History source of Computer Problem-Solution (Open) (No. 6)

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  • 38 (2014-10-14 (Tue) 17:07:51)
  • 39 (2014-10-17 (Fri) 14:16:07)
  • 40 (2015-08-06 (Thu) 15:02:09)
  • 41 (2016-03-10 (Thu) 11:11:59)

This is a page of "How to" solve some computer problems that may happen.

P = problem;
S = solution

#contents

** P: PEX (network boot) is now installing 2009.5.1 [#e8f71204]
*** S: finished. status [[PXE Server (Open)]] [#p74ace39]

** P: NIS (network information services) will be moved from tube to flex 2009.5.1 [#mb7aa695]
*** S: not yet finished. status [[Network Information System]] [#t46d19f5]

----
The following problems are solved.
----

** P: We move /etc/passwd then we can not be root. No more even shutdown. [#oaefbc51]
*** S: cntl-alt-del and reboot. Then when OS selection, push any arrow. [#v36584e8]
Then many selection of OS appears. Select one of OS, and press E.
Then select kernel and press E again. Then you can edit the command for starting  kernel and add "single" in the last of the command. Finally select "b" for booting and single user mode appears. Make /etc/passwd files and exit and runlevel 5 is recovers. 

Even if we used NIS, we should not delete /etc/passwd /etc/group and /etc/shadow.

** P: Flex was in a trouble today (2009.06.01). Problem was, we were failed to log-in to the flex. NIS is not running. Finally we solved it. See solution [#e62b9d19]
*** S: We found the graphics card is very unstable on Tube machine (172.17.4.134). May be accidentally we pull the card out and tube machine was failed to boot properly. As Flex uses NIS from Tube that is why we were unable to  log on to Flex. [#l1e69691]


** P: linux emacs ispell error (no language "eu") 2009.4.24 [#xf61128d]
*** S: solved. "M-x ispell-change-dictionary" and select english [#t33f8f93]
*** S: solved. Edit .emacs to add (setq ispell-dictionary "english") [#l1a50648]

** P: How to update the files of remote to the files of local [#lb59159d]
*** S: solved. "rsync -avc -e ssh saito@remote:/home/saito/book09/ /rsaito/book09"[#f25e1654]