09-25-2008
The file is being updated continuously, so that might not be the right solution as data should not be lost in moving to a temp file and renaming it.
sed -i, should probably do what you are looking for.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Is there an option, for cat, head, tail, or is there any way, to display a file from last line to first? For example, my file
looks like this:
aaaa
bbbb
cccc
eeee
and I would like to print or display it like this:
eeee
cccc
bbbb
aaaa
thanks (5 Replies)
Discussion started by: jpprial
5 Replies
2. Shell Programming and Scripting
Hi,
Fairly new to unix scripting, hoping to get some help.
using AIX v5
Basically I have 3 files 1). Header record 2). many detail record 3). Trailer record
My desired result is 1 file which contains Heaeder, Detail, Trailer
Currenty I am using a series of:
... (8 Replies)
Discussion started by: CBZ
8 Replies
3. UNIX for Dummies Questions & Answers
Hi,
I am using ">>" to append to the existing file but I appens to the end of the file but I want to add tne new things at the beginning. Do we have any functionality to do that?
Thanks,
Siba (1 Reply)
Discussion started by: siba.s.nayak
1 Replies
4. Linux
How would I do that?
/Rutger (6 Replies)
Discussion started by: rutgerblom
6 Replies
5. UNIX for Dummies Questions & Answers
Hello,
I have 50 text files in a directory called "AllFiles"
I want to make a program that will go inside of the "AllFiles" Directory and count the number of lines in each individual text file. Then, the program will calculate how many more lines there are over 400 in each text file and... (7 Replies)
Discussion started by: motoxeryz125
7 Replies
6. Shell Programming and Scripting
I am writing a code to append some numbers in the beginning of each line in all the files present in a directory. The number of files are really huge. The files are numbered as 1.sco, 2.sco, 4.sco (Note: 3.sco is missing).
The files currently look like this:
1.sco
2 3
5 6
6 7My task is to... (4 Replies)
Discussion started by: shoaibjameel123
4 Replies
7. Shell Programming and Scripting
I want to append file names at the beginning of a line for each row
file content
abc.txt.gz 123|654|987
bcd.txt.gz 876|trf|kjh
I want a single output file with below format
abc.txt.gz|123|654|987
bcd.txt.gz|876|trf|kjh
This one is working but only with unzip files,need to have... (3 Replies)
Discussion started by: rakesh5300
3 Replies
8. Shell Programming and Scripting
Hi,
I have multiple files having many lines like as bvelow:
file Name a.txt
abc def
def xyz
123 5678
file Name b.txt
abc def
def xyz
123 5678
I would like to append files in the below format to a new file:
file Name c.txt (7 Replies)
Discussion started by: rramkrishnas
7 Replies
9. Shell Programming and Scripting
Hi Guys,
IF i have to append data to a variable, i simply use the following. What can i do to append data to the beginning?
VAR+="data" (6 Replies)
Discussion started by: srkmish
6 Replies
10. Shell Programming and Scripting
Hi,
I now that >> will append text to the end of the text that is already inside the file.
How to append the new text infront of the text that is already in the file.
Thanks for any input.
Regards,
Chandu (3 Replies)
Discussion started by: chandrakanth
3 Replies
AT(1) General Commands Manual AT(1)
NAME
at - execute commands at a later time
SYNOPSIS
at time [ day ] [ file ]
DESCRIPTION
At squirrels away a copy of the named file (standard input default) to be used as input to sh(1) at a specified later time. A cd(1) com-
mand to the current directory is inserted at the beginning, followed by assignments to all environment variables. When the script is run,
it uses the user and group ID of the creator of the copy file.
The time is 1 to 4 digits, with an optional following `A', `P', `N' or `M' for AM, PM, noon or midnight. One and two digit numbers are
taken to be hours, three and four digits to be hours and minutes. If no letters follow the digits, a 24 hour clock time is understood.
The optional day is either (1) a month name followed by a day number, or (2) a day of the week; if the word `week' follows invocation is
moved seven days further off. Names of months and days may be recognizably truncated. Examples of legitimate commands are
at 8am jan 24
at 1530 fr week
At programs are executed by periodic execution of the command /usr/lib/atrun from cron(8). The granularity of at depends upon how often
atrun is executed.
Standard output or error output is lost unless redirected.
FILES
/usr/spool/at/yy.ddd.hhhh.uu
activity to be performed at hour hhhh of year day ddd of year yy. uu is a unique number.
/usr/spool/at/lasttimedone contains hhhh for last hour of activity.
/usr/spool/at/past directory of activities now in progress
/usr/lib/atrun program that executes activities that are due
pwd(1)
SEE ALSO
calendar(1), cron(8)
DIAGNOSTICS
Complains about various syntax errors and times out of range.
BUGS
Due to the granularity of the execution of /usr/lib/atrun, there may be bugs in scheduling things almost exactly 24 hours into the future.
AT(1)