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strange behaviour for strace -f

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linux-howto

http://www.linuxquestions.org – Ran into a weird situation I had not seen before while using strace -f command I had to strace my 'passwd' command since I needed to debug something. But 'strace -f -o /tmp/file passwd' command failed to run eraser@viper-laptop:~$ strace -f -o /tmp/passwd1 passwd Changing password for eraser. (current) UNIX password: passwd: Authentication token manipulation error passwd: password unchanged If I drop -f option it works fine. I am using Ubuntu 10.4(Lucid Lynx), recently switched from fedora to ubuntu. Any idea what could be the issue ?? (HowTos)