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• Executing a command as apache

  - by Lord Loh.

  This script keeps outputting a 1. and I cannot understand why. <?php passthru("nohup sudo rndc reload sd.example.com",$op); print_r($op); ?> I have also tried the above code without the nohup. I have the following line in my sudoers file apache ALL = NOPASSWD: /usr/sbin/rndc reload sd.example.com Just to test, temporally, I allowed apache a shell, logged in as apache by sudo su apache and successfully managed to execute sudo rndc reload sd.example.com. I do not see any error message in my log files wither. What could I be possibly doing wrong? None of the similar threads have pointed me to anything that solved my problem or debug it.

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• How to configure in crontab with condition statement for checks

  - by chz

  We like to monitor the NAS storage mounted on a linux box. We only like to be notified via mail when the usage exceeds a certain number say 80. We have only seen in linux books where most of them are calling shell scripts at certain times. How do we write inside crontab to only mail us if it exceeds 80 ? Usual eg 2 2 * * * /home/someUser/script.sh 2&1 | mail [email protected] Looking for solution like below 2 2 * * * if [ someNumber "80" ] ; then /home/someUser/script.sh | mail [email protected] Sincerely

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• SSH disconnects active session after 20 minutes

  - by Paramaeleon

  I’ve just set up a new Linux box (OpenSuSE 12.3 on VmWare). Now I stated that my SSH shell sessions are disconnected exactly after 20 minutes, clearly with activity. (Putty: “Network error: Software caused connection abort”) I already set Putty to send keep alives every 64 sec. In sshd_config, I set ClientAliveInterval 50 ClientAliveCountMax 2 and did a deamon reload. Didn’t help. About two minutes after the link breakdown, ssh reports to /var/log/messages: … … sshd[…]: Timeout, client not responding. … … sshd[…]: pam_unix(sshd:session): session closed for user root I don’t encounter this behaviour when connecting to other virtual machines, so I guess the problem isn’t in the network. Any help is appreciated.

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• DD-WRT with both https and sshd running in port 443

  - by Bruno

  I have a buffalo router with dd-wrt v24 SP2. After setting up the basic stuff, I enabled the https access to the admin page. Several days later, while setting up remote ssh, I changed the default port from 22 to 443. And now..well :) You got the picture :) I can ssh the router but I have no web access to it's admin page. Before rushing to a cold-hearted configuration reset, is there any way to change the ssh port from a shell? Or make dd-wrt accessible thru basic http?

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• Looking for a way execute a task on all files in a directory (recursively) on Windows

  - by stzzz1

  I have a huge number of mp4 video files that needs to have a volume boost. I need a way to execute a ffmpeg audio filter on all files in a specified base directory (and in subdirectories as well). My problem is that I'm working on a Windows computer and I have no knowledge of its shell syntax. I would like to do the equivalent of what this bash script does : TARGET_FILES=$(find /path/to/dir -type f -name *.mp4) for f in $TARGET_FILES do ffmpeg -i $f -af 'volume=4.0' output.$f done I spent quite some time this afternoon looking for a solution but the recursive nature of what I need (that is so simple with find!) isn't too clear. Any help would be greatly appreciated!

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• Mongo Client RedHat EL5 UT8 Support

  - by Michael Irey

  # mongo MongoDB shell version: 1.6.4 Fri Mar 16 11:55:46 *** warning: spider monkey build without utf8 support. consider rebuilding with utf8 support connecting to: test Mongo Server seems to handle the utf8 characters fine, as well as my php-mongo-client driver. But when I try to query a record that has a utf8 character from the mongo command line client I get: > db.Users.find({age:33}); error:non ascii character detected Fri Mar 16 11:55:43 mongo got signal 11 (Segmentation fault), stack trace: Fri Mar 16 11:55:43 0x440b50 0x3664c302d0 0x3f47e7b6e0 0x3f47e83bbd 0x3f47e254f3 0x3f47e25660 0x3f47e256ee 0x3f47e25792 0x3f47e2876e 0x4b031d 0x443b72 0x445476 0x3664c1d994 0x43fd39 mongo(_Z12quitAbruptlyi+0x3b0) [0x440b50] /lib64/libc.so.6 [0x3664c302d0] /usr/lib64/libjs.so.1 [0x3f47e7b6e0] /usr/lib64/libjs.so.1(js_CompileTokenStream+0x3d) [0x3f47e83bbd] /usr/lib64/libjs.so.1 [0x3f47e254f3] /usr/lib64/libjs.so.1(JS_CompileUCScriptForPrincipals+0x60) [0x3f47e25660] /usr/lib64/libjs.so.1(JS_EvaluateUCScriptForPrincipals+0x3e) [0x3f47e256ee] /usr/lib64/libjs.so.1(JS_EvaluateUCScript+0x22) [0x3f47e25792] /usr/lib64/libjs.so.1(JS_EvaluateScript+0x6e) [0x3f47e2876e] mongo(_ZN5mongo7SMScope4execERKSsS2_bbbi+0xed) [0x4b031d] mongo(_Z5_mainiPPc+0x14a2) [0x443b72] mongo(main+0x26) [0x445476] /lib64/libc.so.6(__libc_start_main+0xf4) [0x3664c1d994] mongo(__gxx_personality_v0+0x269) [0x43fd39] Any ideas or suggestions would be welcome

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• Apache 2 Symbolic link not allowed or link target not accessible

  - by astropanic

  My apache server runs as user foo. I have some Rails applications in /home/foo/app1 /home/foo/app2. Each of them has an vhost <VirtualHost *:80> ServerName app1.foobar.com ServerAlias www.app1.foobar.com DocumentRoot /var/www/html/app1/current/public RailsEnv production <Directory /var/www/html/app1/current/public> AllowOverride all Options -MultiViews </Directory> </VirtualHost> I have a symlink in /var/www/html/app1 : current -> /home/foo/app1/tmp_20102611 All file permissons are set correctly (user foo group foo), I can go through the filesystem from shell. SELINUX is disabled Distro is CentOs 5.5 Which the above symlink I get an 403 and an error entry in error_log Symbolic link not allowed or link target not accessible:/var/www/html/app1/current When I symlink my app in the subdir of /var/www/html instead of /home/foo it works. How I can avoid this error still placing my app in my /home/foo directory ?

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• Roll standalone JBoss app under Tomcat

  - by Seva Alekseyev

  I've got a Linux box where there’s Tomcat running, with some JSP applications in it. Now, I’ve received a third party app from a developer shop to be eventually deployed. It came as an archive called "jboss7.tar" which, it seems, contained a whole standalone Web server. Once I’ve followed their instructions and run the designated shell script, it would start a server that would listen on port 8081, and app pages are being served up. Still, this strikes me as an inelegant setup. Why run two Web servers side by side, both of them Java-enabled? Also, the manual startup of the standalone app, I don't like that either. The real question is – can I take the user-provided portions from the said archive and somehow plug it under the existing Tomcat instance? It looks like the user code is packaged into files with .war extension, I can see them under /var/jboss7/standalone/deployments.

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• how to google a symbol keyword like "$?"

  - by ZhengZhiren

  i saw a trick in a book: in a linux shell, we can use &? to get the return value of a command. For example,we run a command,if it exit normally, the return value is 0. And then we type $?,we will get 0 in the screen. i want to google this kind of usage, so i have to type these two symbol $? in the search blank.But the search engine just return nothing to me... i have looked at the google help page, but still can't find a solution. so my question is: how can i search with this kind of keyword. or if you can give me some advise of the usage of $? or sort of thing, that will be also appreciated.

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• How do quotes/strings work in Powershell?

  - by Casey

  I'm have a command line that works in the regular old Windows Command Shell, but somehow gets misinterpreted in Powershell (I'm fairly new to Powershell). sqlcmd -S .\SQLEXPRESS -i "f:\SQLBackups\ExpressMaint.sql" -v DB="ksuite" -v OPTYPE="DB" -v BACKUPFOLDER="f:\SQLBackups" -v REPORTFOLDER="f:\SQLBackups\Reports" -v DBRETAINUNIT="days" -v DBRETAINVAL="7" Powershell seems to be stripping the drive letters out of the arguments that require paths. For example, I get the following when I attempt to run the above command in Powershell: Sqlcmd: ':\SQLBackups': Invalid argument. Enter '-?' for help. Well sure it's invalid without the drive letter. I have tried variations on double quoting it, escaping it, etc. but can't get it to work. What am I missing that Powershell does differently?

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• Windows Software to Save Arbitrary Application State

  - by ashes999

  VM software does a great job of saving state when you "turn it off," allowing instant and immediate return to that previous state. Is there some application for Windows that allows me to do the same thing, for any arbitrary software? It would allow me to save/restore state, possibly via a shell command or button that it appends to every window. Edit: For clarity, there are two types of apps: those that save their own states, and those that save others' states. Those that save their own state are like Chrome, which on load, reloads the windows you had open last time. That's not what I'm asking about; I'm asking for an app that can save the state of other apps, kind of like VM software does; but for any app. (A trivial test would be load notepad++, type a bunch of stuff, and save-state; on reset-state, you should be able to multi-level undo a lot of what you wrote, as if you never shut down the application.)

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• Preprocess outgoing email bodies with a linux smtp server/proxy?

  - by jdc0589

  I have an smtp server running locally on my server, and need to edit the contents of email bodies before they actually get sent out. I have tried using EmailRelay to proxy my smtp server with the --filter option to specify a filter/editing executable, but am getting some odd behavior. Currently, I specify an executable shell script as the filter program and all it is supposed to do is append some text to a log file and return 0 so I know it actually got called. The weird thing is the email gets sent but nothing shows up in my log file like it should (but it does when I run the script manualy). If I remove the 'exit 0' statement, the email does not send like I would expect. Are there any other options/suggestions?

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• My computer gets hosted when using 3G

  - by WeaklyTyped

  I recently activated 3G(UMTS) connection on my cellular network. I use Nokia S60 phone as a modem while connecting from Scientific Linux 6. While I am able to access net pretty well, the problem is my computer gets hosted. By using ip-address in a web-browser, anyone can access my localhost (running apache), this never happens with my wireline (ADSL) connection. Furthermore, even the Shell prompt changes from: [mach2@localhost ~]$ to [[email protected] ~]$ where XX.XX.XX.XX is the IP of the 3G connection. The very thought of putting my machine 'in the wild' is disconcerting. How can I rectify the situation without disabling services like apache, sshd and others?

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• Getting console2 to work nicely with UAC

  - by Merlyn Morgan-Graham

  I would like to get console2 to work nicely with UAC Particular problems I would like to tackle: If I start non-elevated, have a way to elevate while running. It'd be especially nice if I could elevate individual tabs I would like to get different coloring for admin/non-admin, similar to: this link. Basically, if I can get the console to execute a command on startup (similar to the HKLM\Software\Microsoft\Command Processor\AutoRun registry value), that's all I need How do I get this working? Would I have to modify source code to get this to work, or can I use different tab settings/do hacks w/ shell executables? I am using Windows 7, although I would imagine any working solution would also work on Vista.

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• perform command substitution in MS-DOS

  - by wiggin200

  I wonder how you can make in MS-DOS a command substitution Command substitution is a very powerful concept of the UNIX shell. It is used to insert the output of one command into a second command. E.g. with an assignment: $ today=$(date) # starts the "date" command, captures its output $ echo "$today" Mon Jul 26 13:16:02 MEST 2004 This can also be used with other commands besides assignments: $ echo "Today is $(date +%A), it's $(date +%H:%M)" Today is Monday, it's 13:21 This calls the date command two times, the first time to print the week-day, the second time for the current time. I need to know to do that in MS-DOS, (I already know that there is a way to perform something like that using as part of the for command, but this way is much more obfuscated and convoluted

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• After setting ulimit to unlimited, I am not able to login to machine

  - by user419534

  In one of requirment, I had to set ulimit on one of my machine to unlimited. For this I changed following in /etc/security/limits.conf as below # End of file oracle soft nofile unlimited oracle hard nofile unlimited oracle soft nproc 131072 oracle hard nproc 131072 oracle soft core unlimited oracle hard core unlimited oracle soft memlock 50000000 oracle hard memlock 50000000 * soft nofile unlimited * hard nofile unlimited and changed /etc/profile if [ $USER = "oracle" ]; then if [ $SHELL = "/bin/ksh" ]; then ulimit -p unlimited ulimit -n unlimited else ulimit -u unlimited -n unlimited fi fi I logged out. I am not able to connect ot machine at all. could you please someone help on this.

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• setup vim so that it searches the python path

  - by Dave

  I'm using vim as my primary editor with python files; I'd like to be able to easily open python files. As an example: I'm looking at a particular module A.py, in it I see the line import funkyModule, I want to edit that module so I just type in the command :pyed funkyModule and the pyed vim-command automatically finds the file funkyModule.py (or funkyModule/__init__.py) where ever it occurs on the python path. This capability is modeled on the capabilities if the ipython shell, where In [#]: edit funkyModule does what I've just described.

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• Applescript won't open applications on my external monitor

  - by jpadvo

  I'm trying to open a new MacVim window with Applescript, and have found partial success with this: do shell script "cd \"~/code/application\"; ~/bin/mvim > /dev/null 2>&1" This works fine, and opens a new MacVim window with it's working directory set to ~/code/application. BUT it always opens on the screen of my laptop, not on the external monitor with the currently active space where I am working. Is there a way to get MacVim to open in the current space? Edit: same problem with opening a finder window: tell application "Finder" to make new Finder window

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• Help updating cron entry using regular expressions

  - by Uday

  hi I am trying to update a cron entry NOT by using crontab -e but by shell commands. For example the cron entry is like this: 10 * * * * /home/localuser/foo.sh -b 1 -h 4 > foo_output.sh 2>&1 No i need edit the command line parameters part ONLY i.e -b 1 -h 4 to something else which will be coming in from the user. First thing would be to write the crontab to a tmp file and then manipulate that temp file. Now, is there an easy way to edit that line using SED or something? The crude way wud be to delete that entire line, write a new line with the entire expression and then load that into the cron. I am not very good with regular expressions. My system supports sed -i so was thinking this could be done in a single line command. Thanks in advance

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• Constantly visible notification and access icon for Empathy in Gnome 3

  - by aef

  Since a short while I'm using Ubuntu Oneiric Ocelot (11.10) with gnome-shell (Gnome 3) and I'm trying to get accustomed to the default Empathy Instant Messaging client. One mayor problem for me (coming from Gnome 2 and Psi) is that there is no constantly visible icon which makes it clear (for example by changing its icon or showing an animation) if there are incoming messages which I did not read already and which lets me jump into them with one click. Also I'm missing a way to bring up the contact list or hide it away with a click. I sometimes have real problems even figuring out how to even open the contact list up again. Is there a Gnome 3 extension or some other trick available to display such a notifier in the top bar? I'm talking about something just like the sound and network controls which are already located there. I know that there are notifications in the lower notification area (former system tray), but as it is only visible as I move the mouse in the lower right corner of the screen, its useless for me.

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• Real time audio streaming

  - by Josh K

  I have a remote computer running OS X. I would like to stream the audio from the microphone input over the network so I can listen to it. Primarily I want to do this because I'm out of the office but still need to communicate with people there. I would like to use VLC, but am not fully aware of the options available. I tried SoundFly (as recommended by another answer) but this didn't seem to want to connect. At this point I should note that I'm using a VPN network to connect to the remote computer (using Hamachi). I can open up ports / etc fine though, so I should be able to do this. Alright, I found Nicecase which does exactly what I want but I would prefer to not have to shell out $40 for it.

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• Backup Mongodb on EC2 through EBS snapshots - timing issue

  - by DmitrySemenov

  I'm following this guidance http://docs.mongodb.org/ecosystem/tutorial/backup-and-restore-mongodb-on-amazon-ec2/ I have 4 EBS 1000 IOPS volumes assigned to instance These 4 volumes through MDADM assembled into software RAID10 array. I want to do backups through EBS Snapshots as explained in the article above Question: Mongodb says - that I need to mongo shelldb.runCommand({fsync:1,lock:1}); -- this will lock the db for writing ....run snapshot creation... mongo shell db.$cmd.sys.unlock.findOne(); -- this will unlock the db for writing so do I need to unlock the DB for writing after I issued the comand ec2-create-snapshot or after it's finished and the actual snapshot is created thanks, Dmitry

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• disappearing emails

  - by Mike

  I have a few users (about 7 of 400) where their emails are disappearing intermittently on outlook, the emails are however still on OWA in the correct folders. After running the following Shell command in exchange and restarting outlook everything works fine again for about a week. [PS] C:\Windows\system32set-mailboxcalendarsettings [email protected] - AutomateProcessing:autoupdate Then for some odd reason AutoUpdate changes to AutoAccept and the problem starts again. They are all using office 2007 with SP3 but I suspect the problem is on exchange and not on the local machine. any help will be appreciated FrustratedMike

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• Customising Windows 8 Start Screen Tiles

  - by Joe Taylor

  We are looking for an effective way to manage the start screen in Windows 8. So far using WSIM we can add certain start tiles by using the OOBE System - shell setup - SquareTiles and WideTiles properties. However this only seems to work for square tiles and not wide tiles, if anyone has any insight on this it would eb appreciated. However the main question is has anyone managed to modify this screen using a GPO, we can add application shortcuts to the Start menu list on the All Apps page using a create shortcut to all users start menu policy. However as we occasionally deploy apps throughout the year in line with the courses requirements we would want to be able to put a shortcut on the home screen. Is it possible?

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• how to get a decent emacs setup on linux

  - by Hersheezy

  I am currently interested in switching from vim to emacs. One of the more compelling reasons for this is the smooth integration with a unix environment. The most experienced emacs users I have seen have a bash prompt at the bottom of their window, with stdout going to a buffer right above it. They then interact with the output of programs such as grep in interesting ways. I am on Ubuntu 10.04 and the default emacs environment does not seem to do much for me in the way of integration. For example, in the M-x shell mode, output from basic commands like ls produce lots of strange characters and hitting the up arrow does not go to previous commands. Any recommendations on a good direction to go in?

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