Usually , during Linux boot-up process - enabled services are automatically started in the order of service sequence. Sometimes during debugging or recovery it may be required to start services interactively - one by one. RedHat Linux supports this option - as described in below steps.
- Login to console
- Boot Linux
- After the Redhat kernel image splash screen appears & Filesystems are mounted - continuously press hold letter ' I ' (case -insensitive)
- If continuous press hold doesn't work out , keep pressing the letter I multiple times.
- Services startup enters into Interactive mode as shown in below snapshot
- Required services may be started using the options Yes/No/Continue options.
Hope this may be useful to some debugging strange services !!