I wasn't sure if I should post it here of in the Shell Script category, but I figured it was definitely a newbie question.
I'm trying to write a script that will check for the existence of a specific file (or for any files within the directory) and then take specific actions. I've removed all... (2 Replies)
Hey all,
I have total new with shell scripting so I don't know if what I need to do even possible, here it is...for a duration of time (say...1 hour) I need to check for the existence of a particular file, if it exists then I will invoke a java program or I will continue to check until a)... (2 Replies)
Hi,
My requirement was to check the existence of a file having a specified pattern.The way i tried to achieve this was
if ; then
echo "File found"
fi
an example file having this pattern was 'ilvs_trace01.0124'.
it will vary... (3 Replies)
Hello
I am having a requirement like if there is no file in the directory then i need a message to pop on after the execution of the script.
My script basically does for File in `ls -t $DIRECTORY | tail -1`;
if there is no file the DIRECTORY then the script is simply exiting with out... (2 Replies)
I have requirement where i need to search for files which start with SALESORDER and PURCHASEORDER. i need to process the files with SALESORDER first and then PURCHASEORDER. If SALESORDER files are not there i dont want to process PURCHASEORDER and i want to come out of script. I have written a code... (4 Replies)
count=0;
while read line;
do ] && let count=count+1; done < file_name.txt
echo
echo "$count of 10 files found "
echo
The scenario is a follows :
I have a file which contains a list of filenames present in particular directory .
I am checking fo the existence of the file and... (5 Replies)
Hi
I need to parse the file of same name which exist on different servers and calculate the count of string existed in both files.
Say a file abc.log exist on 2 servers.
I want to search for string "test" on both files and calculate the total count of search string's existence.
For... (6 Replies)
Hi
I'm using the below command in shell script to check for file exists in the path
if
.....
fi
path and test are variables
path and the file exists but the commands inside if condition is executed (! operator used)
Is the above way of checking for file existence is correct?
... (4 Replies)
Hi,
I am looking for a shell script with the following.
1. It should check whether a particular file exists in a location
#!/bin/sh
if ;
then
echo "xxx.txt File Exists"
else
echo "File Not Found"
fi
2. If file exists, it should check for the modified date and run a command... (2 Replies)
Hope someone can help me on this
In a directory ,files are dynamically generated.I need a script to do the following
if files are not received for more than 2 hours or if the received file is empty
then do something
How can I put that in a script.Thank you
eg. in cd /dir_name the... (13 Replies)
Discussion started by: haadiya
13 Replies
LEARN ABOUT DEBIAN
plan9-tail
TAIL(1) General Commands Manual TAIL(1)NAME
tail - deliver the last part of a file
SYNOPSIS
tail [ +-number[lbc][rf] ] [ file ]
tail [ -fr ] [ -n nlines ] [ -c nbytes ] [ file ]
DESCRIPTION
Tail copies the named file to the standard output beginning at a designated place. If no file is named, the standard input is copied.
Copying begins at position +number measured from the beginning, or -number from the end of the input. Number is counted in lines, 1K
blocks or bytes, according to the appended flag or Default is -10l (ten ell).
The further flag causes tail to print lines from the end of the file in reverse order; (follow) causes tail, after printing to the end, to
keep watch and print further data as it appears.
The second syntax is that promulgated by POSIX, where the numbers rather than the options are signed.
EXAMPLES
tail file
Print the last 10 lines of a file.
tail +0f file
Print a file, and continue to watch data accumulate as it grows.
sed 10q file
Print the first 10 lines of a file.
SOURCE
/src/cmd/tail.c
BUGS
Tails relative to the end of the file are treasured up in a buffer, and thus are limited in length.
According to custom, option +number counts lines from 1, and counts blocks and bytes from 0.
Tail is ignorant of UTF.
TAIL(1)