Programming :: Bash - How To Control Output Style?
Aug 24, 2009For example,I have three paragraphs,as following:
I want to output it as following:
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Programming :: Bash Background - & - With Control Operators -&&
Feb 11, 2009I have a set of files to copy and decompress, and want to do these operations concurrently with a script.
Manually it would be something like:
Code:
The single & is intended to background the processes, while the && is intended to execute the gzip process if and only if the cp completes successfully.
My script is:
Code:
When I run it, bash gets angry with the following error:
Code:
So what is the proper syntax to accomplish this?
Programming :: Using A Variable To Control A BASH For Loop
Jul 3, 2009I know of 4 different ways to use a for loop:
1. for I in {1..10}; do echo $I; done|
2. for I in 1 2 3 4 5 6 7 8 9 10; do echo $I; done|
3. for I in $(seq 1 10); do echo $I; done|
4. for ((I=1; I <= 10 ; I++)); do echo $I; done
I have a script which uses the 1st form of for loop. I'm trying to modify it to use a variable instead of a static hard-coded value in the section that controls the looping.of the for loop.
I've tried all different ways of quoting and escaping the variable, and the problem is that the quoting chars and escape char are being translated and passed into the loop along with the value stored in the variable.
For example, to change the start value of 1 to whatever value I want passed in through a variable:
Change:
I have tried: {{$a}..10} and {`$a`..10}, to have the variable evaluated first.
I have tried using the eval() function.
I have tried single and double quotes and the backslash escape character.
Nothing I've tried works. It's probably a syntax error.
Programming :: Bash: Capture All Output To A Log?
Jun 10, 2010I have a script that generates a bunch of output, including the expansions details provided by: set -v -xI am trying to pipe everything that is displayed to a file, in addition to displaying it on the screen. I've managed to get stderr and stdout into the file, but the expansions are only printed to the screen. Here is what I have so far:sudo -u <user> source my_job.sh |tee my_log.txt 2>&1
View 2 Replies View RelatedProgramming :: Retain The Eol In Bash Variable Or Ssh Output?
Jan 17, 2011I have to save the result of ssh/grep into a file to keep the eol ("/n"):
ssh $SSH_OPTIONS $USER@$NODE "cd $LOG_DIR; grep -h '$pattern' log.*" > $file
So that when I grep on the local file again later, it can be printed out with original log lines. Otherwise, the log lines will be dropped and lines becomes concatenated into a single line, e.g., if I rewrite the script in this way, echoing the $result is not a good idea..
result=`ssh $SSH_OPTIONS $USER@$NODES "cd $LOG_DIR; grep -h '$pattern' log.*"`
is there some workaround that I can save it to a variable rather than file but still keep the eol? That will simplify my script and don't need to do all those I/Os!
Programming :: Java Output Into Bash Variable?
Feb 20, 2011I have a bash script that calls a java class method. The method returns a string to the linux console when run independently. how can I assign the value from the java method to a variable in a bash script?running the script: java -cp /opt/my_dir/class.method [parameter]
output: my_string if added in a bash script:
read parameter
java -cp /opt/my_dir/class.method [parameter] | read the_output
echo $the_output
the above doesnt work, I also tried unsuccessfully:
the_output=java -cp /opt/my_dir/class.method [parameter]
the_output=`java -cp /opt/my_dir/class.method [parameter]`
java -cp /opt/my_dir/class.method [parameter] 2>&1
How can i get the output stored into the_output variable?
Programming :: Sed In A Bash Loop With Ascending Output?
Jan 1, 2011I have a file like below:
PU12829,24869;PD15733,24869;PD15733,19785;PD12829,19785;PD12829,24869;
PU4599,20915;PD9924,20915;PD9924,18898;PD4599,18898;PD4599,20915;
PU12829,24869;PD15733,24869;PD15733,19785;PD12829,19785;PD12829,24869;
PU4599,20915;PD9924,20915;PD9924,18898;PD4599,18898;PD4599,20915;
PU1723,3423; #this line is ignored to short
[Code]...
What I'm trying to do is while true, cut each line from file that begins with PU and thats longer than 12 characters and write to a increasing numbered file for each line. Stating with object1 etc.
Programming :: Using Bash Command To Execute Output Of Awk?
Mar 24, 2011I am trying to process a column separated data file, with a few bash command. For example, I have
Code:
file1 aaaa yes
file2 aaaa no
file3 bbbb yes
Let say I want to create new file with the output of first column and do something else with the output of 3rd column. Of course there are many ways to process this data file, but I wish to know by using awk, how could I do it. I'm trying:
Code:
awk '{system("touch $1")}' datafile
but the shell command will not able to get the awk '$1' output. How do I get this done ? And for another question, if the data file contains the variable name of a shell variable, how could I make use of it during a awk output ? For example I have a datafile1:
Code:
server1 yes
server2 no
And in another server declaration data file, I got this datafile2:
Code:
server1=xxx1
server2=yyy1
And in my awk script, I want to achieve something like (the syntax is definitely wrong, just to demonstrate what I assume it will like):
[code]....
OpenSUSE :: Desktop Freeze After Change Control Style?
Aug 4, 2011I'm trying to play with different control style at application settings-controlstyle, after change a little bit of settings, the desktop freeze nothing can click,so I goto control+alt+f2,hit control+alt +delete, after restart, It freeze again, so where it store the settings about that so I can change it to default control style from terminal only acess since dekstop freeze all the time?
View 2 Replies View RelatedProgramming :: Bash - Redirect All Subsequent Std Output To File?
Feb 11, 2010I have got a script with an outer and inner loop. The inner loop issues loads of echo's which need to be redirected to a log file determined by the outer loop. The obvious solution is to redirect every echo to >$LOG and set LOG in the outer loop.
Code:
for f in $FILES ; do
LOG=<logfile>
for l in $LINES ; do
[code]....
it is possible to map stdout to $LOG in the outer loop without having to redirect every subsequent individual command output?
Programming :: Bash Output With Timestamp Removing Duplicates
Nov 20, 2010I'm writing a bash script to auto run on boot in Tinycore.
This is a watered down version.
Code:
I need it to either not add the time stamp if the awk finds a duplicate or write over the time with the new time if awk finds a duplicate.
BTW this is all pretty much cut-and-paste scripting so please feel free to comment if you know a more elegant way.
Programming :: Bash: Passing Output To Another Programs Input?
Nov 12, 2009I am not sure if that Subject really explains it, basically I have a script that executes a CLI java-applet that requires a passphrase from the user. I can easily execute this by issuing the -p argument followed by the passphrase however that shows up on possible logs or at least on the results of the ' ps ' command. If you do not supply this -p argument it provides a new line with the echo " Enter Passphrase: " and asks for input.
how can I provide a result/input for the Passphrase request and is it still possible to throw this application in the background with the ' & ' following the command? I have seen a few examples that show a /bin/expect that expects a result and sends a command however I would like to refrain from any extra dependencies. Example of Regular Execution of application:
Code:
$ /usr/local/***/**** -u USERNAME -r Default-Realm -f certificate.der
Password:
Programming :: Bash Scripting - Output As Multiple Files?
Jan 26, 2011I have wrote a 1 line command that parses a file, locates the IP Address in the file and then trims the output the way I want it, and then sorts numerically and by uniqueness and then >> appends to output.txt
I can get all the IP's into 1 file "output.txt", but what I am really looking for is some type of way to create a text file, for each IP it finds labeled xxx.xxx.xxx.xxx.txt and also put that ip address into that file..
xxx.xxx.xxx.xxx = the ip address it finds
Programming :: Changing Color Of Output From Bash Script?
Apr 22, 2010I am writing a bash script that utilizes the output of another script (which I will refer to as script#2.) Script#2 is not owned by me, I cannot modify it. All of the output from script#2 is blue, which makes it difficult for me to read.
I would like to have the output of it changed to grey. Is there a way I can do that in my script? A command I can pipe the output to?
Edit: One other question related to this. I put a trap function in my script that works well. Script#2 essentially runs a tail -f. When I ctrl+c to stop it, it stops script#2 and never calls the trap in my script. Is there any way I can work around that?
Programming :: Organize Bash Script Output Of Which Is Like On Top Command
Sep 12, 2010Is it possible to organize bash script output of which is like on top command i.e. monitoring every let's say 1 sec and old information would cleared?
View 3 Replies View RelatedProgramming :: BASH - Output Of Snmpget With Multiple OIDs Into Separate Variables
Jul 7, 2010I have a problem with snmp answers being empty or having spaces.
What I already have:
#get all interface indexes (if you wonder - I'm working for a cable company and different cablemodems have different number and types of interfaces):
The problem is the physical address which is sometimes empty and the description which has spaces. So I'm doing 2 snmpgets which is slower than 1 snmpget (sometimes I have up to 18 interfaces).
I'm trying to explain it a bit simpler.
Interface 5 gives me back the following lines:
Ethernet CPE Interface
Now the first line should go into variable ifadm,
2nd line should go into variable ifoper,
3rd line should go into variable ifspeed,
4th line should go into variable iftype,
5th line (which is empty) should go into variable ifphys and finally
6th line (which has spaces) should go into variable ifdescr
Programming :: Creating Array From Command Output (Bash Shell Script)
Jan 26, 2011I have a command that outputs n lines of text, and I want to place each line into an array element, but I can't seem to get the syntax correct
So my command is this:
cat $configfile | sed -n '/cluster:'$clustername'/,/cluster/ p' | awk /host/
Which produces many lines depending on the value of $clustername. I'd like to get each line as elements of an array.
Programming :: Bash - Automatically Build A Set Of Packages And Redirect Output Into Logs - Failed Make Should Return A Non-zero Value
Jun 27, 2011I have a set of bash scripts that I'm running that automatically build a set of packages for me and redirect their output into logs. Basically, I have a bunch of lines that are something like this: ${CONFIGURE_DIR}/configure &> ${LOG_DIR}/log or cd ${CONFIGURE_DIR} && make &> ${LOG_DIR}/log, etc.
This is supposed to make the entire process silent. However, sometimes with some packages some output leaks to my console (either stdout or stderr). I'm thinking that maybe the configure scripts/make are executing commands within new shell instances that don't inherit my redirect, or something to that effect.
Another reason for thinking this is that in another part of my script I detect errors when running make by testing with "if [ $? -ne 0 ]", and if the redirect leaks to my console and also the leaked output indicates that the build failed ("make: Error" and so on), then my $? test fails (i.e., it thinks that $? == 0, whereas a failed make should return a non-zero value). It's as if my original script can't "see" the results from child commands executed from later scripts.
General :: Write A Script To Convert All DOS Style Backslashes To UNIX Style Slashes?
May 20, 2011How do I write a script to convert all DOS style backslashes to UNIX style slashes in a list of files /
View 3 Replies View RelatedDebian Multimedia :: Notification In Bar Style Instead Of Box Style?
Nov 14, 2015which kind of package enables the notification bar ("(A) Connection Established I'm running Code: Select allLinux 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1+deb8u5 (2015-10-09) x86_64 GNU/Linux on two machines with i3 window manager but one have notifications in a box, the other one in a bar on the top of the screen. I would like two enable the "bar style" on the second machine as well.
View 4 Replies View RelatedProgramming :: What Is Called The Old Style Of The GUI Interfaces
Nov 27, 2010I'm wondering about this kind of GUI Interfaces like Slackware setup program
What is called ? Also, Can it be used with Python?
Programming :: What's Best Practice For C-Style Stings?
Apr 22, 2011I have searched the net for The Best Practice of C-Style Stings, but the examples i have found aren't sufficient.Can someone please show me The Best Practice for C-Style Stings, or direct me to something i can read that shows in details the best practice.
View 12 Replies View RelatedProgramming :: Bash Ambiguous Redirect - Redirect One Command Output Which Will Be Treat As A Content Of File For Another Command?
Mar 9, 2011I am trying to grep multiple numbers from file, grep does have the -f option for that.
Code: grep -f <`seq 500 520` /etc/passwd I know this could be done with
Code: for i in `seq 500 520`; do grep "$i" /etc/passwd; done But my question is fare more behind this example. It is possible to redirect one command output which will be treat as a content of file for another command ?
Programming :: Preferred Method For Obtaining Harvard Style Referencing In LaTeX Document?
Mar 30, 2011What is the preferred method for obtaining Harvard style referencing in a LaTeX document?
View 1 Replies View RelatedGeneral :: Bash Out Of Control ?
Jul 15, 2010I created a system restore file.
code:
And hav tried out:
Code has been streaming past for ages. Longer than a fresh install!
I'm wondering if i've done something to create a cycle?
How and should i interupt it? If i ctl alt F7, will it take me back to Desktop?
OpenSUSE Multimedia :: Headphone / Speaker Output Affected By Volume Control
Jun 25, 2010Just switched my laptop from that other operating system to openSUSE11.2. Everything works great except for one odd little bug. Both my speakers and headphones have output, are affected by the volume control and it even detects when I plug in headphones and stops output to the speakers. However the moment I adjust the volume, output to my headphones stops, and my speakers start.
Following is my multimedia information: [URL]
~> rpm -qa '*alsa*'
alsa-plugins-pulse-32bit-1.0.21-3.3.x86_64
alsa-plugins-pulse-1.0.21-3.3.x86_64
alsa-plugins-32bit-1.0.21-3.3.x86_64
alsa-1.0.21-3.2.x86_64
alsa-plugins-1.0.21-3.3.x86_64
alsa-utils-1.0.21-3.1.x86_64
alsa-oss-1.0.17-25.2.x86_64
alsa-oss-32bit-1.0.17-25.2.x86_64 .....
Ubuntu Multimedia :: Automatic Switch Audo Output Control To Bluetooth?
Apr 25, 2010I'm using a Hama Voiis bluetooth audio device connected to my stereo. Both my girlfriend (running 9.10) and me (10.4) can pair with, connect to and stream audio from whatever application we use to the device. However to do so requires a couple of manual steps which I'd like to optimise.
First it's necessary to manually connect to device, since we both want to stream to this, connecting manually seems the best since I suppose only one can connect at any one time. Once connected it's necessary to select "Output" in "Sound Preferences" in order to use the keyboard or multimedia keys to change the volume. This latter step is a little annoying since it has to be done every time we connect. Does anyone have a solution that automatically makes this change when connecting?
Ubuntu :: Control Duplicates In Bash History?
Oct 19, 2010I have tried a combination of the following lines in .bashrc to try and control duplicates in the bash history file:
export HISTCONTROL=ignoreboth
export HISTCONTROL=erasedups
export HISTCONTROL=ignoredups
[code]....
Debian :: Control Lynx By Bash Script
Sep 10, 2010I had tried to control lynx by bash script. I can use bash script to let lynx open an url. After that, I can't do anymore. I don't understand how to move the cursor or fill some textbox in the webpage opened by linx in bash script.
View 3 Replies View RelatedGeneral :: Flow Control In Bash Pipe?
Jul 25, 2010Two processes are communicating through a pipe: A | B. A is writing data faster than B is reading it in. Is there any way to have A limit its writing rate to match B's reading rate?
AFAIK the pipe will get full, and will make A's writing block, waiting for B to read in more data. But is there a way to limit A's writing rate before the pipe fills up? (In a way it's like having a pipe with a really small capacity, but as far as I know pipe capacity is a constant compiled into the kernel.)
Code:
EXAMPLE FOR CLARIFICATION
Right now the command is printing out the following in 1-second intervals:
But with flow control it should print out (again in 1-second intervals):
...since "date" would block on the writing loop due to the slow reading loop.