMax 3 | ||
</ | </pre> | ||
Now connect with: <code>ssh imac</code> | Now connect with: <code>ssh imac</code> | ||
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==== Install Mosh ==== | ==== Install Mosh ==== | ||
On both machines: | On both machines: | ||
< | <pre> | ||
brew install mosh | brew install mosh | ||
</ | </pre> | ||
Connect with: <code>mosh [email protected]</code> | Connect with: <code>mosh [email protected]</code> | ||
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==== SSH Connection Refused ==== | ==== SSH Connection Refused ==== | ||
< | <pre> | ||
# Check if SSH is running | # Check if SSH is running | ||
sudo systemsetup -getremotelogin | sudo systemsetup -getremotelogin | ||
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# Check firewall | # Check firewall | ||
sudo /usr/libexec/ApplicationFirewall/socketfilterfw --getglobalstate | sudo /usr/libexec/ApplicationFirewall/socketfilterfw --getglobalstate | ||
</ | </pre> | ||
==== WiFi Keepalive Script ==== | ==== WiFi Keepalive Script ==== | ||
< | <pre> | ||
cat > ~/keepalive.sh << 'EOF' | cat > ~/keepalive.sh << 'EOF' | ||
#!/bin/bash | #!/bin/bash | ||
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chmod +x ~/keepalive.sh | chmod +x ~/keepalive.sh | ||
nohup ~/keepalive.sh & | nohup ~/keepalive.sh & | ||
</ | </pre> | ||
[[Category:SSH]] | [[Category:SSH]] | ||
[[Category:macOS]] | [[Category:macOS]] | ||
[[Category:Networking]] | [[Category:Networking]] | ||
Latest revision as of 13:32, 14 August 2025
Setting up SSH in OS X
Quick setup guide for enabling SSH access to a Mac from another machine.
On Target Mac (Server)
Enable SSH
- macOS Ventura/Sonoma: System Settings → General → Sharing → Toggle "Remote Login" ON
- Older macOS: System Preferences → Sharing → Check "Remote Login"
- Note the IP address displayed (e.g.,
192.168.1.XXX)
Get IP Address
ifconfig | grep "inet " | grep -v 127.0.0.1
Prevent Sleep (Optional)
# Disable sleep on AC power sudo pmset -c sleep 0 sudo pmset -c disablesleep 1 # Keep WiFi alive during sleep sudo pmset -c womp 1
On Client Mac (Controller)
Test Connection
ssh [email protected]
Setup SSH Keys
# Generate key if needed ls ~/.ssh/id_rsa.pub || ssh-keygen -t rsa -b 4096 # Copy key to target Mac ssh-copy-id [email protected]
Create SSH Config
Add to ~/.ssh/config:
Host imac
HostName 192.168.1.XXX
User username
ServerAliveInterval 30
ServerAliveCountMax 3
Now connect with: ssh imac
For Unstable Connections
Install Mosh
On both machines:
brew install mosh
Connect with: mosh [email protected]
Troubleshooting
SSH Connection Refused
# Check if SSH is running sudo systemsetup -getremotelogin # Force enable sudo systemsetup -setremotelogin on # Check firewall sudo /usr/libexec/ApplicationFirewall/socketfilterfw --getglobalstate
WiFi Keepalive Script
cat > ~/keepalive.sh << 'EOF'
#!/bin/bash
while true; do
ping -c 1 192.168.1.1 # Router IP
sleep 30
done
EOF
chmod +x ~/keepalive.sh
nohup ~/keepalive.sh &