10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I am learning SED and just following the shell scripting book, i have trouble understanding the grep and sed statement,
Question : 1
__________
/opt/oracle/work/antony>cat teledir.txt
jai sharma 25853670
chanchal singhvi 9831545629
anil aggarwal 9830263298
shyam saksena 23217847
lalit... (7 Replies)
Discussion started by: Antony Ankrose
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2. AIX
I am trying to comment out the crontab entries using sed.
I want to comment it out for a particular environment say '/mypath/scripts/'.
Using the full path as pattern, it is working. but using variable it is not working. i have tried double quotes too. but no luck!
$ crontab -l
... (3 Replies)
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3. Shell Programming and Scripting
Hi,
I am running a script sample.sh in bash environment .In the script i am using sed and awk commands which when executed individually from terminal they are getting executed normally but when i give these sed and awk commands in the script it is giving the below errors :-
./sample.sh: line... (12 Replies)
Discussion started by: satishmallidi
12 Replies
4. UNIX for Dummies Questions & Answers
I am trying to create a crontab but I keep getting a "bad minute" error.
Here is what I am entering:
*/5****/usr/bin/php/ {path to script}
After I exit the editor and save I get the following message:
crontab: installing new crontab
"/temp/crontab." :-2: bad minute
errors in... (2 Replies)
Discussion started by: fcocnews
2 Replies
5. Shell Programming and Scripting
I have a requirement where I want to add a comment '#' in my crontab, run a process, than remove the '#' I added.
Example cron
#5,10 * * * * ls -lt /tmp
10,5 * * * * ls -lt /var
I would like to be able use sed or awk to add a '#' at the begining of each
line. After the command... (4 Replies)
Discussion started by: BeefStu
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6. Shell Programming and Scripting
Hi,
I want to modifiy the hour in the crontab AIX 5.3 for this line:
Input:
00 22 * * * /outillage/script_exploit/bin/SavOffline.ksh > /dev/null 2>&1
Output:
30 20 * * * /outillage/script_exploit/bin/SavOffline.ksh > /dev/null 2>&1
With the awk or sed function through a ssh -q... (1 Reply)
Discussion started by: khalidou13
1 Replies
7. UNIX for Dummies Questions & Answers
I'm not sure if the problem I'm seeing is an artifact of sed or simply a beginner's mistake. Here's the problem: I want to add a zero-width space following each underscore between XML tags. For example, if I had the following xml:
<MY_BIG_TAG>This_is_a_test</MY_BIG_TAG>
It should look like... (8 Replies)
Discussion started by: rhetoric101
8 Replies
8. Shell Programming and Scripting
Hi all,
First off, Thank you all for the knowledge I have gleaned from this site!
Deleting Records from a text file... sed paragraphs
The following code works nearly perfect, however each time it is run on the log file it adds a newline at the head of the file, run it 5 times, it'll have 5... (1 Reply)
Discussion started by: Festus Hagen
1 Replies
9. Shell Programming and Scripting
Hello and thx for reading this
I'm using sed to remove only the leading spaces in a file
bash-280R# cat foofile
some text
some text
some text
some text
some text
bash-280R#
bash-280R# sed 's/^ *//' foofile > foofile.use
bash-280R# cat foofile.use
some text
some text
some text... (6 Replies)
Discussion started by: laser
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10. Shell Programming and Scripting
Execution of the following segment is giving the error -
Script extract:-
OUT=$DATADIR/sol_rsult_orphn.bcp
TMP1=${OUT}_tmp1
TMP=${OUT}_tmp
( isql -w 400 $dbConnect_OPR <<EOF
select convert(char(10), s.lead_id)
+'|'
+ s.pho_loc_type,
";",
s.sol_rsult_cmnt,
";",
+'|'+ s.del_ind... (3 Replies)
Discussion started by: kzmatam
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CRONTAB(1) General Commands Manual CRONTAB(1)
NAME
crontab - maintain crontab files for individual users (Vixie Cron)
SYNOPSIS
crontab [ -u user ] file
crontab [ -u user ] [ -i ] { -e | -l | -r }
DESCRIPTION
crontab is the program used to install, deinstall or list the tables used to drive the cron(8) daemon in Vixie Cron. Each user can have
their own crontab, and though these are files in /var/spool/cron/crontabs, they are not intended to be edited directly.
If the /etc/cron.allow file exists, then you must be listed (one user per line) therein in order to be allowed to use this command. If the
/etc/cron.allow file does not exist but the /etc/cron.deny file does exist, then you must not be listed in the /etc/cron.deny file in order
to use this command.
If neither of these files exists, then depending on site-dependent configuration parameters, only the super user will be allowed to use
this command, or all users will be able to use this command.
If both files exist then /etc/cron.allow takes precedence. Which means that /etc/cron.deny is not considered and your user must be listed
in /etc/cron.allow in order to be able to use the crontab.
Regardless of the existance of any of these files, the root administrative user is always allowed to setup a crontab. For standard Debian
systems, all users may use this command.
If the -u option is given, it specifies the name of the user whose crontab is to be used (when listing) or modified (when editing). If this
option is not given, crontab examines "your" crontab, i.e., the crontab of the person executing the command. Note that su(8) can confuse
crontab and that if you are running inside of su(8) you should always use the -u option for safety's sake.
The first form of this command is used to install a new crontab from some named file or standard input if the pseudo-filename ``-'' is
given.
The -l option causes the current crontab to be displayed on standard output. See the note under DEBIAN SPECIFIC below.
The -r option causes the current crontab to be removed.
The -e option is used to edit the current crontab using the editor specified by the VISUAL or EDITOR environment variables. After you exit
from the editor, the modified crontab will be installed automatically. If neither of the environment variables is defined, then the default
editor /usr/bin/editor is used.
The -i option modifies the -r option to prompt the user for a 'y/Y' response before actually removing the crontab.
DEBIAN SPECIFIC
The "out-of-the-box" behaviour for crontab -l is to display the three line "DO NOT EDIT THIS FILE" header that is placed at the beginning
of the crontab when it is installed. The problem is that it makes the sequence
crontab -l | crontab -
non-idempotent -- you keep adding copies of the header. This causes pain to scripts that use sed to edit a crontab. Therefore, the default
behaviour of the -l option has been changed to not output such header. You may obtain the original behaviour by setting the environment
variable CRONTAB_NOHEADER to 'N', which will cause the crontab -l command to emit the extraneous header.
SEE ALSO
crontab(5), cron(8)
FILES
/etc/cron.allow
/etc/cron.deny
/var/spool/cron/crontabs
There is one file for each user's crontab under the /var/spool/cron/crontabs directory. Users are not allowed to edit the files under that
directory directly to ensure that only users allowed by the system to run periodic tasks can add them, and only syntactically correct
crontabs will be written there. This is enforced by having the directory writable only by the crontab group and configuring crontab com-
mand with the setgid bid set for that specific group.
STANDARDS
The crontab command conforms to IEEE Std1003.2-1992 (``POSIX''). This new command syntax differs from previous versions of Vixie Cron, as
well as from the classic SVR3 syntax.
DIAGNOSTICS
A fairly informative usage message appears if you run it with a bad command line.
cron requires that each entry in a crontab end in a newline character. If the last entry in a crontab is missing the newline, cron will
consider the crontab (at least partially) broken and refuse to install it.
AUTHOR
Paul Vixie <paul@vix.com> is the author of cron and original creator of this manual page. This page has also been modified for Debian by
Steve Greenland, Javier Fernandez-Sanguino and Christian Kastner.
4th Berkeley Distribution 19 April 2010 CRONTAB(1)