also I want to know how useful is Crontab for these kinds of work. , or can I make Crontab run when both machines are on at a particular point of time in the day / week ?
crontab is obviously very useful, with two reservations.
Obviously, if the one of the machines is down, cron will not run. You could set up some mechanism to compensate for that (write a timestamp file, and check the file was created), but it would be a bother.
You could make the two machines run a job at the same time, but you would have to make sure the clocks are exactly the same. It's probably better to let one of them do it's think first, and then an hour or whatever later, let the other one. Or might be some way to do everything on one machine, and it runs a remote process on the other.
I want to take daily backup(11pm) of /var/www to /mnt/bak excluding /var/www/videos and /var/www/old. HOW to implement a rotating snapshot method, so that i can have multiple(say 4) automatically rotating backups. (0 Replies)
hello,
i need to modified my synch/back scripts....
i want that this script only syncro folders in destinationfolder.
f.e. when in destination are two folders
1) admin
2) users
but in SOURCE are three:
1) admin
2) users
3) antivirus
the script should only increnmential sync the... (0 Replies)
I've got a new MythTV box at home and figured it would be a great opportunity to use it to do daily mirrors of my mysqlbackup directory (let's say /mysqlbackup/backups) and my website at /usr/local/apache/htdocs and below.
I figured it would be a best practice NOT to use a root login but to... (0 Replies)
How do i use Rsync yo pickup only new or modified files from source?
I am using rsync -ravzpotu --delete-excluded but sometimes it goes thru all files again (5 Replies)
I'm using this script to backup an external hdd to another external hdd -
rsync -aE --delete --exclude Volumes/Disk\ A/.Trashes "/Volumes/Disk A" "/Volumes/Disk A Backup"The source drive being "Disk A", and the drive I wish to backup to being "Disk A Backup".
I'm constantly getting this error,... (4 Replies)
Hi Everyone,
we are running rsync with --backup mode, Are there any rsync options to remove backup folders on successful deployment?
Thanks in adv. (0 Replies)
Hello everybody
I'm triing since few days to do this. So sorry if my question looks stupide, but i've tried.
I have to get picture from a folder (who is updated automaticly and with subfolder) with theirs extensions (i'm ok on that) and this files have to me copied in a folder where a website... (7 Replies)
Hi,
I am trying to use rsync utility through ssh to synchronize some root files of 2 servers.
I have a rsyncusr user in each server. I configured ssh with no password. I set NOPASSWD in the /etc/sudoers file:
rsyncusr ALL= NOPASSWD:/usr/bin/rsync
In order to make rsync able to sudo and be... (2 Replies)
Hello All,
I am looking at a fast way to script some backups. I am looking at using rsync to do the leg work. I am having a hard time conceiving a script though.
I have a tree with subfolders within subfolders. I was looking at the /xd option to parse the tree.
Directory of k:\
... (4 Replies)
Discussion started by: jvamos
4 Replies
LEARN ABOUT OSF1
cron
cron(8) System Manager's Manual cron(8)NAME
cron - The system clock daemon
SYNOPSIS
/usr/sbin/cron
DESCRIPTION
The cron daemon runs shell commands at specified dates and times. Commands that are to run according to a regular or periodic schedule are
found within the crontab files. Commands that are to run once only are found within the at files. You submit crontab and at file entries
by using the crontab and at commands. Because the cron process exits only when killed or when the system stops, only one cron daemon
should exist on the system at any given time. Normally, you start the cron daemon from within a run command file.
During process initialization and when cron detects a change, it examines the crontab and at files. This strategy reduces the overhead of
checking for new or changed files at regularly scheduled intervals. The cron command creates a log of its activities. The cron daemon
must be started from the system startup scripts because it must begin execution without a login user ID set. The cron daemon starts each
job with the following process attributes stored with the job by the invoking process: Login user ID Effective and real user IDs Effective
and real group IDs Supplementary groups
It also establishes the following attributes from the authentication profile of the account associated with the login user ID of the invok-
ing process: Audit control and disposition masks Kernel authorizations
DIAGNOSTICS
The at and batch programs will refuse to accept jobs submitted from processes whose login user ID is different from the real user ID.
FILES
Specifies the command path. Main cron directory Directory containing the crontab files. List of allowed users. List of denied users His-
tory information for cron Queue description file for at, batch, and cron
RELATED INFORMATION
Commands: at(1), crontab(1), rc0(8), rc2(8), rc3(8)
Files: queuedefs(4) delim off
cron(8)