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How to save new password of root


Leo
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I changed the password of root , but the new password get lost when reboot the PPMAC.

How to save the new password?

Since I have no idea about Linux, a few other questions need answer.

How to install LINUX program through POWER IDE? Will it be saved in flash?

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See this thread: http://forums.deltatau.com/showthread.php?tid=83

 

Here is the short version. Mount the filesystem as read-write by issuing:

 

mount -o remount,rw /

 

Then use passwd to change the root password. When you are finished, sync the filesystem and remount as read-only:

 

cd /.readonly/etc-tmpfs-mirror/
cp -a * ../etc/
cd /.readonly/root-tmpfs-mirror/
cp -a * ../root/
cd /.readonly/var-tmpfs-mirror/
cp -a * ../var/
mount -o remount,ro / 

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Thank you shansen.

 

When I run your first "cp" step I get the following error.

 

/# cp -a * ../etc/

cp: writing `../etc/bin/bzcat': No space left on device

cp: writing `../etc/bin/gunzip': No space left on device

cp: writing `../etc/bin/bzip2': No space left on device

 

is there something that I am doing wrong?

 

 

See this thread: http://forums.deltatau.com/showthread.php?tid=83

 

Here is the short version. Mount the filesystem as read-write by issuing:

 

mount -o remount,rw /

 

Then use passwd to change the root password. When you are finished, sync the filesystem and remount as read-only:

 

cd /.readonly/etc-tmpfs-mirror/
cp -a * ../etc/
cd /.readonly/root-tmpfs-mirror/
cp -a * ../root/
cd /.readonly/var-tmpfs-mirror/
cp -a * ../var/
mount -o remount,ro / 

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Hmmm. Check the output of df -h to make sure you have free disk space. Also check df -i to make sure you haven't run out of inodes. If you have a logger writing a lot of small files you could potentially have free disk space but run out of inodes.

 

At this point I would reboot the Power PMAC, change the password, and then sync the filesystem.

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Also, why is it trying to copy bzcat, gunzip, etc? Are you sure that you ran the cd /.readonly/etc-tmpfs-mirror/ command to switch directories before the cp -a * ../etc? My /.readonly/etc-tmpfs-mirror folder has the following contents:

 

root@etc-tmpfs-mirror: ls -l
total 12
-rwxr-xr-x 1 root root   283 2011-03-16 08:24 hosts
-rw-r--r-- 1 root root   678 2015-05-09 06:31 mtab
drwxrwxrwx 3 root root    80 2011-03-16 08:24 network
-rw-r----- 1 root shadow 728 2015-05-08 15:05 shadow
drwxr-xr-x 3 root root    60 2009-10-08 11:52 udev
-r--r--r-- 1 root root     0 1981-08-26 17:25 .wh..wh.aufs
drwx------ 2 root root    40 1981-08-26 17:25 .wh..wh.orph
drwx------ 2 root root    40 1981-08-26 17:25 .wh..wh.plnk
root@etc-tmpfs-mirror:

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Thanks Shansen!

 

I think I got it to work. I put an extra space by accident in between the "/" and the "." in that cd command. It seems that the password has stayed now.

 

I just tried uploading new code however, and I'm getting the following error

"Could not Connect to Power Pmac FTP client, ...."

 

I think this is because I changed the password because it started only after I had changed the password. Any ideas?

 

thanks,

windell

 

 

Also, why is it trying to copy bzcat, gunzip, etc? Are you sure that you ran the cd /.readonly/etc-tmpfs-mirror/ command to switch directories before the cp -a * ../etc? My /.readonly/etc-tmpfs-mirror folder has the following contents:

 

root@etc-tmpfs-mirror: ls -l
total 12
-rwxr-xr-x 1 root root   283 2011-03-16 08:24 hosts
-rw-r--r-- 1 root root   678 2015-05-09 06:31 mtab
drwxrwxrwx 3 root root    80 2011-03-16 08:24 network
-rw-r----- 1 root shadow 728 2015-05-08 15:05 shadow
drwxr-xr-x 3 root root    60 2009-10-08 11:52 udev
-r--r--r-- 1 root root     0 1981-08-26 17:25 .wh..wh.aufs
drwx------ 2 root root    40 1981-08-26 17:25 .wh..wh.orph
drwx------ 2 root root    40 1981-08-26 17:25 .wh..wh.plnk
root@etc-tmpfs-mirror:

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This might be an IDE issue. We don't typically use the Delta Tau IDE, so I don't know if they let you specify a non-standard root password.

 

I just tried connecting to the FTP on one of our Power PMACs by browsing to ftp://[iP ADDRESS] in Windows explorer and everything worked correctly.

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