06/04/96, 4FAX# 4825 Recovery From rm * From the Root (/) Directory SPECIAL NOTICES Information in this document is correct to the best of our knowledge at the time of this writing. Please send feedback by fax to "AIXServ Information" at (512) 823-4009. Please use this information with care. IBM will not be responsible for damages of any kind resulting from its use. The use of this information is the sole responsibility of the customer and depends on the customer's ability to eval- uate and integrate this information into the customer's operational environment. +----------------------------------------------------------+ | | | NOTE: The information in this document has NOT been | | verified for AIX 4.1. | | | +----------------------------------------------------------+ ABOUT THIS DOCUMENT This document describes steps to recover after executing the rm command in the root directory. SUMMARY OF THE RECOVERY PROCEDURE Deleting the files in the root directory will delete the links: bin -> /usr/bin bootrec -> /usr/sbin/bootrec lib -> /usr/lib u -> /home unix -> /usr/lib/boot/unix In the root directory, removing the bin link disables the korn shell needed for login. The recovery will boot in service mode and rebuild the links. STEPS 1. Turn the key to the Service position. 2. With BOSboot or installation media OF THE SAME VERSION AND LEVEL AS THE OPERATING SYSTEM, boot the system. Recovery From rm * From the Root (/) Directory 1 06/04/96, 4FAX# 4825 +----------------------------------------------------------+ | | | WARNING: If you boot a 3.2 system with 3.1 media, or | | boot a 3.1 system with 3.2 media, then you will not be | | able to use the standard scripts (getrootfs or | | /etc/continue) to bring your workstation into full main- | | tenance mode. | | | | Moreover, performing the scripts on a 3.1 system with | | 3.2 boot media may actually remove some files and | | prevent your system from booting successfully in normal | | mode until missing files (/etc/mount and /etc/umount) | | are replaced on the disk. | | | +----------------------------------------------------------+ Notes a. For information on BOSboot diskettes, refer to InfoExplorer or order fax #2462 from 1-800-IBM-4FAX (or 415-855-4FAX outside the U.S. from a fax machine phone). b. If booting from diskettes, when you see LED c07, insert the next diskette. This may be the optional display extensions diskette (required for AIX 3.2.5) or the display diskette. c. If you have AIX 3.2.5, used a fddi network install, and selected that option for the install device, you will need the communications extensions diskette. If this diskette is not available, you can build it from another system with fddi installed or call your branch office for assistance. Follow the prompts to the installation/maintenance menu. 3. Choose the maintenance shell option 4 4. Determine the hdisk# to use with the getrootfs or /etc/continue command. If you have only one disk, then "hdisk0" is the proper hdisk# to use. If you have more than one disk, do the following: o For AIX 3.2.4 or later run: getrootfs The output indicates the disk that should be used with getrootfs in the next step. o For AIX 3.1 to 3.2.3E run: lqueryvg -Atp hdisk# | grep hd5 for each hdisk# (hdisk0, hdisk1, etc.) until you get output that looks like: 00005264feb3631c.2 hd5 1 Recovery From rm * From the Root (/) Directory 2 06/04/96, 4FAX# 4825 The exact output you get will be different but will follow the form: large_number.x hd5 1 You may find more than one disk has this output. These will all be disks which belong to the rootvg volume group. You may use any of the disks identi- fied to be in rootvg in the following step. 5. On the hdisk discovered above run: getrootfs hdisk# sh If you get errors from getrootfs, do not continue with the rest of this procedure. Correct the problem causing the error. If you need assistance correcting the problem causing the error, contact one of the following: o local branch office o your point of sale o 1-800-CALL-AIX (to register for fee-based services) All of the above avenues for assistance may be billable. 6. mount the root filesystem with: fsck -y /dev/hd4 mount /dev/hd4 /mnt 7. rebuild the missing links with: cd /mnt ln -s /usr/bin bin ln -s /usr/lib/boot/unix unix ln -s /usr/sbin/bootrec bootrec ln -s /usr/lib lib ln -s /home u 8. Type the following: cd / | umount /dev/hd4 | exit | sync;sync;sync turn the key back to normal mode reboot 9. This should allow the machine to reboot in normal mode so that you can login. Depending what else was in the root directory, you will probably have to restore files from a backup tape at this point. Recovery From rm * From the Root (/) Directory 3 06/04/96, 4FAX# 4825 READER'S COMMENTS Please fax this form to (512) 823-4009, attention "AIXServ Informa- tion". You may also e-mail comments to: elizabet@austin.ibm.com. These comments should include the same customer information requested below. Use this form to tell us what you think about this document. If you have found errors in it, or if you want to express your opinion about it (such as organization, subject matter, appearance) or make sug- gestions for improvement, this is the form to use. If you need technical assistance, contact your local branch office, point of sale, or 1-800-CALL-AIX (for information about support offer- ings). These services may be billable. Faxes on a variety of sub- jects may be ordered free of charge from 1-800-IBM-4FAX. Outside the U.S. call 415-855-4329 using a fax machine phone. When you send comments to IBM, you grant IBM a nonexclusive right to use or distribute your comments in any way it believes appropriate without incurring any obligation to you. NOTE: If you have a problem report or item number, supplying that number may help us determine why a procedure did or did not work in your specific situation. Problem Report or Item #: Branch Office or Customer #: Be sure to print your name and fax number below if you would like a reply: Name: Fax Number: ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ END OF DOCUMENT (recover.rm.root.32.cmd, 4FAX# 4825) Recovery From rm * From the Root (/) Directory 4