Assuming that $OPTIONS does not expand to a string containing anything other than alphanumeric characters and <space>s, one could also use:
without worrying about having a shell that supports the case modification parameter expansion or the shuf utility which are both extensions to the standards.
This User Gave Thanks to Don Cragun For This Post:
hi all,
i'm new to shell scripting, so i'm not sure how to work this. Is it possible to read in the contents of a variable and add it to a command? for example:
------------------------
#!/bin/sh
set example = -dfr
rm ${example}
------------------------
when i run the script, i want... (2 Replies)
I want to save the contents of a variable to a file. How can that be achieved?
I have tried with:
echo $varname > textfile.txt
but for some reason it does not print anything. (1 Reply)
Hi ,
I have
#echo $var1
#hdisk2 hdisk3 hdisk0 hdisk2
Now I need to remove duplicate entries from this . ie. after sorting it should only have
hdisk2 hdisk3 hdisk0 .
I can have these values in a array as well . I understand we can use sort -u to remove the duplicates in a... (2 Replies)
Hello All,
I've written a script to collect all audit logs files; now i want to see only the files from it which contains certain x tablenames. I've stored all the tablenames in a log file and using it through variable in a script (ex:below)
$ more tablenames.log (this is just a samle... (2 Replies)
My file is in this format :
username : student information : default shell : student ID
Eg :
joeb:Joe Bennett:/bin/csh:1234
jerryd:Jerry Daniels:/bin/csh:2345
deaverm: Deaver Michelle:/bin/bash:4356
joseyg:Josey Guerra:/bin/bash:8767
michaelh:Michael Hall:/bin/ksh:1547
I have to... (1 Reply)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
I have to read the contents of each field of a file creating user accounts.
The file will be of format :
... (6 Replies)
Hello, All. This is my first post here, and I expect that the answer is simple, but I can't find it. Might be the way I'm searching. I'm fairly new to Unix/Linux, and I'm writing a Korn Shell Script. I am trying to provide a value that is already in a variable to awk so that awk can pull out the... (3 Replies)
Hi one of the output of the command is as below
# sed -n "/CCM-ResourceHealthCheck:/,/---------/{/CCM-ResourceHealthCheck:/d;/---------/d;p;}" Automation.OutputZ$zoneCounter | sed 's/$/<br>/'
Resource List : <br>
*************************** 1. row ***************************<br>
... (2 Replies)
Hi All,
I was trying a shell script. I was unable to store file contents to a variable in the script. I have tried the below but unable to do it.
Input = `cat /path/op.diary`
Input = $(<op.diary)
I am using ksh shell. I want to store the 'op.diary' file contents to the variable 'Input'... (12 Replies)
Discussion started by: am24
12 Replies
LEARN ABOUT CENTOS
look
LOOK(1) User Commands LOOK(1)NAME
look - display lines beginning with a given string
SYNOPSIS
look [options] string [file]
DESCRIPTION
The look utility displays any lines in file which contain string. As look performs a binary search, the lines in file must be sorted
(where sort(1) got the same options -d and/or -f that look is invoked with).
If file is not specified, the file /usr/share/dict/words is used, only alphanumeric characters are compared and the case of alphabetic
characters is ignored.
OPTIONS -a, --alternative
Use the alternative dictionary file.
-d, --alphanum
Use normal dictionary character set and order, i.e. only alphanumeric characters are compared. (This is on by default if no file is
specified.)
-f, --ignore-case
Ignore the case of alphabetic characters. (This is on by default if no file is specified.)
-t, --terminate character
Specify a string termination character, i.e. only the characters in string up to and including the first occurrence of character are
compared.
-h, --help
Display help text and exit.
-V, --version
Output version information and exit.
The look utility exits 0 if one or more lines were found and displayed, 1 if no lines were found, and >1 if an error occurred.
EXAMPLE
sort -d /etc/passwd -o /tmp/look.dict
look -t: root:foobar /tmp/look.dict
FILES
/usr/share/dict/words
the dictionary
/usr/share/dict/web2
the alternative dictionary
SEE ALSO grep(1), sort(1)COMPATIBILITY
The original manual page stated that tabs and blank characters participated in comparisons when the alphanum option was specified. This
was incorrect, and the current man page matches the historic implementation.
HISTORY
The look utility appeared in Version 7 AT&T Unix.
AVAILABILITY
The look command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
util-linux June 2011 LOOK(1)