linux - Update dns name after changing hostname -


i have linux device , want change hostname , dns name.

so when change hostname of device changing /etc/hostname , doing hostname -f /etc/hostname hostname changed.
when try connect device new hostname not working, instead can connect old one.
after reboot, can connect new hostname.

how change/update hostname network don't have reboot? keeping in mind use busybox , image built yocto.


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