Hi!
Been working on a script and I've been having a problem. I've finally narrowed it down to this variable I'm setting:
servername=$(awk -v FS=\/ '{ print $7 } blah.txt | sed 's\/./-/g' | awk -v FS=\- '{print $1}')"
This will essentially pare down a line like this:
... (7 Replies)
So I am a newbie obviously but I need some help.
I am trying to run a script to check that the number of fields in a database is equal to 4, if not they should try again and run an appropriate database file. The fields are separated by a semi colon. I've tried a lot of things, this what I'm... (3 Replies)
This is the final first release of the dynamic menu generator for pekwm (WM).
#!/bin/bash
function param_val {
awk "/^${1}=/{gsub(/^${1}="'/,""); print; exit}' $2
}
echo "Dynamic {"
for CF in `ls -c1 /usr/share/applications/*.desktop`
do
name=$(param_val Name $CF)
... (3 Replies)
I would like to write a script to extend this command to a general case:
BEGIN {s_0=0;n_0=0}{n_0++;s_0+=($51-$1)^2}END {print sqrt(s_0/n_0)}
i.e. so that
BEGIN {s_0=0;n_0=0}{n_0++;s_0+=($51-$1)^2}END {print sqrt(s_0/n_0)}
BEGIN {s_1=0;n_1=0}{n_1++;s_1+=($51-$2)^2}END {print... (3 Replies)
Hi All,
I have one sensor output(over the same) for a set value of 20.
Time(in Sec), Data
1, 16
2, 20
3, 24
4, 22
5, 21
6, 20
7, 19.5
8, 20
9, 20.5
10, 20
11, 20
12, 19.5
Here we can see like after 5 sec of time the data value reaches to 20+-0.5 range.
So I... (7 Replies)
Hi,
Will following set up work in bash script? I've got errors if assigning following binary command to a variable. But on the other hand, COMMAND="ls" works. Any explanation please? How can I assign binary command to a variable COMMAND then I can just call ${COMMAND}?
COMMAND="rsync"... (3 Replies)
Hi,
I am looking for a shell script which serves the below purpose.
Please find below the algorithm for the same and any help on this would be highly appreciated.
1)set of strings need to be replaced among set of files(directory may contain different types of files)
2)It should search for... (10 Replies)
Hi,
I have 100 files containing different values in single column,
I want to split those files in two separate files (file2 and file3) based on average value of first column of each file,
for those files I am working on the following script
#bin/bash
for memb in $(seq 1 100)
do
awk... (4 Replies)
Hi
I have a root script which is setting up user and his dirs and so on. After I create user and set up all the necessary I have to manually set user password. I try all possible ways what google find me and nothing works for me. If maybe one of you have a solution for my problem it will be... (1 Reply)
Discussion started by: Jaffakeks
1 Replies
LEARN ABOUT PLAN9
grep
GREP(1) General Commands Manual GREP(1)NAME
grep - search a file for a pattern
SYNOPSIS
grep [ option ... ] pattern [ file ... ]
DESCRIPTION
Grep searches the input files (standard input default) for lines (with newlines excluded) that match the pattern, a regular expression as
defined in regexp(6). Normally, each line matching the pattern is `selected', and each selected line is copied to the standard output.
The options are
-c Print only a count of matching lines.
-h Do not print file name tags (headers) with output lines.
-i Ignore alphabetic case distinctions. The implementation folds into lower case all letters in the pattern and input before interpre-
tation. Matched lines are printed in their original form.
-l (ell) Print the names of files with selected lines; don't print the lines.
-L Print the names of files with no selected lines; the converse of -l.
-n Mark each printed line with its line number counted in its file.
-s Produce no output, but return status.
-v Reverse: print lines that do not match the pattern.
Output lines are tagged by file name when there is more than one input file. (To force this tagging, include /dev/null as a file name
argument.)
Care should be taken when using the shell metacharacters $*[^|()= and newline in pattern; it is safest to enclose the entire expression in
single quotes '...'.
SOURCE
/sys/src/cmd/grep.c
SEE ALSO ed(1), awk(1), sed(1), sam(1), regexp(6)DIAGNOSTICS
Exit status is null if any lines are selected, or non-null when no lines are selected or an error occurs.
GREP(1)