i need to write script where I need to keep monitoring a files timestamp, if it changes, I need to run another abc.sh script.
I am thinking I can save file's current timestamp in another file or enviornment variable and after 10 min compare the files timestamp with the original timestamp. If... (1 Reply)
Hi all,
I am working on a script in which i need to get 4 hrs back time from the current time which i got from this perl function :
`perl -e 'print localtime(time() - 14400) . "\n"'`
now i need to get this in a loop and increment that time by 15 minutes
i.e
i=900(=15minutes)
`perl... (2 Replies)
I have a file named "suspected" with series of line like these :
{'protocol': 17, 'service': 'BitTorrent KRPC', 'server': '219.78.120.166', 'client_port': 52044, 'client': '10.64.68.44', 'server_port': 8291, 'time': 1226506312L, 'serverhostname': ''}
{'protocol': 17, 'service': 'BitTorrent... (3 Replies)
Hi, I wondered if we could do this with shell script?
How to compare the mtime of a file with the current time and check whether its less than 24 hours.
Thanks.:b: (2 Replies)
Hi,
I'm new to shell script programming, I only have Java programming background.
I'm writing a shell script to do file synchronization between 2 machines that located at different time zone area. Both machine were set its time zone according to its geographical location (Eg: server is at... (1 Reply)
I'm trying to compare 2 dates between current time and the timestamp on a file.
The date format is mmdd
Both return Apr 1 but when using if statement
line 11: Apr 1: command not found error is returned
#!/bin/sh
log="DateLog"
Current_Date=`date +%b%e`
Filepmdate=`ls -l /file.txt |... (1 Reply)
Hi Friends,
I'm a great fan of this forum... it has helped me tone my skills in shell scripting. I have a challenge here, which I'm sure you guys would help me in achieving...
File A has a list of job ids and I need to compare this with the File B (*.log) and File C (extend *.log) and copy... (6 Replies)
Hi Gurus,
I have some weird issue. when using
ls -l
the result shows different time format:
-rw-r--r-- 1 abc gourp1 3032605576 Jun 14 2013 abc
-rw-rw-r-- 1 abc gourp1 1689948832 Aug 10 06:22 abc
one display 2013 which is year; another one displays 06:22 which is time.
... (4 Replies)
Hi,
I have database table let say t_filenames which stores filenames and date_format in two columns.
e.g.
ABCD_TV_YYYYMMDD.txt YYYYMMDD
ABCD_MOUSE_YYYYMMDDHHMISS.txt YYYYMMDDHHMISS
Actual files are available in a directory (say /tmp), actual files are with... (2 Replies)
Hi All,
I have one file which contains time for request and response.
I want to calculate time difference in milliseconds for each line.
This file can contain 10K lines.
Sample file with 4 lines.
for first line.
Request Time: 15:23:45,255
Response Time: 15:23:45,258
Time diff... (6 Replies)
Discussion started by: Raza Ali
6 Replies
LEARN ABOUT BSD
expr
EXPR(1) General Commands Manual EXPR(1)NAME
expr - evaluate arguments as an expression
SYNOPSIS
expr arg ...
DESCRIPTION
The arguments are taken as an expression. After evaluation, the result is written on the standard output. Each token of the expression is
a separate argument.
The operators and keywords are listed below. The list is in order of increasing precedence, with equal precedence operators grouped.
expr | expr
yields the first expr if it is neither null nor `0', otherwise yields the second expr.
expr & expr
yields the first expr if neither expr is null or `0', otherwise yields `0'.
expr relop expr
where relop is one of < <= = != >= >, yields `1' if the indicated comparison is true, `0' if false. The comparison is numeric if
both expr are integers, otherwise lexicographic.
expr + expr
expr - expr
addition or subtraction of the arguments.
expr * expr
expr / expr
expr % expr
multiplication, division, or remainder of the arguments.
expr : expr
The matching operator compares the string first argument with the regular expression second argument; regular expression syntax is
the same as that of ed(1). The (...) pattern symbols can be used to select a portion of the first argument. Otherwise, the
matching operator yields the number of characters matched (`0' on failure).
( expr )
parentheses for grouping.
Examples:
To add 1 to the Shell variable a:
a=`expr $a + 1`
To find the filename part (least significant part) of the pathname stored in variable a, which may or may not contain `/':
expr $a : '.*/(.*)' '|' $a
Note the quoted Shell metacharacters.
SEE ALSO sh(1), test(1)DIAGNOSTICS
Expr returns the following exit codes:
0 if the expression is neither null nor `0',
1 if the expression is null or `0',
2 for invalid expressions.
7th Edition April 29, 1985 EXPR(1)