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  • Make a Phone ring from BASH through a HUAWEI e220

    - by microspino
    Hello, I have a Debian Linux system with a HUAWEI e220 on /dev/ttyUSB0. I'd like to make It ring a generic GSM phone for just one time. I'm doing this because I'd like to build an embedded system that fires some special behavior by a single GSM phone ring. How can I do It? I've tried wvdial but I receive always a "NO CARRIER" answer when I try to send It an "ATDT XXX-phone-number-to-dial-XXX" command.

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  • Creating new bash command for Sublime Text 2

    - by Gavin
    I'm trying to get Sublime Text 2's command line alias working. The instructions make perfect sense: Run ln -s "/Applications/Sublime Text 2.app/Contents/SharedSupport/bin/subl" ~/bin/subl So, in ~/bin, subl exists. However, even when I restart terminal, the command 'subl' is not found. The path specified to the application's subl file is correct, I've verified that. Logging out does not fix it. Any help would be awesome!

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  • Difference between sending data via UDP in Bash and with a Python script

    - by Kevin Burke
    I'm on a Centos box, trying to send a UDP packet to port 8125 on localhost. When I run this Python script: import socket sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.sendto('blah', ("127.0.0.1", 8125)) The data appears where it should on port 8125. However when I send the data like this: echo "blah" | nc -4u -w1 127.0.0.1 8125 Or like this: echo "blah" > /dev/udp/127.0.0.1/8125 The data does not appear in the backend. I know this is horribly vague but it's UDP and it's hard to determine why one packet is being sent and the other is not. Do you have any ideas about how to debug this issue further? I'm on a Centos machine.

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  • What does export do in BASH?

    - by Chas. Owens
    It is hard to admit, but I have never really understood what exactly export does to an environment variable. I know that if I don't export a variable I sometimes can't see it in child processes, but sometimes it seems like I can. What is really going on when I say export foo=5 and when should I not export a variable?

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  • invalid argument in bash script when port is bad

    - by user273689
    When I do this command I get an error when there is something wrong with the eth3. RESC="1234" RESD="1234" RESO="1234" RESC=$(ssh -q vmx@$1 cat /sys/class/net/$2/carrier) RESO=$(ssh -q vmx@$1 cat /sys/class/net/$2/operstate) RESD=$(ssh -q vmx@$1 cat /sys/class/net/$2/dormant) cat: /sys/class/net/eth3/carrier: Invalid argument cat: /sys/class/net/eth3/dormant: Invalid argument How can I use the invalid argument inside the RESC and RESD variable Thanks

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  • rsync bash script to backup specific directories nightly to remote server

    - by Janice Young
    Hello, I am looking for a rsync script that will backup specific directories from my home machine to a remote server nightly. So say: /home/me/Pictures to ssh -p 6587 [email protected]/Pictures. It would be nice if it can look for changes but im not worried so much about the changes aspect is having a script that runs at a certain time of night with cron or however. I have googled and found scripts but those scripts were specific to the operations of those creators. Any help would be happily accepted as the scripted part really throws me off. Thank you, Janice

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  • Reverse bash console text flow

    - by radman
    Hi, This is a bit of a weird question and I'm not sure that there is any easy answer to it but I am very interested in finding a solution. So when I work on a linux machine via a console I find that I am constantly staring at the bottom of the screen, as once you have executed a bunch of commands text fills toward the bottom. Now I find that this is decidedly not good for my neck and it would be far better if instead of scrolling to the bottom, the text would scroll to the top instead. So does anyone out there know if there is a way to reverse the direction text appears in a console? (note that i am aware of the clear command) Example: default behaviour user@machine:~$ command 1 user@machine:~$ command 2 user@machine:~$ command 3 user@machine:~$ __active_prompt__ desired behaviour user@machine:~$ __active_prompt__ user@machine:~$ command 3 user@machine:~$ command 2 user@machine:~$ command 1 Running Kubuntu 10.04 using Konsole I realise this is an odd question, thanks for any help.

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  • Placement of command line options in bash

    - by Nathan Rambeck
    I just starting using a Mac and have been frustrated that command line options are required immediately following the command so that this works: ls -la /usr but this doesn't: ls /usr -la ls: -la: No such file or directory Is there any way to change this? Or can someone tell me why the placement of options is agnostic on most Linux platforms, but not on Mac?

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  • Prefix time to each line of bash command output

    - by neildeadman
    I am running the top command to see details about specific processes. The output is piped to grep like so: top -n 1 | grep jre The output is usually around 4 lines, and I would like to prefix the current time to each line so it would be something like: Before: 2772 deleteme 20 0 2832 1156 872 R 2.0 0.1 0:00.01 top After: 13:46 25-08-2012 2772 deleteme 20 0 2832 1156 872 R 2.0 0.1 0:00.01 top

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  • Bash loop to move directories on a remote host via ssh

    - by I Forgot
    I'm trying to figure out a way to perform the following loop on a remote host via ssh. Basically it renames a series of directories to create a rotating backup. But it's local. I want it to work against directories on a remote host. while [ $n -gt 0 ]; do { src=$(($n-1)) dst=$n if [ -d /backup/$src ]; then { mv /backup/$src /backup/$dst; } fi; } ((n--)) done;

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  • bash pipe construct to prepend something to the stdoutput of previous command

    - by AndreasT
    I want to use sendmail to send me stuff and want to do it in a oneliner. echo "mail content" | sendmail emailataddres.com Sends it without subject. The subject line must come before the Mail content, so I am looking for something along the lines of: echo "mail content" | prepend "Subject: All that matters" | sendmail emailataddres.com sed and awk tend to be really awkward to use and remember. EDIT:Just to clarify: echo "Mail content" is just an illustrating example. I need to be able to prepend stuff to stdout streams from any source. e.g.: ifconfig, zcat, etc..

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  • Conditional blocks of code in linux bash

    - by Arek
    Nearly everybody knows very useful && and || operators, for example: rm myf && echo "File is removed successfully" || echo "File is not removed" I've got a question: how to put a block of commands after && or || operators without using the function? For example I want to do: rm myf && \ echo "File is removed successfully" \ echo "another command executed when rm was successful" || \ echo "File is not removed" \ echo "another command executed when rm was NOT successful" What is the proper syntax of that script?

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  • weird problem with bash

    - by Arcath
    I recently changed my .bashrc and tweaked how my PS1 looks, but now it has a very wierd problem, before the end of the line in terminal (about 2 3rds of the way in) it jumps back to the begining of the line like so: e before itarcath@Highgate][~/.gconf/apps/gedit-2/preferences] how long can a command b My first though was was that it wasnt getting the terminal size properly but tput cols returns the correct value. My.bashrc: http://github.com/Arcath/.Files/blob/master/dotfiles/.bashrc

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  • Log Files from bash script output

    - by neildeadman
    I have a script that runs (this works fine). I'd like to produce logfiles from its output and still show it on screen. I have this command that creates three files from this blog: ((./fk.sh 2>&1 1>&3 | tee errors.log) 3>&1 1>&2 | tee output.log) 2>&1 | tee final.log This does exactly what I want it to. My only issue is that I create files in my script and copy them somewhere, and I'd like to copy these logfiles there too, which I can't do whilst this script is running. I also wanted to make it easier for any user to run my script, so I created another script to run this script. According to this post (see last post) I can put a . before the script name and I can use variables assigned in my called script from the first script if I use them in the first. It doesn't seem to work though and I can't figure out why or find alternative methods. Can anyone help?

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  • How to get Bash shell history range

    - by Aniti
    How can I get/filter history entries in a specific range? I have a large history file and frequently use history | grep somecommand Now, my memory is pretty bad and I also want to see what else I did around the time I entered the command. For now I do this: get match, say 4992 somecommand, then I do history | grep 49[0-9][0-9] this is usually good enough, but I would much rather do it more precisely, that is see commands from 4972 to 5012, that is 20 commands before and 20 after. I am wondering if there is an easier way? I suspect, a custom script is in order, but perhaps someone else has done something similar before.

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  • What does this example bash startup script do?

    - by Dimitri
    I am trying to set up GNU Octave on my computer (Mac OS X 10.7.4). I am newbie in using Terminal and I need help to understand what the following script actually does: if [ -f ~/.bashrc ];then<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;. ~/.bashrc<br> fi<br> PATH=$PATH:/usr/local/bin<br> BASH_ENV=~/.bashrc<br> export BASH_ENV PATH<br> export GNUTERM=aqua<br> alias octave="/Applications/Octave.app/Contents/Resources/bin/octave"<br> alias gnuplot="/Applications/Gnuplot.app/Contents/Resources/bin/gnuplot"<br> (taken from here: http://wikibox.stanford.edu/me112/index.php/Main/OctaveMatlabNotes) So this script begins with the simple conditional if statement. I don't understand the conditional expression - what is -f and .bashrc? What the statement . ~/.bashrc actually does? Then 2 variables are defined PATH and BASH_ENV. Why are they exported? Why GNUTERM=aqua is exported even if it's not defined anywhere? All I need is a script that would allow me to run Octave by simply typing octave in the terminal. I don't need an alias for the gnu plot. Thanks

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  • Bash shell prompt: where is $RET?

    - by Evgeni Sergeev
    I was reading this https://wiki.archlinux.org/index.php/Color_Bash_Prompt and ended up with the following: # Stores the status of each command in $RET PROMPT_COMMAND='RET=$?;' # A colour. RED_SHELL='\e[0;36m' # Prints "Status 1" if RET is 1, for example. RET_VISUALISE='$(if [[ $RET != 0 ]]; then echo -ne "Status \[$RED_SHELL\]$RET\n" && RET=0; fi;)' # What to print for each prompt. PS1="$RET_VISUALISE\[\e]0;\w\a\]\n\[\e[32m\]\u@\h \t \[\e[33m\]\w\[\e[0m\]\n\$ " This does almost what I want, except when I press Enter,Enter,Enter multiple times after a command that returned status != 0. In this case it prints "Status 1" every time I press Enter. This is what the && RET=0; part was supposed to get rid of. Also, I don't understand why env | grep RET only shows the PS1 contents. What is the scope of $RET ?

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  • bash shell script which adds output of commands

    - by John Kube
    Let's say I have a command called foo which prints a number to the screen when called: $foo 3 Let's also say I have another command called bar which prints another number to the screen when called: $bar 5 I'm looking to write a shell script which will add together the output of foo and bar. How would I do that? (The outputs from the commands are not known ahead of time. They just so happen to have been 3 and 5 the last time they were run. They could have been something else.) Thanks!

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  • Looking for a recommendation for an OS X Bash manual

    - by Mental Sticks
    I've just begun to use the Terminal in Mac OS X and I've found the man command very useful, although very often the explanations are too compact or complicated for me. I am looking for a very basic reference guide – like O'Reilly makes, for example. But in there I didn't find an entry for basic commands like ls or ln and a layman's explanation of all the flags and options. Could anybody recommend me something?

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  • Bash - Test for multiple users

    - by Mike Purcell
    I am trying to test if current user one of two allowed users to start a process, but I can't seem to get the multi-condition to work correctly: test ($(whoami) != 'mpurcell' || $(whoami) != 'root')) && (echo "Cannot start script as non-ccast user..."; exit 1) Is there a way to test multiple users without have to enter two lines, like this: test $(whoami) != 'mpurcell' && (echo "Cannot start script as non-ccast user..."; exit 1) test $(whoami) != 'root' && (echo "Cannot start script as non-ccast user..."; exit 1)

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  • Delete recursive directorys with FTP command on Bash

    - by Fake4d
    I have a problem with my infrastructure here. I am in a closed DMZ and have to access a FTP-Server in another DMZ from a headless Suse Linux 10.1. So i think i only got the ftp command.. But i have to delete a directory with about 100 subdirectorys and endless files in it.. When I type del directory it returns "Its not empty" and so i have to delete each sub directory and file manually. Oh please tell me a way how i can do this automatically :)

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  • Bash: Quotes getting stripped when a command is passed as argument to a function

    - by Shoaibi
    I am trying to implement a dry run kind of mechanism for my script and facing the issue of quotes getting stripped off when a command is passed as an argument to a function and resulting in unexpected behavior. dry_run () { echo "$@" #printf '%q ' "$@" if [ "$DRY_RUN" ]; then return 0 fi "$@" } email_admin() { echo " Emailing admin" dry_run su - $target_username -c "cd $GIT_WORK_TREE && git log -1 -p|mail -s '$mail_subject' $admin_email" echo " Emailed" } Output is: su - webuser1 -c cd /home/webuser1/public_html && git log -1 -p|mail -s 'Git deployment on webuser1' [email protected] Expected: su - webuser1 -c "cd /home/webuser1/public_html && git log -1 -p|mail -s 'Git deployment on webuser1' [email protected]" With printf enabled instead of echo: su - webuser1 -c cd\ /home/webuser1/public_html\ \&\&\ git\ log\ -1\ -p\|mail\ -s\ \'Git\ deployment\ on\ webuser1\'\ [email protected] Result: su: invalid option -- 1 That shouldn't be the case if quotes remained where they were inserted. I have also tried using "eval", not much difference. If i remove the dry_run call in email_admin and then run script, it work great.

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