10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Ultimate goal is to delete lines from before and after a block of lines in a given file. First attempt was something like this:
sed -e '1,/STARTUP/ d' inputfile.txt > outputfile.txt
but that deleted everything down to and including the line with STARTUP. I need to delete everything before... (6 Replies)
Discussion started by: edstevens
6 Replies
2. Shell Programming and Scripting
if ! grep -q "aa" $line;then
if ! grep -q "bb" $line;then
somthing
fi
fi (2 Replies)
Discussion started by: yanglei_fage
2 Replies
3. Shell Programming and Scripting
How do you get the contents of a line directly after a selected one? Also, how about before it? I am using CSH and don't have any GNU products installed.
Input file:
apple
orange
plum
So say I use grep on orange...how do I get plum (this line can be different so I can't just grep... (4 Replies)
Discussion started by: thibodc
4 Replies
4. UNIX Desktop Questions & Answers
i have a line that has ",,", i need to change it to "," ; But i have it more than one time in the same line , sub(",,",",",$0) just sub the first one in the line?
---------- Post updated at 08:15 AM ---------- Previous update was at 08:15 AM ----------
using AWK please (2 Replies)
Discussion started by: Reham.Donia
2 Replies
5. Shell Programming and Scripting
hi! i researched about comparing two columns here and got an answer. but after examining my two files, i found out that the first columns of the two files are not unique with each other. all i want to compare is the 2nd and 3rd column.
FILE 1:
ABS 456 315
EBS 923 163
JYQ3 654 237
FILE 2:... (1 Reply)
Discussion started by: engr.jay
1 Replies
6. Shell Programming and Scripting
I want to delete a line between selected lines using sed:
e.g. : Between "bus" to "pins", delete lines conaining "signal" word.
Input :
bus
direction
signal new
signal old
pins
signal ok
end
Desired Output:
bus
direction
pins
signal
end (4 Replies)
Discussion started by: nehashine
4 Replies
7. Shell Programming and Scripting
Hello,
I want to change a line at file whit a script
i want to change line 150 for example, write hello and remove text of this line
EXAMPLE
LINE 150: my mother
change to:
LiNE 150: HELLO (4 Replies)
Discussion started by: uri_crack
4 Replies
8. Shell Programming and Scripting
I am trying to print 1st, 2nd, 13th and 14th fields of a file of line numbers from 29 to 10029. I dont know how to put this in one code. Currently I am removing the selected lines by
awk 'NR==29,NR==10029' File1 > File2
and then doing
awk '{print $1, $2, $13, $14}' File2 > File3
Can... (3 Replies)
Discussion started by: ananyob
3 Replies
9. Shell Programming and Scripting
Hello Experts,
I am working on a small file editing script. Since all experts here are very generous to give me the complete code, I would take up the problem in steps so that I ensure my opportunity to learn.
AIM: The script has some commented and some uncommented lines. I need to :
... (2 Replies)
Discussion started by: hkansal
2 Replies
10. Shell Programming and Scripting
Hi,
I'm struggling to write a script to do the following,
-will go through each line in the file
-in a specific character positions, changes
the value to a new value
-These character positions are fixed througout the file
-----------------------
e.g.: file1.sh will have the following 3... (4 Replies)
Discussion started by: vini99
4 Replies
CRONTAB(1) General Commands Manual CRONTAB(1)
NAME
crontab - maintain crontab files for individual users (V3)
SYNOPSIS
crontab [ -u user ] file
crontab [ -u user ] { -l | -r | -e }
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, they are not intended to be edited directly.
If the allow file exists, then you must be listed therein in order to be allowed to use this command. If the allow file does not exist but
the deny file does exist, then you must not be listed in the 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 the -u option is given, it specifies the name of the user whose crontab is to be tweaked. 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.
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.
SEE ALSO
crontab(5), cron(8)
FILES
/etc/cron.allow
/etc/cron.deny
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.
AUTHOR
Paul Vixie <paul@vix.com>
4th Berkeley Distribution 29 December 1993 CRONTAB(1)