No support for open source projects
Many believe that open source projects cannot be used in the enterprise because of the lack of support. This is untrue.
GNU Screen cheatsheet
| Change to other region | ctrl-a tab |
| Change to other screen | ctrl-a 0-9 |
| Detach | ctrl-a d |
| Help | ctrl-a ? |
| Kill screen | ctrl-a \ |
| Kill region | ctrl-a x |
| New screen | ctrl-a c |
| Reattach | screen -r |
| Serial connection | screen /dev/ttyUSB0 9600 |
| Split | ctrl-a s |
Subversion Cheatsheet
| Add to working copy | svn add |
| Backup to hot copy | hot-backup.py /opt/svn /opt/svn-backup |
| Change log view | svn log file:///opt/svn/scripts/firewall/firewall-new |
| Checkout | svn checkout file:///opt/svn/profile |
| Commit changes | svn commit --message "Your log message" |
| Copy to working copy | svn copy |
| Create respository | svnadmin create --fs-type fsfs /opt/svn |
| Delete from working copy | svn delete |
| Diff changes | svn diff |
| Initial Import | svn import . file:///opt/svn --message "Initial import" |
| Merging to current directory | svn merge |
| Move file in working copy | svn move |
| Remote Checkout | svn checkout svn+ssh:// |
| Revert all changes | svn revert |
| Review changes | svn status |
| Review commit log | svn log |
| Update working copy | svn update |
| View file | svn cat file:///opt/svn/profile/.profile |
| View repository tree | svnlook tree /opt/svn |
CFEngine tutorial
Overview
CFEngine is a configuration management tool that allows a system administrator to configure multiple hosts continuously. CFEngine runs as a client/server application. The server provides new configurations, or policy, while the client works to ensure that a client host conforms to them.
Heartbeat 2 cheatsheet
Commands
| List cluster resources. | crm_resource -L |
| Dump cluster configuration as xml to stdout. | cibadmin -Q |
| Place node in standby (maintenance mode). Technically this is adding the standby property. | crm_standby -U |
| Place local node in standby. | crm_standby -v true |
| Place node online or remove the standby property. | crm_standby -D -U |
| Place local node online or remove standby property. | crm_standby -D |
| View cluster status. One time to stdout. | crm_mon -1 |
| View cluster status. Refresh every 3s. | crm_mon -i3 |
| One line simple output. | crm_mon -s |
| Show inactive resources. | crm_mon -r |
| Stop resource. | crm_resource -r |
| Start resource. | crm_resource -r |
| Clear failed resource. | crm_resource -C -H |
| Query running cluster for current state (STDOUT). | cibadmin -Q --obj_type resources |