Regarding the "system boot":
the wtmp file is certainly not in /var/tmp/ because that is world-writable and might cause security problems.
It is usually located in /var/log/ or /var/adm/
One can filter for the "reboot" records with
(Linux SuSE by default frequently rotates wtmp regardless of its size, so the last command is rendered almost useless.)
Further the last boot is stored in the utmp file. The who command does not print it; one needs
BTW on SysV-init-compatible systems the current run level is printed with
i have a script that uses an ant build.xml and its targets to pull a project from a cvs server, attempt to build the project, and then email me the results. When I run the script (either @ CLI or as a cron job) while I am logged in, everything works fine. However, if the script is set up to run... (5 Replies)
I have the following crontab entry to run a shell script for every 30 minutes of every day:
30 * * * * $HOME/main.sh > $HOME/main.log 2>$HOME/error.log
after I created the crontab file I have also done:
$crontab my_crontab
I also check to make sure it exists, by using the following... (11 Replies)
hi guys,
i have a problem.
a week ago i made a successful crontab that execute bash scripting daily, it worked well
but now, it doesn't work at all, in the mail i have:
"
/home/jimmy/cha/scripts/cekpderr
produced the following output:
lagi jalan
/home/jimmy/cha/scripts/cekpderr:... (6 Replies)
I have a script running in the crontab that gets data from a database every hour. Now I would like to execute a fortran routine to process the data in some way, after getting it and saving it locally.
I have added the following commands to my script:
set convert =... (1 Reply)
I wrote a script to shutdown the oracle database. The script works fine when I manually run the script. However, when i schedule a job, i get the following error.
Shutting Down cmismart ....................
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
SVR4... (6 Replies)
Hi all,
I really need your help ASAP on this. Below is the description of my problem and a sketch of Autosys
Job Activity Console
++++++++++++++++++++++++++++++++
File View Options
+++++++++++++++++++++++++++++++
Job Name Description Status Command Machine... (1 Reply)
The .profile file should be read when the user logs in. So, there should be no need to execute .profile file again in a cron job (since the cron job is run after the user logs in). Doesn't the cron require login from the user. Then, from where does the cron execute? Please help!! (1 Reply)
Hi,
I am trying to execute a script (for once) during the booting time in Ubuntu system. However, the result is only showing the strings without without the variables.
Here is the script:
MgrIp=$(ec2-describe-instances --filter tag:Name=Mgr --filter instance-state-name=running | egrep... (4 Replies)
Dear *nix users.
I'm on Mac OS 10.6 / Terminal and try to use crontab to schedule two scripts every 30 minutes and every 41 minutes.
I followed the man instructions and created / installed a crontab file for the current user:crontab -e
with the following content
*/30 * * * *... (4 Replies)
Dear All,
My server is running crontabs of 4 different users.
I want to develop a script that whenever a particular change occurs in a crontab , it is detected and the particular change is noted into a file.
Kindly let me know of suggestions on how it can be achieved.
My algo would be:
... (1 Reply)
Discussion started by: Junaid Subhani
1 Replies
LEARN ABOUT NETBSD
lastlog
UTMP(5) BSD File Formats Manual UTMP(5)NAME
utmp, wtmp, lastlog -- login records
SYNOPSIS
#include <utmp.h>
DESCRIPTION
The file <utmp.h> declares the structures used to record information about current users in the file utmp, logins and logouts in the file
wtmp, and last logins in the file lastlog. The time stamps of date changes, shutdowns and reboots are also logged in the wtmp file.
The wtmp file can grow rapidly on busy systems, and is normally rotated with newsyslog(8).
These files must be created manually; if they do not exist, they are not created automatically.
#define _PATH_UTMP "/var/run/utmp"
#define _PATH_WTMP "/var/log/wtmp"
#define _PATH_LASTLOG "/var/log/lastlog"
#define UT_NAMESIZE 8
#define UT_LINESIZE 8
#define UT_HOSTSIZE 16
struct lastlog {
time_t ll_time;
char ll_line[UT_LINESIZE];
char ll_host[UT_HOSTSIZE];
};
struct utmp {
char ut_line[UT_LINESIZE];
char ut_name[UT_NAMESIZE];
char ut_host[UT_HOSTSIZE];
time_t ut_time;
};
Each time a user logs in, the login(1) program looks up the user's UID in the file lastlog. If it is found, the timestamp of the last time
the user logged in, the terminal line and the hostname are written to the standard output, providing the login is not set quiet; see
login(1). The login(1) program then records the new login time in the file lastlog.
After the new lastlog record is written, the file utmp is opened and the utmp record for the user inserted. This record remains there until
the user logs out at which time it is deleted (by clearing the user and host fields, and updating the timestamp field). The utmp file is
used by the programs rwho(1), users(1), w(1), and who(1).
Next, the login(1) program opens the file wtmp, and appends the user's utmp record. When the user logs out, a utmp record with the tty line,
an updated time stamp, and cleared user and host fields is appended to the file by init(8). The wtmp file is used by the programs last(1)
and ac(8).
In the event of a date change, a shutdown or reboot, the following items are logged in the wtmp file.
reboot
shutdown A system reboot or shutdown has been initiated. The character '~' is placed in the field ut_line, and reboot or shutdown in the
field ut_name (see shutdown(8) and reboot(8)).
date The system time has been manually or automatically updated by date(1). The command name date is recorded in the field ut_name.
In the field ut_line, the character '|' indicates the time prior to the change, and the character '{' indicates the new time.
FILES
/var/run/utmp The utmp file.
/var/log/wtmp The wtmp file.
/var/log/lastlog The lastlog file.
SEE ALSO last(1), login(1), w(1), who(1), utmpx(5), ac(8), init(8), lastlogin(8), newsyslog(8)HISTORY
A utmp and wtmp file format appeared in Version 6 AT&T UNIX. The lastlog file format appeared in 3.0BSD.
BSD May 14, 2003 BSD