how to solve exec format error?

[justforfun2]

run-init:/sbin/init/:Exec format error
［ 1.440167] Kernal panic-not syncing :Attempted to kill init!
［ 1.440205] Pid:1,comm:run-init Not tainted 3.2.0-70-generic-ape ＃105-Ubuntu
［ 1.440241] Call Trace:
［ 1.440281] ［〈c1598b6e〉］ ? printk+0x2d/0x2f
［ 1.440317] ［〈c1598a3c〉］ panic+0x5c/0x161
［ 1.440354] ［〈c105ec64〉］ forget_original_parent+0x1e4/0x1f0

[ajgreeny]

When do you see this problem?
Can you boot the system at all or is this during installation?

[SeijiSensei]

run-init:/sbin/init/:Exec format error

The trailing slash indicates a directory, not the file /sbin/init. Since a directory is not executable, you get the format error. Is this something you created yourself? I don't recall ever seeing this problem on a vanilla Ubuntu installation. Just remove the trailing slash from wherever /sbin/init is invoked.