Bind / Unbind Low Port Number (less than 1024) to Some Program

• sudo setcap CAP_NET_BIND_SERVICE=+eip /path/to
• (/path/to can bind lower port without sudo)
• sudo setcap -r /path/to

HashiCorp Vault in Docker

Including this basically, but some extra arguments required:

• docker run --cap-add=IPC_LOCK -e 'VAULT_LOCAL_CONFIG={"backend": {"file": {"path": "/vault/file"}}, "default_lease_ttl": "168h", "max_lease_ttl": "720h", "ui": "true", "listener": {"tcp": {"address": "0.0.0.0:8200", "tls_disable": "true"}}}' -d --name vault -p 8200:8200 vault server

Then, you can visit http://localhost:8200/ui for initializing.

Get free Domain Name and SSL Certificate

If you have a Public IP Address and Linux OS running:

• get a free Domain Name from noip or duckdns
• install Docker
• follow this guideline

Docker CAS steps

• docker run -d --name cas -p 8443:8443 apereo/cas:v6.1.3
• [optional] docker logs cas, "<The following profiles are active: standalone>" shown.
• append "127.0.0.1 cas.example.org" to /etc/hosts
• visit https://cas.example.org:8443/cas
• login username: casuser, password Mellon

How to resolve "org.tmatesoft.svn.core.SVNException: svn: E175002: SSL peer shut down incorrectly"?

1. In Jenkins, Nodes > xxx > Monitoring > View Threads to find those threads which naming *svnkit*, kill them.
2. Nodes > xxx > Monitoring > Execute the garbage collector
3. Clean the workspace of related job

Linux nologin and recovery

• checkout someone's shell
• awk -F: '{print $7}' /etc/passwd
• change someone (root) to nologin
• sudo usermod -s `which nologin` root
• recovery
• sudo usermod -s /bin/bash root

SonarQube scan failed when .ts included

In a Jenkins job which invoke SonarQube, it failed with:

ERROR:     throw err;
ERROR:     ^
ERROR: 
ERROR: Error: Cannot find module 'typescript'

How to resolve this? Before SonarQube scanning, we need:

• npm install typescript