Unable to chroot /mnt/sysimage

I'm working on a RH 7.3 with some issues on the partitions so It doesn't boot properly and goes in emergency mode. I booted the machine from an RH 7.3 iso and I need to extract an sosreport in Rescue mode but I have the following errors: chroot /mnt/sysimage chroot: failed to run command '/bin/sh': No such file or directory So I use the following command as in the page https://access.redhat.com/solutions/43133 : ln -s bash /mnt/sysimage/bin/sh but I'm getting the error message: ln: failed to create symbolic link /mnt/sysimage/bin/sh: No such file or directory Could you help me please?