what is fastboot option
 

Hi team,

Please let me know what is the usage of fastboot of while starting editing kernal like this.

kernel /vmlinuz-2.6.18-92.1.22.el5 ro root=LABEL=/ rhgb quiet fastboot

thanks
abdul

It's well documented on the Red Hat knowledgebase...did you look there, since you're paying for access to it, right?
https://access.redhat.com/site/docum...xec-tools.html

TB0ne, since the OP does not state which distribution he uses we can't know if that is in fact RHEL, it can also be CentOS or Scientific Linux, they all use the same naming scheme for their kernels.

@a.abdulna: The fastboot option was introduced with the 2.6.29 kernels, although it is possible that Red Hat ported them back to their version of the 2.6.18 kernel. Basically, it tries to speed up boot time by starting some functions asynchronously, which may have an effect, but doesn't have to.

True, but since most all of the OP's other threads indicate they're using RHEL, it seemed safe to assume, especially when they mentioned the kernel with "el5" in it.
That's why I told the OP to call Red Hat, and look in their knowledgebase, since they'd know about which things were in which kernels.