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  • How to join two command output

    - by UAdapter
    for example I have command that shows how much space folder takes du folder | sort -n it works great, however I would like to have human readable form du -h folder however if I do that than I cannot sort it as numeric. How to join "du folder" and "du -h folder" to see output sorted as "du folder", but with first column from "du -h folder" P.S. this is just an example. this technique might be very useful for me (if its possible)

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  • echo difference between ubuntu and RedHat

    - by arcomber
    I have mostly been experimenting with ubuntu but recently was using a Red Hat Enterprise system and was surprised at a difference I found setting and displaying env variables. In ubuntu I might have an interaction like this: acomber@mail:~$ export MY_VAR=i686-linux acomber@mail:~$ echo $MY_VAR i686-linux acomber@mail:~$ echo "$MY_VAR" i686-linux But on RHEL: acomber@mail:~$ export MY_VAR=i686-linux acomber@mail:~$ echo $MY_VAR acomber@mail:~$ echo "$MY_VAR" i686-linux I know this is a ubuntu forum but why the difference? Why do I need to enclose in quotes on RH? There are no spaces in the variable name?

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  • With a username passed to a script, find the user's home directory

    - by Clinton Blackmore
    I am writing a script that gets called when a user logs in and check if a certain folder exists or is a broken symlink. (This is on a Mac OS X system, but the question is purely bash). It is not elegant, and it is not working, but right now it looks like this: #!/bin/bash # Often users have a messed up cache folder -- one that was redirected # but now is just a broken symlink. This script checks to see if # the cache folder is all right, and if not, deletes it # so that the system can recreate it. USERNAME=$3 if [ "$USERNAME" == "" ] ; then echo "This script must be run at login!" >&2 exit 1 fi DIR="~$USERNAME/Library/Caches" cd $DIR || rm $DIR && echo "Removed misdirected Cache folder" && exit 0 echo "Cache folder was fine." The crux of the problem is that the tilde expansion is not working as I'd like. Let us say that I have a user named george, and that his home folder is /a/path/to/georges_home. If, at a shell, I type: cd ~george it takes me to the appropriate directory. If I type: HOME_DIR=~george echo $HOME_DIR It gives me: /a/path/to/georges_home However, if I try to use a variable, it does not work: USERNAME="george" cd ~$USERNAME -bash: cd: ~george: No such file or directory I've tried using quotes and backticks, but can't figure out how to make it expand properly. How do I make this work?

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  • nginx points the sub-directory of an alias folder to the base directory

    - by Starry
    I am new to Nginx. Now I have a confusion on nginx configurations: My web site contains folders in different locations: location / { root /Path1 } location ^~ /personal { alias /Path2 } When I query http://mysite/personal, I am accessing the content of /Path2 instead of /Path1 Now I want to add a sub-directory in /personal with specific configurations, so I add: location /personal/download { autoindex on; } But I got 404 error when querying http://mysite/personal/download. According to the error log, I am directed to /Path1/personal/download, which is not correct. How can I configure nginx, such that all access to http://mysite/personal/* will be directed to the same directory in /Path2?

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  • route port 3000 to apache2 alias

    - by user223470
    I have a meteor application running on port 3000. I can successfully connect to the program with www.myurl.com:3000, but would rather connect to it via www.myurl.com/myappname. I started with the instructions on this web site: http://www.andrehonsberg.com/article/deploy-meteorjs-vhosts-ubuntu1204-mongodb-apache-proxy and I have the following Apache configuration file: <VirtualHost *:80> ServerName myurl.com ProxyRequests off <Proxy *> Order deny,allow Allow from all </Proxy> <Location /> ProxyPass http://localhost:3000/ ProxyPassReverse http://localhost:3000/ </Location> </VirtualHost> I do not know how to continue from here to get the program on www.mysite.com/myapp. In other situations, I would use an Alias within the Apache configuration file, but that doesn't seem like the right direction to go in this case. How do I configure Apache to send port 3000 to www.myurl.com/myapp?

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  • ${extension} empty after catch-all alias in Postfix

    - by Paul Wagener
    I want a setup where an e-mailaddress like [email protected] redirects mail to the folder foo. I've already got dovecot configured and tested. It is called by postfix with this line in master.cf: dovecot unix - n n - - pipe flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -f ${sender} -d ${user}@${nexthop} -n -m ${extension} I expect ${extension} to expand to 'foo' but it is always empty. I've added recipient_delimiter = + to my main.cf. How can I get it to work? Update: I've got a catch-all alias that redirects @domain.com to [email protected]. It seems that the extension is empty because of this. So the question becomes: Can I have a catch-all so that [email protected] redirects to [email protected] without explicitly defining either the random or the ext part?

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  • Determine/resolve filepath/alias of a certain command in the Windows command prompt

    - by porg
    How can I find out to which filepath (or alias) a certain command input will point to, in the Windows command prompt? Specifically Windows XP, info on other versions also appreciated! On Unix systems I simply use: $ which commandname /a/commandname Or: $ type -a commandname commandname is aliased to `/b/commandname' commandname is /a/commandname commandname is /b/commandname And I am simply looking for the equivalent in the Windows Shell (specifically Win XP). I came to this general question, from a specific issue: I had installed robocopy.exe (version 026), but the command line "robocopy" always triggers version 010, and I would like to determine where this command points to, in order to correct this mistake.

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  • postfix "mail-pipe" alias shellscript creates permissionless files/dirs

    - by Gung Foo
    I am using an alias to a shellscript in postfix... After the script that is called by the shellscript creates a directory it has no permissions at all.. #!/bin/sh umask 002 cat | php /var/www/html/catchmymail rcvemail result is like this: d--------- 2 apache apache 4096 Sep 17 17:25 50 it works for files tho: -rw-rw---- 1 apache apache 5836288 Sep 18 11:21 test Not even setting umask 002 in the shellscript before it hands the mail on changes a thing Setting umask(0002) inside catchmymail has no effect either. Has anyone seen this behaviour before or an idea to save my day?!? This is extremely confusing and actually insane behaviour from what i understand about umask and file permissions.

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  • Are my Linux symbolic links acting correctly?

    - by Andy Castles
    Hi all I've been using Linux on and off for the last 15 years and today I came across something in bash that surprised me. Setup the following directory structure: $ cd /tmp $ mkdir /tmp/symlinktest $ mkdir /tmp/symlinktest/dir $ mkdir /tmp/symlinktarget Now create two sym links in symlinktest pointing to symlinktarget: $ cd /tmp/symlinktest $ ln -s ../symlinktarget Asym $ ln -s ../symlinktarget Bsym Now, in bash, the following tab completion does strange things. Type the following: $ cd dir $ cd ../A[TAB] Pressing the tab key above completes the line to: $ cd ../Asym/ as I expected. Now press enter to change into Asym and type: $ cd ../B[TAB] This time pressing the tab key completes the link to: $ cd ../Bsym[space] Note that there is now a space after the Bsym and there is no trailing slash. My question is, why when changing from the physical directory "dir" to Asym it recognises that Asym is a link to a directory, but when changing from one sym link to another, it doesn't recognise that it's a link to a directory? In addition, if I try to create a new file within Asym, I get an error message: $ cd /tmp/symlinktest/Asym $ cat hello > ../Bsym/file.txt -bash: ../Bsym/file.txt: No such file or directory I always thought that symlinks were mostly transparent except to programs that need to manipulate them. Is this normal behaviour? Many thanks, Andy

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  • Alias multiple DNS entries to one Amazon S3 Bucket

    - by Tristan
    I have a bucket on Amazon S3. Lets call it "webstatic.mydomain.com". I have a DNS alias setup for that bucket webstatic.mydomain.com CNAME - web-static.mydomain.com.s3.amazonaws.com. This all works great, however for some rather complicated reasons I now need: webstatic.myOtherDomain.com to point to that same amazon bucket so: webstatic.myOtherDomain.com CNAME - web-static.mydomain.com.s3.amazonaws.com. Fails, as the bucket is not called the same as the referring DNS. Can anyone tell me how to have two different DNS entries pointing to the same amazon bucket?

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  • Sendmail.mc: alias all incoming e-mails to one account

    - by Angus
    I need to alias all mail coming from another SMTP server to this one account "myinbox". The system in question is to receive all e-mail on the domain, if that's any help. http://william.shallum.net/random-notes/sendmailredirectallmailfordevelopment is a template for the beginning of a solution, but that routes everything (including outgoing and internal mail) to that one account, and trying to understand how these R rules work is making my head spin. I think the answer is in sendmail.mc rather than any Procmail configuration. So I think what I generally don't want the filter to do is: Interfere w/any outgoing e-mail Interfere w/any internal e-mail Sometimes some cron job causes "root" to mail to "root". I don't want these to go to myinbox. Cause infinite loops Who does? Bounce messages and any DSNs come to mind. I'm running Sendmail 8.13.1 and Procmail 3.22.

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  • Sendmail Alias for Nonlocal Email Account

    - by Mark Roddy
    I admin a server which is running a number of web applications for a software dev team (source control, bug tracking, etc). The server has sendmail running solely as a transport to the departmental email server over which I have no control. We have someone who is still in the department but no longer on the dev team so I need to configure the transport agent to redirect all outgoing email (which would be coming from these applications) to the person that has taken their place. I added an entry in /etc/aliases like such: [email protected]: [email protected] But when I run /etc/init.d/sendmail newaliases I get the following error: /etc/mail/aliases: line 32: [email protected]... cannot alias non-local names So clearly I'm doing something I shouldn't. Is there a way to get aliases to work with non-local names or alternatively is their a way to accomplish my goal of redirecting outgoing mail for this user to another one? Technical Specs if the matter: Ubuntu 6.06 sendmail 8.13 (ubuntu provided package)

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  • Vim clobbering scrollback buffer outside of screen

    - by dotancohen
    If I'm not in a screen session, then when exiting Vim I get a bash prompt below the remnants of the VIM window. A side effect of this is that my scrollback buffer is clobbered, especially if I have paged through a long file in VIM. The problem only occurs if I'm not in screen, inside a screen window VIM exits to show the bash prompt and the previous lines just as before. I tried adding sett_ti=t_te= to my .vimrc to fix the problem, but the only effect that it has was to break VIM such that the problem occurs inside screen as well as outside. Thus, I removed the line. For good measure I do have altscreen on in .screenrc. This is on Ubuntu Server 12.04.1 LTS, with Bash 4.2.24, Screen 4.00, and VIM 7.3 (not vim-tiny), accessed over SSH in Cygwin version NT-6.1-WOW64 on a Windows 7 laptop. Thanks. EDIT: Note that in the same Cygwin install I can SSH into a different server (CentOS) and there VIM does not clobber the scrollback buffer. Therefore, I do not suspect a Cygwin issue. The CentOS machine does not have screen installed, and I did not have to add set t_ti= t_te= to .vimrc.

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  • Mod_rewrite on Alias directory

    - by crunchline
    I am moving from a WIMP setup to a WAMP setup. My images are on a separate drive. I need a default image served, when a file is not found. Currently it returns a 404 on images not found in the /images directory, and the 404.jpg is displayed for files not found on all the other directories. I tried changing [L] to [PT] but that did not do anything. in httpd.conf Alias /images "D:/images" in .htaccess RewriteCond %{REQUEST_FILENAME} !-s RewriteRule ^.*\.(gif|jpg|png)$ /404.jpg [L]

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  • Symlink path can be followed manually, but `cd` returns Permission denied

    - by Ricket
    I am trying to access the directory /usr/software/test/agnostic. There are several symlinks involved in this path. As you can see by the below transcript, I am unable to cd directly to the path, but I can check each step of the way and cd to the symlinked directories until I reach the destination. Why is this? (and how do I fix it?) Ubuntu 12.10, bash > ls /usr/software/test/agnostic ls: cannot access /usr/software/test/agnostic: Permission denied > cd /usr/software/test > cd agnostic bash: cd: agnostic: Permission denied > pwd -P /x/eng/localtest/arch/x86_64-redhat-rhel5 > ls -al | grep agnostic lrwxrwxrwx 1 root root 15 Oct 23 2007 agnostic -> noarch/agnostic > ls -al | grep noarch ... lrwxrwxrwx 1 root root 23 Oct 23 2007 noarch -> /x/eng/localtest/noarch > cd noarch > cd agnostic bash: cd: agnostic: Permission denied > ls -al | grep agnostic lrwxrwxrwx 1 5808 dip 4 Oct 5 2010 agnostic -> main > cd main > ls (correct output of `ls`) > pwd /usr/software/test/noarch/main > pwd -P /x/eng/localtest/noarch/main

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  • How to setup IP alias on bridged interface in Ubuntu

    - by Anonymouslemming
    How do I setup an IP alias on a bridge (br0) device on Ubuntu ? If I wait for br0 to come up and then do /sbin/ifconfig br0:0 192.168.10.1 netmask 255.255.255.0 then it works fine. If however I add the following to my /etc/network/interfaces file, it does not work and the network fails to start: auto br0:0 iface br0:0 inet static address 192.168.10.1 netmask 255.255.255.0 At the moment, I have a script in /etc/network/if-up.d/bridge_alias that does this as follows: #!/bin/bash if [ "${LOGICAL}" == "br0" ] && [ "${PHASE}" = "post-up" ]; then echo -n "Starting br0:0 ... " /sbin/ifconfig br0:0 192.168.10.2 netmask 255.255.255.0 echo "Done!" fi What is the right way of doing this though, just using the OS network config files ?

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  • Apache Alias - Chiliproject

    - by asdz
    I'm trying to setup Chiliproject (a ruby application for project management) I have setup my Apache already. However I want the Chiliproject to be like http://abc.com/Chiliproject as I want the abc.com to be used for other application. Following is my Chiliproject vhost setting: ServerName abc.com DocumentRoot /var/www/chiliproject/public Alias /chiliproject /var/www/chiliproject/public Options -MultiViews AllowOverride all When I go to abc.com, the Chiliproject page will appear but when I go to abc.com/chiliproject, I will reach the 404 page not found instead. If I change the DocumentRoot to /var/www, the page abc.com will be what I want, but the abc.com/chiliproject will comes to the 'Directory view' of my page.

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  • Ruby through RVM fails

    - by TheLQ
    In constant battle to install Ruby 1.9.2 on an RPM system (OS is based off of CentOS), I'm trying again with RVM. So once I install it, I then try to use it: [root@quackwall ~]# rvm use 1.9.2 Using /usr/local/rvm/gems/ruby-1.9.2-p136 [root@quackwall ~]# ruby bash: ruby: command not found [root@quackwall ~]# which ruby /usr/bin/which: no ruby in (/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin) Now that's interesting; rvm info says something completely different: [root@quackwall bin]# rvm info ruby-1.9.2-p136: system: uname: "Linux quackwall.highwow.lan 2.6.18-194.8.1.v5 #1 SMP Thu Jul 15 01:14:04 EDT 2010 i686 i686 i386 GNU/Linux" bash: "/bin/bash => GNU bash, version 3.2.25(1)-release (i686-redhat-linux-gnu)" zsh: " => not installed" rvm: version: "rvm 1.2.2 by Wayne E. Seguin ([email protected]) [http://rvm.beginrescueend.com/]" ruby: interpreter: "ruby" version: "1.9.2p136" date: "2010-12-25" platform: "i686-linux" patchlevel: "2010-12-25 revision 30365" full_version: "ruby 1.9.2p136 (2010-12-25 revision 30365) [i686-linux]" homes: gem: "/usr/local/rvm/gems/ruby-1.9.2-p136" ruby: "/usr/local/rvm/rubies/ruby-1.9.2-p136" binaries: ruby: "/usr/local/rvm/rubies/ruby-1.9.2-p136/bin/ruby" irb: "/usr/local/rvm/rubies/ruby-1.9.2-p136/bin/irb" gem: "/usr/local/rvm/rubies/ruby-1.9.2-p136/bin/gem" rake: "/usr/local/rvm/gems/ruby-1.9.2-p136/bin/rake" environment: PATH: "/usr/local/rvm/gems/ruby-1.9.2-p136/bin:/usr/local/rvm/gems/ruby-1.9.2-p136@global/bin:/usr/local/rvm/rubies/ruby-1.9.2-p136/bin:bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/usr/local/rvm/bin" GEM_HOME: "/usr/local/rvm/gems/ruby-1.9.2-p136" GEM_PATH: "/usr/local/rvm/gems/ruby-1.9.2-p136:/usr/local/rvm/gems/ruby-1.9.2-p136@global" MY_RUBY_HOME: "/usr/local/rvm/rubies/ruby-1.9.2-p136" IRBRC: "/usr/local/rvm/rubies/ruby-1.9.2-p136/.irbrc" RUBYOPT: "" gemset: "" So I have RVM that says one thing and bash which says another. Any suggestions on how to get this working?

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  • Magic function `bash ` not found

    - by inspectorG4dget
    I have a bunch of simulations that I want to run on a high-performance cluster, on which I should make reservations to get computing time. Since the reservations are bounded by time, I am developing an automation script that I can scp into the cluster and run. This script will then download the relevant simulation files, run them, and upload the results. Part of this automation script is in bash (cp, scp, etc) and the rest is in python. In order to develop this automation, I am using an IPython notebook. So far, I've coded all the python automation stuff in my IPython notebook and am trying to write the bash part of it now. However, it seems that the magic %%bash doesn't work in my IPython notebook. I get the following error when I have this code in my cell: Cell %%bash echo hi Error File "<ipython-input-22-62ec98e35224>", line 3 echo hi ^ SyntaxError: invalid syntax On a whim, I tried this: Cell %%bash print "hi" Error hi ERROR: Magic function `bash` not found. So I tried this with %%system, %%! and %%shell. But none of those work; they all give me the same error. Why is this happening? How can I fix this? Metadata: IPython 0.13.dev Python 2.7.1 Mac OS X Lion

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  • Externally disabling signals for a Linux program.

    - by Harry
    Hello, On Linux, is it possible to somehow disable signaling for programs externally... that is, without modifying their source code? Context: I'm calling a C (and also a Java) program from within a bash script on Linux. I don't want any interruptions for my bash script, and for the other programs that the script launches (as foreground processes). While I can use a... trap '' INT ... in my bash script to disable the Ctrl C signal, this works only when the program control happens to be in the bash code. That is, if I press Ctrl C while the C program is running, the C program gets interrupted and it exits! This C program is doing some critical operation because of which I don't want it be interrupted. I don't have access to the source code of this C program, so signal handling inside the C program is out of question. #!/bin/bash trap 'echo You pressed Ctrl C' INT # A C program to emulate a real-world, long-running program, # which I don't want to be interrupted, and for which I # don't have the source code! # # File: y.c # To build: gcc -o y y.c # # #include <stdio.h> # int main(int argc, char *argv[]) { # printf("Performing a critical operation...\n"); # for(;;); // Do nothing forever. # printf("Performing a critical operation... done.\n"); # } ./y Regards, /HS

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  • How to run bash script from windows using plink on linux

    - by user128877
    I'm trying to run a simple bat file from windows that will run a bash script on linux machine. The bash script is located on the linux machine. For example: I'm trying to run this bat file from windows plink.exe -pw <password> root@<ip> bash -c "/root/script.sh" Result: When running from windows the cmd is stuck forever when running the specific script (/root/script.sh) from the linux machine it's working just fine. The script contain ruby code and I'm using RVM

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  • have a bash script remotely shutdown another computer on the lan

    - by gletscher
    Hi I want to write a bash script that when called shuts down another computer on the lan. Maybe using ssh? The other computer is an ubuntu machine. Now I'm not sure how to send e.g. a sudo shutdown -h now command from withing a bash script to the ssh after logging in. Also I'm not sure how to obtain the rights for the sudo command, hence how to handle the communication between the server and client from within a bash script. Any suggestions are greatly appreciated.

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