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Operating Systems
Linux
Ubuntu
Kernel boot options removed by fault, no boot options
Post 302530020 by cdt on Sunday 12th of June 2011 08:23:35 AM
06-12-2011
[SOLVED] Kernel boot options removed by fault, no boot options
Hello Everyone,
First of all, I highly appreciate all Linux forum members and whole Linux community.
. I wish you the best for all of you !
I will try to be short and concise: I am using Linux Mint 10 for 2 months on 2 ws, and all went good so far (Vbox, developing, Unix scripting, etc); I am not a very beginner in UNIX, having some skills in PHP/MYSQL/APACHE/BASH/LINUX - WIN/BATCH as well (several years, let's say).
But what is happening now,
is putting me into a trouble: yesterday I have performed some wifi kernel modules installation with Synaptic and some new kernel were added to boot menu, some of them with --recovery option, some of them new ones. Uninstalling these last wifi modules (and probably another ones), all kernel modules (including the current (and good) one were uninstalled, of course, they disappeared from the boot menu as well).
I agree that was totally my fault because I have installed wifi modules which have required kernel recompiling, but I dd not know then the full image of this disaster.
In the last open session (just before reboot), I have seen that all kernel images/module disapperared from /root folder, /vmlinuz file disappeared too; of course using GUI boot loader, I have observed only 2 Memory test options and the M$Win OS (the second OS installed).
My issue now is: I would like to repair the previous Mint 10 installation, no to reinstall because it is taking some time to reparameter all settings .. if it is possible.
CURRENT STATUS:
> I have a Linux Mint 10 burned disk (this one where I typing these lines);
> wired/wireless network on;
> all partitions are not changed
> Linux Mint boot menu has only 2 Mem test option + 1 M$Win OS boot option
> Old Linux kernel definitions is missing from boot menu as well as from:
/root folder
in the / [root] there is no any vmlinuz binaries (I don't remember the correct name for the vmlinuz ..)
> I am able to burn any CD/DVD's, download any binaries/apps from the internet and so on.
> I am online now, ready to give you all details you need about my steps performed yesterday (as much as I remember ;(( -- poor of me ...)
QUESTIONS FOR YOU:
> I would like to avoid the full reinstallation in order to keep the old and full Linux Mint 10 destop;
> I would like to repair the linux kernel, putting it in the right place (/root, /) and create again the records in boot menu, in order to boot again LM10 as it was until yesterday evening.
> Hoping that this problem could have a solution, would you be kind to advise me a good procedure to peform (to install) as this kernel changes to do not happen again in the future.
Hoping that someone of you has encountered this before, I am here to follow your instructions. If the name of this topic could be redefined (in order to reflect this issue better), please do so or suggest me to do, I have not used so much the discussion forums until now, but I will do from now on
...
All the best for you.
Cristian
First of all, I highly appreciate all Linux forum members and whole Linux community.
. I wish you the best for all of you !I will try to be short and concise: I am using Linux Mint 10 for 2 months on 2 ws, and all went good so far (Vbox, developing, Unix scripting, etc); I am not a very beginner in UNIX, having some skills in PHP/MYSQL/APACHE/BASH/LINUX - WIN/BATCH as well (several years, let's say).
But what is happening now,
is putting me into a trouble: yesterday I have performed some wifi kernel modules installation with Synaptic and some new kernel were added to boot menu, some of them with --recovery option, some of them new ones. Uninstalling these last wifi modules (and probably another ones), all kernel modules (including the current (and good) one were uninstalled, of course, they disappeared from the boot menu as well).I agree that was totally my fault because I have installed wifi modules which have required kernel recompiling, but I dd not know then the full image of this disaster.
In the last open session (just before reboot), I have seen that all kernel images/module disapperared from /root folder, /vmlinuz file disappeared too; of course using GUI boot loader, I have observed only 2 Memory test options and the M$Win OS (the second OS installed).
My issue now is: I would like to repair the previous Mint 10 installation, no to reinstall because it is taking some time to reparameter all settings .. if it is possible.
CURRENT STATUS:
> I have a Linux Mint 10 burned disk (this one where I typing these lines);
> wired/wireless network on;
> all partitions are not changed
> Linux Mint boot menu has only 2 Mem test option + 1 M$Win OS boot option
> Old Linux kernel definitions is missing from boot menu as well as from:
/root folder
in the / [root] there is no any vmlinuz binaries (I don't remember the correct name for the vmlinuz ..)
> I am able to burn any CD/DVD's, download any binaries/apps from the internet and so on.
> I am online now, ready to give you all details you need about my steps performed yesterday (as much as I remember ;(( -- poor of me ...)
QUESTIONS FOR YOU:
> I would like to avoid the full reinstallation in order to keep the old and full Linux Mint 10 destop;
> I would like to repair the linux kernel, putting it in the right place (/root, /) and create again the records in boot menu, in order to boot again LM10 as it was until yesterday evening.
> Hoping that this problem could have a solution, would you be kind to advise me a good procedure to peform (to install) as this kernel changes to do not happen again in the future.
Hoping that someone of you has encountered this before, I am here to follow your instructions. If the name of this topic could be redefined (in order to reflect this issue better), please do so or suggest me to do, I have not used so much the discussion forums until now, but I will do from now on
... All the best for you.
Cristian
Last edited by cdt; 09-09-2011 at 01:33 AM..
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LEARN ABOUT CENTOS
sysinfo
SYSINFO(2) Linux Programmer's Manual SYSINFO(2) NAME
sysinfo - returns information on overall system statistics SYNOPSIS
#include <sys/sysinfo.h> int sysinfo(struct sysinfo *info); DESCRIPTION
Until Linux 2.3.16, sysinfo() used to return information in the following structure: struct sysinfo { long uptime; /* Seconds since boot */ unsigned long loads[3]; /* 1, 5, and 15 minute load averages */ unsigned long totalram; /* Total usable main memory size */ unsigned long freeram; /* Available memory size */ unsigned long sharedram; /* Amount of shared memory */ unsigned long bufferram; /* Memory used by buffers */ unsigned long totalswap; /* Total swap space size */ unsigned long freeswap; /* swap space still available */ unsigned short procs; /* Number of current processes */ char _f[22]; /* Pads structure to 64 bytes */ }; and the sizes were given in bytes. Since Linux 2.3.23 (i386), 2.3.48 (all architectures) the structure is: struct sysinfo { long uptime; /* Seconds since boot */ unsigned long loads[3]; /* 1, 5, and 15 minute load averages */ unsigned long totalram; /* Total usable main memory size */ unsigned long freeram; /* Available memory size */ unsigned long sharedram; /* Amount of shared memory */ unsigned long bufferram; /* Memory used by buffers */ unsigned long totalswap; /* Total swap space size */ unsigned long freeswap; /* swap space still available */ unsigned short procs; /* Number of current processes */ unsigned long totalhigh; /* Total high memory size */ unsigned long freehigh; /* Available high memory size */ unsigned int mem_unit; /* Memory unit size in bytes */ char _f[20-2*sizeof(long)-sizeof(int)]; /* Padding to 64 bytes */ }; and the sizes are given as multiples of mem_unit bytes. sysinfo() provides a simple way of getting overall system statistics. This is more portable than reading /dev/kmem. RETURN VALUE
On success, zero is returned. On error, -1 is returned, and errno is set appropriately. ERRORS
EFAULT pointer to struct sysinfo is invalid CONFORMING TO
This function is Linux-specific, and should not be used in programs intended to be portable. The Linux kernel has a sysinfo() system call since 0.98.pl6. Linux libc contains a sysinfo() routine since 5.3.5, and glibc has one since 1.90. SEE ALSO
proc(5) COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 2012-05-05 SYSINFO(2)