Manual fsck help in fedora Post: 302860647

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Top Forums UNIX for Advanced & Expert Users Manual fsck help in fedora Post 302860647 by Smiling Dragon on Sunday 6th of October 2013 11:41:14 PM

10-07-2013

Registered User

Quote:

Originally Posted by cokedude

Single user mode worked Smilie

Awesome

Quote:

Originally Posted by cokedude

Is there a difference between single user mode, pressing ctrl+alt+f2 and logging into root, or using sudo -i? I figured pressing ctrl+alt+f2 and logging into root, or using sudo -i would have the same effect as using single user mode.

Yeah, single user mode is, well, a mode with only one user Smilie

It's like a barebones boot with only the very basic stuff loaded to get the OS going. You can actually set more stuff to start up when you boot single-user but that's asking for trouble as the whole point of single-user mode is to be as basic as possible.

The main differences are:
* There's only the root user and only one user at a time, not multiuser at all (some OS's kind of cheat here though)
* Most filesystems don't mount, and most processes don't start, so it's easier to work on the filesystems without other stuff getting in the way.

You can exit single user mode by simply logging out (exit or ^d) and it should carry on up to multi-user. That said, I actually prefer to reboot round to multi-user instead but that may be me just being overly paranoid Smilie

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LEARN ABOUT XFREE86

sulogin

sulogin(1M)                                               System Administration Commands                                               sulogin(1M)

NAME

       sulogin - access single-user mode

SYNOPSIS

       sulogin

DESCRIPTION

       The  sulogin  utility  is  automatically invoked by init when the system is first started. It prompts the user to type the root password to
       enter system maintenance mode (single-user mode) or to type  EOF (typically <CTRL-D>) for normal startup (multi-user mode). The user should
       never directly invoke sulogin.

       The  sulogin utility can prompt the user to enter the root password on a variable number of serial console devices, in addition to the tra-
       ditional console device. See consadm(1M) and msglog(7D) for a description of how to configure a serial device to  display  the  single-user
       login prompt.

FILES

       /etc/default/sulogin    Default value can be set for the following flag:

                               PASSREQ         Determines if login requires a password. Default is PASSREQ=YES.

       /etc/default/login      Default value can be set for the following flag:

                               SLEEPTIME       If  present,  sets  the number of seconds to wait before login failure is printed to the screen and
                                               another login attempt is allowed. Default is 4 seconds. Minimum is 0 seconds. Maximum is 5 seconds.

                                               Both su(1M) and login(1) are affected by the value of SLEEPTIME.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsr                      |
       +-----------------------------+-----------------------------+

SEE ALSO

        login(1), consadm(1M), init(1M), su(1M), attributes(5), msglog(7D)

SunOS 5.10                                                          25 Sep 2002                                                        sulogin(1M)