A cronjob that runs every 6 mins would look like (V7 standard)
or
You should also consider some of these (should they be listed or not?):
Many systems still don't support / in the time fields (so check your cron and crontab man pages before worrying about /.
If your system supports / and one appears in the first field and the number after the / is less than 15, flag it.
Otherwise, if there is a - in the first field, flag it.
Otherwise, if there are one or more commas in the first field, sort the values separated by the commas and if the difference between any two adjacent values in the sorted list is less than 15, flag it. If the difference between the last value in the list and the (1st value in the list + 60) is less than 15, you have to determine if the hour field will ever yield consecutive hours. If it does, flag it. (Note that consecutive hours could also be hour 23 on one day and hour 0 on the next day, ... ... ...) Sorting the values in the minutes field is necessary because a minutes field of:
results in the job running every 10 minutes, but no two adjacent values are within 15 minutes of each other.
The logic isn't that hard, but there are enough special cases about which fields are considered depending on which fields have values specified in a crontab entry that this is not going to be a trivial task.
I am trying to use a line of output in an XML file as input in another new XML file for processing purposes via a shell script. Since I am a newbie though, I'm not sure how to do this since the data is different everytime. I am using this technique with static data right now:
echo -n "Running... (5 Replies)
Hi I need to parse the following data using shell script
Table
-----
stage4n_abc 48
stage4o_abcd 4
adashpg_abc_HeartBeat 1
stage4l_asc 168
Can anyone gimme the solution.
I want each value to get stored in an array or variable and want the value to be greped from another file.... (1 Reply)
Hi,
I am doing some data parsing for some economics research. I was recently exposed to shell script and am brand new to awk. I have a large csv file (like 10G) and I would like to make it a lot smaller with awk, but it is a bit tricky for me and I haven't been able to get it yet. I would... (5 Replies)
Hi all , I have a file with billing CDR records in it. I need to parse that information (row format) . The purpose is to compare full content. The example I have given below is a single line record but it has two portions, (1) the line start with “!” and end with “1.2.1.8” and (2) second part... (5 Replies)
Hello
I want to convert my cron list into a csv
Can you please help me with sed ?
eg:
Convert
#06,21,36,51 * * 1,2 * (. ~/.profile ; timex /some/path/script -30 -15) >> /some/path/logfile2 2>&1
* * * * * (. ~/.profile ; timex /some/path/script2) > /some/path/logfile2
To:... (1 Reply)
Hi friends,
I need to parse the following data in the given format and get the desired output. I need a function, which takes the input as a parameter and the desired output will be returned from the function.
INPUT(single parameter as complete string)
A;BCF;DFG;FD
... (3 Replies)
Hi,
I do have a data file which is divided into compartments by ---------. I would like to extract (parse) some of the data and numbers either using awk or sed
The file has the format:
CATGC
Best GO enrichment:
Genes/ORF that have the motifs (genes are sorted by max(pa+pd+po)):
... (6 Replies)
Experts ,
Below is the data:
--- Physical volumes ---
PV Name /dev/dsk/c1t2d0
VG Name /dev/vg00
PV Status available
Allocatable yes
VGDA 2
Cur LV 8
PE Size (Mbytes) 8
Total PE 4350
Free PE 2036
Allocated PE 2314
Stale PE 0
IO Timeout (Seconds) default
--- Physical volumes ---... (5 Replies)
Hi folks
I have a script I wrote that basically parses a bunch of config and xml files works out were to add in the new content then spits out the data into a new file.
It all works - apart from the xml and config file format in the new file
with XML files the original XML (that ends up in... (2 Replies)
Discussion started by: dfinch
2 Replies
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crontab
crontab(1) General Commands Manual crontab(1)NAME
crontab - user job file scheduler
SYNOPSIS
[file]
[username]
[username]
[username]
DESCRIPTION
The command manages a crontab file for the user. You can use a crontab file to schedule jobs that are executed automatically by (see
cron(1M)) on a regular basis. The command has four forms:
Create or replace your crontab file
by copying the specified file, or standard input if file is omitted or is specified as file, into the crontab
directory, The name of your crontab file in the crontab directory is the same as your effective user name.
If the compartmentalization feature is enabled, the crontab file is your effective user name followed by a
colon followed by the compartment id from which the crontab file is created.
Edit a copy of the user's crontab file, or create an empty file to
edit if the crontab file does not exist. When editing is complete, the file will be copied into the crontab
directory as the user's crontab file. If the compartmentalization feature is enabled, it only edits a copy
of the user's crontab file from the compartment that the crontab files were created from.
Lists the user's crontab file.
If the compartmentalization feature is enabled, it only lists the crontab files from the compartment that the
crontab files were created from.
Remove the user's crontab file from the crontab directory.
If the compartmentalization feature is enabled, it only removes the crontab files from the compartment that
the crontab files were created from.
Only a privileged user can use username following the or options, to edit, list, or remove the crontab file of the specified user.
The entries in a crontab file are lines of six fields each. The fields are separated by spaces or tabs. The lines have the following for-
mat:
minute hour monthday month weekday command
The first five are integer patterns that specify when the sixth field, command, should be executed. They can have the following ranges of
values:
minute The minute of the hour,
hour The hour of the day,
monthday The day of the month,
month The month of the year,
weekday The day of the week,
Each pattern can be either an asterisk meaning all legal values, or a list of elements separated by commas. An element is either a number
in the ranges shown above, or two numbers in the range separated by a hyphen (meaning an inclusive range). Note that the specification of
days can be made in two fields: monthday and weekday. If both are specified in an entry, they are cumulative. For example,
runs command at midnight on the first and fifteenth of each month, as well as every Monday. To specify days in only one field, set the
other field to asterisk For example,
runs command only on Mondays.
The sixth field, command (the balance of a line including blanks in a crontab file), is a string that is executed by the shell at the spec-
ified times. A percent character in this field (unless escaped by a backslash is translated to a newline character, dividing the field
into "lines". Only the first "line" (up to a or end-of-line) of the command field is executed by the shell. Any other "lines" are made
available to the command as standard input.
Blank lines and those whose first non-blank character is will be ignored.
invokes the command from the user's directory with the POSIX shell, It runs in the queue (see queuedefs(4)).
supplies a default environment for every shell, defining:
Users who desire to have their executed must explicitly do so in the crontab entry or in a script called by the entry.
You can execute if your name appears in the file If that file does not exist, you can use if your name does not appear in the file If only
exists and is empty, all users can use If neither file exists, only the user can use The files consist of one user name per line.
Security Restrictions
If the compartmentalization feature is enabled, and invoke the jobs from the compartment that the jobs were created from. Note that cre-
ates the job files in Hence, if the command is invoked from a compartment which has no write access to this directory and which disallows
the privilege, fails to schedule the jobs. See compartments(5) and privileges(5) for more information.
EXTERNAL INFLUENCES
Environment Variables
determines the interpretation of text within file as single and/or multibyte characters.
determines the language in which messages are displayed.
If or is not specified in the environment or is set to the empty string, the value of is used as a default for each unspecified or empty
variable. If is not specified or is set to the empty string, a default of "C" (see lang(5)) is used instead of
If any internationalization variable contains an invalid setting, behaves as if all internationalization variables are set to "C". See
environ(5). determines the editor to be invoked when option is specified. The default editor is vi.
International Code Set Support
Single-byte and multibyte character code sets are supported.
WARNINGS
Be sure to redirect the standard output and standard error from commands. If this is not done, any generated standard output or standard
error is mailed to the user.
FILES
Main cron directory
List of allowed users
List of denied users
Accounting information
Directory containing the crontab files
SEE ALSO sh(1), cron(1M), queuedefs(4), compartments(5), privileges(5).
STANDARDS CONFORMANCE crontab(1)