I have used diff command in past.I faced a situation to which I did not had a clue here are some text strings (which can be stored in a file)
CONFIG_XEN=y
CONFIG_XEN_PVHVM=y
CONFIG_XEN_MAX_DOMAIN_MEMORY=128
CONFIG_XEN_SAVE_RESTORE=y
CONFIG_XEN_DEBUG_FS=y
CONFIG_SWIOTLB_XEN=y
CONFIG_MICROCODE_XEN=y
CONFIG_XEN_DOM0=y
CONFIG_XEN_PRIVILEGED_GUEST=y
CONFIG_XEN_DOM0_PCI=y
CONFIG_XEN_PCI_PASSTHROUGH=y
CONFIG_PCI_XEN=y
CONFIG_XEN_PCIDEV_FRONTEND=y
CONFIG_XEN_BLKDEV_FRONTEND=y
CONFIG_NETXEN_NIC=m
CONFIG_XEN_NETDEV_FRONTEND=m
CONFIG_XEN_KBDDEV_FRONTEND=y
CONFIG_HVC_XEN=y
CONFIG_XEN_FBDEV_FRONTEND=y
CONFIG_XEN_BALLOON=y
CONFIG_XEN_SCRUB_PAGES=y
CONFIG_XEN_DEV_EVTCHN=y
CONFIG_XEN_BACKEND=y
CONFIG_XEN_NETDEV_BACKEND=m
CONFIG_XEN_BLKDEV_BACKEND=m
CONFIG_XEN_BLKDEV_TAP=m
CONFIG_XEN_BLKBACK_PAGEMAP=m
CONFIG_XEN_PCIDEV_BACKEND=m
CONFIG_XEN_PCIDEV_BACKEND_VPCI=y
CONFIG_XENFS=y
CONFIG_XEN_COMPAT_XENFS=y
CONFIG_XEN_SYS_HYPERVISOR=y
CONFIG_XEN_MCE=y
CONFIG_XEN_XENBUS_FRONTEND=y
CONFIG_XEN_GNTDEV=y
CONFIG_XEN_S3=y
CONFIG_ACPI_PROCESSOR_XEN=y
CONFIG_XEN_PLATFORM_PCI=m
I have to basically find above strings only (not any other) in a .config file of kernel which looks as follows
http://pastebin.com/AEQ6p9Vm It is a very big file.
Now I had no clue if by commands I can find the entries I first mentioned whether exist in second file or not so I did manually copied each entry and searched in the .config I mentioned.I found
there are following differences
# CONFIG_XEN_DEBUG_FS is not set CONFIG_XEN_BLKBACK_PAGEMAP <--- is
completely missing
# CONFIG_XEN_NETDEV_BACKEND is not set
# CONFIG_XEN_BLKDEV_BACKEND is not set
# CONFIG_XEN_BLKDEV_TAP is not set CONFIG_XENFS=y
# CONFIG_XEN_GNTDEV is not set
Can this be easily done by find grep or some thing similar?
