Referencing variables in commands Post: 68047

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Subing Variables with commands.

Hi, I'm back! Ok, I'm trying to use a variable with a value of a unix command. So when I try a=`ls`, then echo $a I get the correct answer. But when I try it with a pipe: a=`ls | wc -c`, then echo $a I get: filename: a: command not found I've tried so many ways I presumme it's the pipe...

2. UNIX for Dummies Questions & Answers

Subtracting Variables which are commands

I have this idea. I have a variable for the start of someones log in time, (start=`who am i | cut -c30-34`) and a variable for the log out time or present time, (end=`date | cut -c12-16`) but how do I go about subtracting them to get the total log in time. I've tried adding a another variable...

3. Answers to Frequently Asked Questions

Passing variables/arguments/parameters to commands

A good place to start is simple variable passing.... Passing variables from one script to another The next level is passing a variable into a more complex command such as using a variable in a sed command. There are some simple quoting techniques that are very general. These are mentioned...

4. Shell Programming and Scripting

Using variables in sed commands

Hi there, I need to be able to put the hostid of my box into a file (replacing the text "enter_hostid_here" so i tried sed -e 's/enter_hostid_here/`hostid`/g' inputfile > outputfile but it takes the `hostid` literally as text .....how can I get this info into the file (ideally in a single...

5. Shell Programming and Scripting

Storing commands in $variables.

Hi I'm trying to store commands in variables... like so.. # lastcmd=" $t1 | $t2 | $t3 | $t4 | sort | uniq" t1="sed -e 's/http:/<li><a href=\"http:/'" t2="sed -e 's/http:.*/&\">&<\/a>Web Link<br>/'" t3="sed -e 's/.*. mailto:/<li><a href=\"mailto:/'" t4="sed -e...

6. Shell Programming and Scripting

Using variables within awk/sed commands

Can I use my own variables within awk and sed for example: I've written a while loop with a counter $i and I want to use the value of $i within sed and awk to edit certain lines of text within a data file. I want to use : sed '1s/$/texthere/g' data.csv Like this: sed '$is/$/$age/g' data.csv...

7. Shell Programming and Scripting

Piping through commands read as variables from file

This is going to be part of a longer script with more features, but I have boiled it down to the one thing that is presently stumping me. The goal is a script which checks for updates to web pages that can be run as a cron job. The script reads (from a tab-delim file) a URL, an MD5 digest, and an...

8. Shell Programming and Scripting

Send Remote Commands via SSH with variables

Hi there I found the Command to send commands to other servers like: sv01> ssh user@sv02 'ps -ef' But I cant use Variables from a script i want to execute on another server like: sv01> ssh user@sv02 'cd $SCRIPTHOME' although the variable is set on sv01. How can I run commands on sv02 with...

9. Shell Programming and Scripting

Variables into SED or AWK and multiple commands

Hello I am hoping you may help. I am not sure how to go about this exactly, I know the tools but not sure how to make them work together. I have two SED commands that I would like to run in a shell script. I would like to take the manual input of a user (types in when prompted) to be used...

10. Shell Programming and Scripting

How to put variables commands in config files?

Hi All, Seeking for your assistance on how to put in variables all the commands in /bin config files: /home/test/config_file/config.cfg cat /home/test/config_file/config.cfg ECHO=/bin/echo LS=/bin/lsMain script cat test.sh source=/home/test/config_file/config.cfg ECHO=$ECHO LS=$LS#i...

LEARN ABOUT DEBIAN

snnewgroup

snnewgroup.v0.3.8(8)					      System Manager's Manual					      snnewgroup.v0.3.8(8)

NAME

       snnewgroup - create a new sn newsgroup

SYNOPSIS

       snnewgroup newsgroup [server] [port]

DESCRIPTION

       snnewgroup creates newsgroup assigning it an upstream NNTP server of server:port.  If port is not specified, defaults to 119.  If server is
       also not specified, newsgroup is created as a local group which is fed only by articles POSTed to it.

       You will need to be root or own /var/spool/sn in order to add new groups.

ENVIRONMENT VARIABLES

       SNROOT If this is set and is not empty, the value is used in place of /var/spool/sn, the default news spool directory.

FILES CREATED

       /var/spool/sn/newsgroup
	      Directory where articles will be stored.

       /var/spool/sn/newsgroup/.created
	      Empty file for the newsgroup creation time.

       /var/spool/sn/newsgroup/.serial
	      Where snget gets its idea of the new starting serial number for newsgroup on server server:port.	The value is initialized to 0.

       /var/spool/sn/newsgroup/.outgoing
	      If server is specified, is a symlink to  /var/spool/sn/.outgoing/server:port, which is a directory, created if it does  not  already
	      exist.  If server is not specified, no file /var/spool/sn/newsgroup/.outgoing will be created.  See also snsend.

SEE ALSO

       sndelgroup, snsend

N.B.								    Harold Tay						      snnewgroup.v0.3.8(8)