For example if you want to create an alias in Linux with a message echoed into the variable would the following command be; alias hello="(echo)"Hello." "? I'm trying to learn some environment variables and aliases.
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How would i go about echoing stuff like $database, but as the word, not the variable?for example:$l = "$database = $db" where $database is supposed to be the word, while $db is the variable
View 9 Replies View RelatedI am supposed to create an environment variable with the PRINTER variable, which should resolve to the word sales. Would the command be like this?: env PRINTER - NAME=SALES (is this the command to create that variable with resolving the word sales to it?)
View 3 Replies View RelatedI have a text file i that has a mailTo: NAME in it. In a bash script i need to extract NAME and put it in a $variable to use. How do i do this?
View 2 Replies View RelatedI want to underline my user & hostname in the PS1 variable, but I cant seem to do it.
I know that my Xterm can underline text normally, because when I pass Xterm the '+nul' option, then do this:
Code:
It underlines. I just cant seem to get it to work for my PS1 variable, although its quite possible Im doing it incorrectly. has anyone managed to do this, is it possible?
Here is my PS1 variable:
Code:
i am on processing text tasks And i found that if you assign a text to a variable is chomp'ed automatically the newline
Code:
variable=$(cat file.txt)
The problem is i can only access the items/lines using:
Code:
for line in $variable
do
echo $line
# Other commands
done
how do i convert this to an indexed array. More importantly, how do i get access to individual $line[0], ..., $line[n] Another thing, if the file.txt, has lines with spaces it is a mess using the for...in..., but echoing prints line by line...o_0
I have /var on it's own partition. Should i direct mail, in /etc/alises, sent to root to my normal local user or will /var end up getting filled up with mail, if i do that?Also:I went on the forums for dynDNS.com, explaining that i was setting up a network that includes a web server and a mail server. They rightly pointed out that i only needed to set up a DNS A record for webserver.dyndns.org. The mail server would be located by this DNS A record, as both machines share the same external I.P address(the external I.P of my ADSL router). So my mail addresses could be me@webserver.dyndns.org. So both machines would be reachable with the same DNS A record, and port-forwarding on my ADSL router would determine which host got which requests. That's what they said i should do for my scenario.
Bearing this in mind what should the values of $myhostname, $mydomain, $mydestination and $myorigin be?
My current thoughts, on the simplest way to do this, are:If $myhostname is mailserver.webserver.dyndns.org, then $myorigin can be webserver.dyndns.org, then $mydomain is webserver.dyndns.org and $mydestination has it's DEFAULT setting(mydestination = $myhostname localhost.$mydomain localhost).This the simplest workable approach right?, if not what are the best values for these parameters?.Also I have /var on it's own partition. Should i direct mail, in /etc/alises, sent to root to my normal local user or will /var end up getting filled up with mail, if i do that?
I would like to create some aliases for bash shell. On other Unix/Linux machines I have done this using the alias command like this: alias rm rm -i
When I type that into a terminal on Ubuntu, it looks like alias is not installed. I get this:
bash: alias: rm: not found
bash: alias: rm: not found
bash: alias: -i: not found
I tried adding the alias to .bashrc instead, but then I get the same error message every time I start terminal. Just for fun I tried apt-get install alias, just to see what would happen, and it installed something called libperl-alias instead, and alias still doesn't work.
I installed postfix on my ubuntu server.I have created some users.How can I create e-mail aliases?For example, I have a user named "light" and I want to create for him an e-mail address.
View 3 Replies View RelatedWhat I have works, but wondering what is the 'right' way to replace the digits with the letters given in this loop? somehow use a case or multiple sed? i thought of a multiple sed or a case but couldn't get it to work
Code:
# ...
bcv=$(echo $line | awk -F" " '{ print $1 }' | sed 's/1/q/g;s/2/w/g;s/3/e/g') # and so on
Code:
while read line
do
bcv=$(echo $line | awk -F" " '{ print $1 }')
if [ $bcv == "" ]
[code].....
I'm using rhel5 i configured postfix on it. need is to create virtual table and virtual.db. How can i create these
View 1 Replies View RelatedI need to search a text file for a string of numbers which are different lengths, and always are between number=" and " like:
number="1234567890"
number="22390"
I need to grab those numbers and pipe each one to a line in a file. I've already tried something with awk and that didn't seem to work.
I am able to send a mail message to myself from a server without any problem...
But after I have updated /etc/aliases and added the line for all of root's mail to be routed to me....
Added:
root: myemail@company.com
and ran newaliases to implement it....
If I send a mail message to root, it does not get routed to my email...
I need to create a single line of output from multiple and variable lines of input in a Linux bash shell script.
My input file looks like this:
Where there may be any number of umsecondaryphonenumber lines; if there is not a umsecondaryphonenumber line for a telephonenumber, I don't want to write any output.
So, the output file should look like:
The script I have so far is:
My question is - how do print each of the elements of an array in one record - i.e. what do I put in place of howdoiprintarray?
Can anyone point me to a well working peace of software (free will be preferred) that can convert text-files into pdf.
View 6 Replies View Related1. I need guide on how to create a folder name from the text file with .txt format.
2. First, I call the function of reading the directory.
3. Then, I dont know how to do.
4. Finally, I close the directory
This is my source code in perl
## read text.txt file ##
open F, "from/$directory/text.txt";
read F, $buf, 9999;
close F;[/size]
This source code is used to print the folder with date format like "ddmm" d stands for day and m stands for month
if ($command =~ s/-O "(.*)"/-O "$websites/$month/$file"/)
Instead, I want to have the name from text.txt to be folder name
create a shortcut to my email, so when im loggin in on different homepages,i can just press ex ALT+F1 and my email will be written in the selected area..
View 4 Replies View RelatedI would like to create a command in the vim that saves a text document and also compile it. Is it possible?
View 4 Replies View RelatedThe output of following code is not like it's intended ...
Code:
This is the output:
Code:
Test prepending ...apple is a nice word, hour is a nice word, But of course what I want to do in the first set of commands is to prepend the word "an" to the words "apple" and "hour" in the for-loop.
I want to get the last term of an unknown-sized text line, by usig the awk command. Is there any variable which points to the last term of a text line ? (obviously, y can obtain that term if i knew how many terms does the line have... i.e. awk '{print $12}' ; if we are talking about a 12-terms text line) I wonder if there is an option like $?, to get the last term.
View 2 Replies View RelatedCode:
#!/bin/bash
VARR=`cat /proc/asound/cards | grep HDMI | cut -c 1-2`
VARX="defaults.ctl.card $VARR"
VARY="defaults.pcm.card $VARR"
FILE1="alsa"
FILE2="alsa.new"
echo $VARX
echo $VARY
sed "s/defaults.ctl.card*/'$VARX'/g" $FILE1 > $FILE2
This is what I have right now. Well, I thought I knew sed, and apparently I don't... I tried writing this for someone else, and this has given me trouble, so since the user pretty much figured it out on his own, here it goes.
Say VARR=1, so VARX and VARY contain the above text, appended by 1.
What I am trying to do is replace the text "defaults.ctl.card 0" by VARX and "defaults.pcm.card 0" by VARY. The contents of FILE1 is the file being used to search for both text fields, and FILE2 is the output file. I tried using single quotes, double quotes, and a mixture of both, and no go whatsoever. So my question... What is the proper way of searching for text within a file and replacing with a variable?
I am trying to think of a logic where my file contains some data I had to read and do some processing. Issue is that file contains data multiple times. For example:
:::::::::::
var1=value1
var2=value2
[code].....
I have to read first paragraph of variables and do some processing and then move on until the end of file. Variable names are same in whole file but for each paragraph the value is different. I can't think of a logic to attain this task. How can I do it? It should be a simple bash script, but I am not able to work out.
how to assign a local variable value to a global variable....
View 2 Replies View RelatedI need to backup my data through the cloning or echoing option, which means I want to have my new files/folders in the left copied to the right, replacing older files if that's the case, but I also need the deleted files and folders on the left to be deleted on the right.
I'm using Conduit right now, but it doesn't clone folders/files, also tried Synchrorep but the same issue. Should I try Unison or Rsync? Will they offer this option? Other options?
I'd like have some text written on my grub2 boot menu.
In legacy grub you could just add: title Foobar and you'd get "Foobar" displayed.
I tried: menuitem "Foobar" {} grub2, but it doesn't work. Any ideas how do you do something like that?
(Yes, I know writing grub.cfg by hand is not very smart. But I have a special situation: I wrote my own grub.cfg on a dedicated boot partition from where I chainload to other grub on other partitions. Those secondary grubs generate their grub.cfgs on the fly, so everything is OK )
Bash 3.1.7
Suppose this bash script:
Code:
#!/bin/bash
ls foo
I would like the output to be
Code:
ls foo
foo
That is, the command is first echoed then executed. Is it possible to do this? Or is the only way to debug the script?
I am busy learning shell scripting, and I managed to get my first few right, but now I am trying to do something that I know how to do in Windows, but not in Linux. Basically, during a file copy, I want to create a new date for each folder on a daily basis to copy backups into.so, in windows the syntax would be "xcopy %systemroot%ackupslah.blah \servernameackups\%date%"in linux I am running a "cp blah.gz /mount/blah" I want to create a folder with the date based on the current date.anyone know how to get the same right in shell script?
View 10 Replies View RelatedIs it possible to create a global struct variable with predefined member values?Only one instance of that struct is ever needed.
View 1 Replies View RelatedBelow are few of my questions that i am worried about.
1. alias command will list me all aliases. How to find where these aliases are located?
2. Please suggest me few resources on XWindows
I just noticed that my .bashrc aliases (eg. alias www='cd ~/data/public_html') don't work from within tmux. They work fine from screen, though.
I don't think I've got anything special in ~/tmux.conf
Code:
# C-a just like in screen
unbind C-b
set -g prefix C-a
[Code].....
