06-02-2009
grub: setting a default OS?
I have a dual-boot system (just testing it out, really -- 32-bit Xubuntu 8.10 and 64-bit Ubuntu 9.04) and I'd like to set the computer to boot to the second OS unless I tell it otherwise. Is there a way to do that?
9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
What is the command to set default PASSLENGTH and the MAXWEEKS for all the passwords. I don't want to edit the /etc/default/passwd file either. And I am using Linux RedHat7.1 system.
If anyone knows, please help me out here.
Regards.
-Iftikhar (1 Reply)
Discussion started by: syedifti
1 Replies
2. UNIX for Dummies Questions & Answers
Hi,
I am setting up an area on a unix server where multiple people will be editing web pages. Can anyone tell me how to set it up the directory and subdirectories so that when a user creates a new file, it defaults to permissions of 664 or 775?
I've tried using umask but from what I can... (1 Reply)
Discussion started by: robbieg
1 Replies
3. UNIX for Dummies Questions & Answers
Hi, I installed solaris 10 a few weeks ago. It was working fine during the past two weeks. However, now when I start to load to the drive, I get this problem:
The BIOS screen comes up like normal, then screen goes blank and a message "Grub loading stage 2" flashes real quick then the computer... (1 Reply)
Discussion started by: moesays
1 Replies
4. AIX
Does anyone know how to set PP (Physical Partition) size on rootvg when installing AIX OS from scratch (via CD or NIM installation)? (7 Replies)
Discussion started by: pdtak
7 Replies
5. Red Hat
Hi,
Can we specify which grub.conf to use while installing grub on RHEL.
We are working on application which requires different grub configurations needed, depending on certain criteria we need to update grub with correct grub.conf.
Can we use grub-install for this purpose? (4 Replies)
Discussion started by: successlin
4 Replies
6. Solaris
Can anyone kindly explain to me the meaning of the default values of the code below please?
Thank you very much
#MINDIFF=3
#MINALPHA=2
#MINNONALPHA=1
#MINUPPER=0
#MINLOWER=0
#MAXREPEATS=0
#MINSPECIAL=0
#MINDIGIT=0
#WHITESPACE=YES (1 Reply)
Discussion started by: cjashu
1 Replies
7. UNIX for Dummies Questions & Answers
This is a very newbie's question:
I was trying to add a new version of the same command "blastn", but the old command always shows up first.
which blastn
/usr/local/bin/blastnThe two versions of the same command "blastn" are located in:
which -a blastn
/usr/local/bin/blastn... (5 Replies)
Discussion started by: yifangt
5 Replies
8. UNIX for Dummies Questions & Answers
can someone please explain me the difference between these two files:
"/boot/grub/grub.conf" and "/etc/grub.conf" .. (7 Replies)
Discussion started by: stunn3r
7 Replies
9. Solaris
Trying to figure out the best method of security for oracle user accounts. In Solaris 10 they are set as regular users but have nologin set forcing the dev's to login as themselves and then su to the oracle users.
In Solaris11 we have the option of making it a role because RBAC is enabled but... (1 Reply)
Discussion started by: os2mac
1 Replies
LEARN ABOUT CENTOS
sd_journal_get_cutoff_realtime_usec
SD_JOURNAL_GET_CUTOFF_REALTIME_USEC(3) sd_journal_get_cutoff_realtime_usec SD_JOURNAL_GET_CUTOFF_REALTIME_USEC(3)
NAME
sd_journal_get_cutoff_realtime_usec, sd_journal_get_cutoff_monotonic_usec - Read cut-off timestamps from the current journal entry
SYNOPSIS
#include <systemd/sd-journal.h>
int sd_journal_get_cutoff_realtime_usec(sd_journal* j, uint64_t* from, uint64_t* to);
int sd_journal_get_cutoff_monotonic_usec(sd_journal* j, sd_id128_t boot_id, uint64_t* from, uint64_t* to);
DESCRIPTION
sd_journal_get_cutoff_realtime_usec() gets the realtime (wallclock) timestamps of the first and last entries accessible in the journal. It
takes three arguments: the journal context object and two pointers to 64-bit unsigned integers to store the timestamps in. The timestamps
are in microseconds since the epoch, i.e. CLOCK_REALTIME. Either one of the two timestamp arguments may be passed as NULL in case the
timestamp is not needed, but not both.
sd_journal_get_cutoff_monotonic_usec() gets the monotonic timestamps of the first and last entries accessible in the journal. It takes
three arguments: the journal context object, a 128-bit identifier for the boot, and two pointers to 64-bit unsigned integers to store the
timestamps. The timestamps are in microseconds since boot-up of the specific boot, i.e. CLOCK_MONOTONIC. Since the monotonic clock begins
new with every reboot it only defines a well-defined point in time when used together with an identifier identifying the boot, see
sd_id128_get_boot(3) for more information. The function will return the timestamps for the boot identified by the passed boot ID. Either
one of the two timestamp arguments may be passed as NULL in case the timestamp is not needed, but not both.
RETURN VALUE
sd_journal_get_cutoff_realtime_usec() and sd_journal_get_cutoff_monotonic_usec() return 1 on success, 0 if not suitable entries are in the
journal or a negative errno-style error code.
NOTES
The sd_journal_get_cutoff_realtime_usec() and sd_journal_get_cutoff_monotonic_usec() interfaces are available as a shared library, which
can be compiled and linked to with the libsystemd-journal pkg-config(1) file.
SEE ALSO
systemd(1), sd-journal(3), sd_journal_open(3), sd_journal_get_realtime_usec(3), sd_id128_get_boot(3), clock_gettime(2)
systemd 208 SD_JOURNAL_GET_CUTOFF_REALTIME_USEC(3)