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• Any way to program a system which automatically restores home / sql database

  - by Mirage

  I have made two shell scripts Script 1: It does all Home directory backups with name username_home_date.tar.gz Script 2: It does SQL backups of all sites every 3 hrs. username_databse_date.sql.gz Now currently if I want to restore the site, I have to copy the tar file to /home/username and then untar there with all the permissions as well and then manually import the database. Is there any way (for instance a program, system or script) that I can just select which backup I want to restore and do automatically? Maybe like a cPanel addon thing.

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• Grapher: Edit Equations Without GUI

  - by Nathan G.

  I'm trying to edit the equation of a Grapher file without opening the Grapher UI. I've gotten as far as knowing that I need a hex editor to do this. I can't, however, find my equation in that file to change it. Does anyone know how Grapher stores this information, and how to change it? My ultimate goal is to be able to change the file through the shell so I can open it and have Grapher show me my new equation (that was set with the CL). Thanks! I will set a bounty if necessary.

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• Is it possible to code on two different computers simultaneously?

  - by Muhammad

  I want to work with another programmer and I want the source code to be live in real-time on both of our screens. Is this possible on the Mac OS x or Linux? We're going to be using OS X but occasionally we might need to add an Ubuntu computer too. Is there a way I can do this using ssh, any shell based program, or even a good GUI? I thought Coda might be capable of this but it's not really working. Anyone ever do this? I'm not look for a git/svn/or any other version control system. This is more of a live coding session. :)

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• How to write to a file and, while the file is still being writen, read and parse its contents using

  - by Isabelle

  Hello. I'm actually trying to write a shell script that logs the output of a command to a file but, since the command takes a long time to complete (about 15 minutes), I would like to start parsing the output of the command (content of the file) before the command is completed, so I can send messages to the standard output (the user), like: 10% complete 45% complete and so on. Program steps Redirect command to a file: $(command) $FILE Start reading and parsing the output ($FILE) before the command is finished. I thought of using pararell programming, but I havent't got the hang of it. Any help you be appreciated. Best regards.

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• Syntax for piping varnish logs to rotatelogs

  - by jetboy

  Ubuntu 12.04 Server x64, Varnish 3.0.2 I'm trying to pipe varnishncsa's logs through Apache's rotatelogs, and running from the shell, things work fine: sudo varnishncsa -a -P /var/run/varnishncsa/varnishncsa.pid |/usr/sbin/rotatelogs /var/log/varnish/varnish.log.%Y%m%d%H 3600 creates a new logfile in /var/log/varnish, with rotation every hour (3600 seconds). However, I'm struggling to get things working the same way inside /etc/init.d/varnishncsa: PATH=/sbin:/bin:/usr/sbin:/usr/bin DAEMON=/usr/bin/$NAME PIDFILE=/var/run/$NAME/$NAME.pid LOGFILE=/var/log/varnish/varnishncsa.log USER=varnishlog DAEMON_OPTS="-a -P ${PIDFILE}" DAEMON_PIPE="|/usr/sbin/rotatelogs /var/log/varnish/varnish.log.%Y%m%d%H 3600" ... start_varnishncsa() { output=$(/bin/tempfile -s.varnish) log_daemon_msg "Starting $DESC" "$NAME" create_pid_directory if start-stop-daemon --start --verbose --pidfile ${PIDFILE} \ --chuid $USER --exec ${DAEMON} -- ${DAEMON_OPTS} \ > ${output} 2>&1; then log_end_msg 0 else log_end_msg 1 cat $output exit 1 fi rm $output } Where should I put DAEMON_PIPE in the above code? I've tried at the end of: if start-stop-daemon --start --verbose --pidfile ${PIDFILE} which is where additional command line parameters usually go, but it isn't creating a logfile.

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• Looking for Primos "name generation" code

  - by Greg E

  Anyone remember Primos ? It had a shell-level thing called "name generation" which was very useful. Eg. to rename a bunch of files from part1.suffix to part1.new.suffix2 you could say rename *.suffix =.+new.suffix2 That's a very simple example, it was quite powerful. The control characters were: =,==,^=,^==,+ Which meant approximately: match 1 filename component, match all remaining components, delete one component, delete all remaining, add a component. In conjunction with Primos wildcards you could do pretty much any useful file renaming/copying operation very conveniently. It was much better than Unix wildcards and name generation/iteration and I'd like to find it again and use it. Anyone seen it around ? Not much reference on the interweb: search "Primos name generation" and you get a few fragmentary hits. Thanks !

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• grep with after-context that does not contain a keyword

  - by ukasz

  I want to grep through logs, and gather a certain exception stacktrace but I want to only see those that do not contain certain keywords in --after-context. I do not know in which line in after-context the keyword is. Simple example - given this shell code: grep -A 2 A <<EOF A B C R A Z Z X EOF the output is: A B C -- A Z Z I'd like the output to be: A Z Z I want to exclude any match that has 'B' in after-context How do I do this? Using grep is not a requirement, though I only have access to coreutils and perl.

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• Privileged command as part of cronjob

  - by user42756

  Hi, I'm facing a weired problem on a unix-based machine. Here is the story: I have a personal username/password on a unix machine with limited privileges. Whenever I need to execute some commands I have to substitute user using the su command, then I execute it normally. Now, I need to add a cronjob that uses such privileged commands so I added the cronjob on the crontab of the user I substituted to in order to have access to these commands. Strangely, it turned out to me that these commands fail to run for some reason as a cronjob although when I execute them directly from shell (after su) they work seamlessly. Why does this happen? Why do these commands not work as part of cronjobs? Thank you

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• Migrating users and mailboxes from postfix / Maildir to Postfix with Mysql backend [closed]

  - by Chrispy

  Possible Duplicate: Migrating users and mailboxes from postfix / Maildir to Postfix with Mysql backend So I've got 60 or so users on a hand rolled postfix installation on openbsd and I'd like to move their mailboxes to our new mail server running iRedMail (postfix, vmail/mysql back end) Does anyone know of a good way to do this? Preferably a script I can run to keep syncing the users mailboxes as MX records get updated? I presume one way (though I don't have all their passwords!) would be to have a command line imap client that simulated the users copying their mail themselves but I'm sure there must be a shell / php script to migrate users? Anyone got any bright ideas? Chris.

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• ssh freezes when trying to connect to some hosts

  - by NS Gopikrishnan

  When I try to ssh to particular machine/s in a list, The SSH command happens to be freezing. I tried out setting ssh timeout. But then also it's freezes even after the timeout. In verbose mode : OpenSSH_3.9p1, OpenSSL 0.9.7a Feb 19 2003 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug1: Connecting to x358.x.server.com [10.x.x.x] port 22. debug1: fd 3 clearing O_NONBLOCK debug1: Connection established. debug1: identity file /export/home/sqlrpt/.ssh/identity type -1 debug1: identity file /export/home/sqlrpt/.ssh/id_rsa type -1 debug1: identity file /export/home/sqlrpt/.ssh/id_dsa type 2 At this point it freezes. A work around I thought was to create a child process for each ssh calls and if the process doesn't respond after a timeout - Kill it. But are there any less complex ways, so that I can accommodate it in a shell script itself rather than going for a C/C++ program ?

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• Timeout ssh sessions after inactivity?

  - by Insyte

  PCI requirement 8.5.15 states: "If a session has been idle for more than 15 minutes, require the user to re-enter the password to re-activate the terminal." The first, and most obvious, way to deal with ssh sessions that are idling at the bash prompt is by enforcing a read-only, global $TMOUT of 900. Unfortunately, that only covers sessions sitting at the bash prompt. The spirit of the PCI spec would also require killing sessions running top/vim/etc. I've considered writing a */1 cron job that parses the output of "/usr/bin/w" and kills the associated shell, but that seems like a blunt instrument. Any ideas for something that would actually do what the spec requires and just lock the terminal? I've looked at away and vlock; they both seem great for voluntarily locking your terminal, but I need a cron/daemon task that will enforce locking.

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• Comparison of Unix shells

  - by Andy White

  Of the major Unix shells (bash, ksh, tcsh, zsh, others?), are there any compelling reasons to use one over another? Which is the most interactive/command-line friendly? Which is the most conducive/intuitive for writing scripts? Are there any major built-in features that one shell offers that others don't? Are any of these shells really good for one type of function, but not another? Or are they all pretty well-rounded/flexible? Is it just a matter of personal preference? I can make this community wiki if anyone prefers.

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• determine the archetecture of a mac from the command line or script?

  - by Brian Postow

  I'm writing a shell script, and I need to know the archetecture, ie PPC or Intel. Back in the day, there was a program /bin/arch that told you, but my mac doesn't seem to have it... Is there an easy way I can do this? Grep for something in a logfile? call some other program that spits that out as a side effect? It would be nice to know what OS Version I'm running too, but that may not be necessary. thanks

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• Need help creating a batch file to replace "." with "-"

  - by Brandon Ogle

  Like the title says, I need help creating a batch file to replace "." with "-", however I need to perserve the file extensions and it needs to work through the subfolders. I found another post on here that got the effect I wanted but it also swapped the . in my file extensions. I am a completely ignorant regarding shell script so please be detailed in your response. I have no idea what any of the switches mean or even how to specify the path for that matter. Thanks!

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• Stream tar.gz file from FTP server

  - by linker

  Here is the situation: I have a tar.gz file on a FTP server which can contain an arbitrary number of files. Now what I'm trying to accomplish is have this file streamed and uploaded to HDFS through a Hadoop job. The fact that it's Hadoop is not important, in the end what I need to do is write some shell script that would take this file form ftp with wget and write the output to a stream. The reason why I really need to use streams is that there will be a large number of these files, and each file will be huge. It's fairly easy to do if I have a gzipped file and I'm doing something like this: wget -O - "ftp://${user}:${pass}@${host}/$file" | zcat But I'm not even sure if this is possible for a tar.gz file, especially since there are mutliple files in the archive. I'm a bit confused on what direction to take for this, any help would be greatly appreciated.

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• Determine the architecture of a Mac from the command line or script?

  - by Brian Postow

  I'm writing a shell script, and I need to know the archetecture, ie PPC or Intel. Back in the day, there was a program /bin/arch that told you, but my mac doesn't seem to have it... Is there an easy way I can do this? Grep for something in a logfile? call some other program that spits that out as a side effect? It would be nice to know what OS Version I'm running too, but that may not be necessary. thanks

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• Pop current directory until specific file is found

  - by edarroyo

  I'm interested in writing a script with the following behavior: See if a file, build.xml, exists in the current directory, if so run a command supplied through arguments to the script. If not, pop the current directory and look at the parent. Go to 1. The script would end once we find the file or we reach the root. Also, once the script finishes and control comes back to the user I want the current directory to be that one where the script was initially l I'm not very familiar with shell scripting but any help/guidance will be much appreciated.

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• How to run a command in a process that is not a child of the current process?

  - by amicitas

  I am having a library conflict issue with calling an external program from within a interpreted programming environment (IDL). The issue seems to be that since the program I am calling ends up as a child of IDL, libraries are not being reloaded. From within IDL I can launch sub-processes either directly or using a shell. Is there a good way that I can cause my program to be run without ending up as a child process? The only solution I have found so far is to use ssh localhost my_program. This works perfectly but I would like a more direct solution.

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• Different behaviour of script locally and over ssh

  - by neorg

  I have a script on a server-A Script-A #!/bin/bash -l echo "script-A.sh" | change-environment.sh When I ssh onto server-A and execute it, it works fine. However, when I ssh user@server-A ./script-A.sh Script-A executes, but throws an undefined variable error in change-environment.sh. change-environment.sh runs in the c shell(I have no control over the script so the method I have used is about the only way I can use it), but everything else is in bash. Had found a similar question at I can run a script locally, but cannot do "ssh HOSTNAME /path/to/script.sh". However, there was no solution to the issue and it was a year old.

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• Use alias source with relative path

  - by notme

  I want to add an alias file to my project folder to quickly open and edit files in it with a simple shell command. To make it more portable, I would like to use only relative paths. I want something like this: ### .profile source /my/project/folder/aliases.bash and ### aliases.bash editprojectfiles="edit [/my/project/folder/]afile.txt" The problem for me now is how to retrieve [/my/project/folder/] automatically. I tried to use $PWD variable, but the result is that the alias points to the folder of .profile file and not the aliases.bash ones. Is there a way to get this?

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• Xubuntu 12.04: Slow Login

  - by naxchange

  I'm running Xubuntu 12.04, and after I ran the update, my login started slowing down big time. I've dabbled a little bit with the programs in Settings - Settings Manager - Session and Startup, and tried closing and opening these programs, and then rebooting. Anyways, I narrowed it down to a combination of 2 processes, "Network" (the connection manager) and "Xfce Volume Daemon". Their corresponding terminal commands are: ~$ nm-applet ~$ xfce4-volumed If I disable them, and then run them after login is complete, everything works just fine. Is there a way for me to run these commands automatically at start up? I want to maybe write a shell script and save it somewhere, or at least edit the order things happen after login, so the desktop can load before these processes. Hope I've been clear enough, and thanks in advance! NAX

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• PySide Qt script doesn't launch from Spyder but works from shell

  - by Maxim Zaslavsky

  I have a weird bug in my project that uses PySide for its Qt GUI, and in response I'm trying to test with simpler code that sets up the environment. Here is the code I am testing with: http://stackoverflow.com/a/6906552/130164 When I launch that from my shell (python test.py), it works perfectly. However, when I run that script in Spyder, I get the following error: Traceback (most recent call last): File "/home/test/Desktop/test/test.py", line 31, in <module> app = QtGui.QApplication(sys.argv) RuntimeError: A QApplication instance already exists. If it helps, I also get the following warning: /usr/lib/pymodules/python2.6/matplotlib/__init__.py:835: UserWarning: This call to matplotlib.use() has no effect because the the backend has already been chosen; matplotlib.use() must be called *before* pylab, matplotlib.pyplot, or matplotlib.backends is imported for the first time. Why does that code work when launched from my shell but not from Spyder? Update: Mata answered that the problem happens because Spyder uses Qt, which makes sense. For now, I've set up execution in Spyder using the "Execute in an external system terminal" option, which doesn't cause errors but doesn't allow debugging, either. Does Spyder have any built-in workarounds to this?

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• select failing with C program but not shell

  - by Gary

  So I have a parent and child process, and the parent can read output from the child and send to the input of the child. So far, everything has been working fine with shell scripts, testing commands which input and output data. I just tested with a simple C program and couldn't get it to work. Here's the C program: #include <stdio.h> int main( void ) { char stuff[80]; printf("Enter some stuff:\n"); scanf("%s", stuff); return 0; } The problem with with the C program is that my select fails to read from the child fd and hence the program cannot finish. Here's the bit that does the select.. //wait till child is ready fd_set set; struct timeval timeout; FD_ZERO( &set ); // initialize fd set FD_SET( PARENT_READ, &set ); // add child in to set timeout.tv_sec = 3; timeout.tv_usec = 0; int r = select(FD_SETSIZE, &set, NULL, NULL, &timeout); if( r < 1 ) { // we didn't get any input exit(1); } Does anyone have any idea why this would happen with the C program and not a shell one? Thanks!

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• Processing a log to fix a malformed IP address ?.?.?.x

  - by skymook

  I would like to replace the first character 'x' with the number '7' on every line of a log file using a shell script. Example of the log file: 216.129.119.x [01/Mar/2010:00:25:20 +0100] "GET /etc/.... 74.131.77.x [01/Mar/2010:00:25:37 +0100] "GET /etc/.... 222.168.17.x [01/Mar/2010:00:27:10 +0100] "GET /etc/.... My humble beginnings... #!/bin/bash echo Starting script... cd /Users/me/logs/ gzip -d /Users/me/logs/access.log.gz echo Files unzipped... echo I'm totally lost here to process the log file and save it back to hd... exit 0 Why is the log file IP malformed like this? My web provider (1and1) has decide not to store IP address, so they have replaced the last number with the character 'x'. They told me it was a new requirement by 'law'. I personally think that is bs, but that would take us off topic. I want to process these log files with AWstats, so I need an IP address that is not malformed. I want to replace the x with a 7, like so: 216.129.119.7 [01/Mar/2010:00:25:20 +0100] "GET /etc/.... 74.131.77.7 [01/Mar/2010:00:25:37 +0100] "GET /etc/.... 222.168.17.7 [01/Mar/2010:00:27:10 +0100] "GET /etc/.... Not perfect I know, but least I can process the files, and I can still gain a lot of useful information like country, number of visitors, etc. The log files are 200MB each, so I thought that a shell script is the way to go because I can do that rapidly on my Macbook Pro locally. Unfortunately, I know very little about shell scripting, and my javascript skills are not going to cut it this time. I appreciate your help.

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• What's a good way to write batch scripts in C#?

  - by Scott Bilas

  I would like to write simple scripts in C#. Stuff I would normally use .bat or 4NT .btm files for. Copying files, parsing text, asking user input, and so on. Fairly simple but doing this stuff right in a batch file is really hard (no exceptions for example). I'm familiar with command line "scripting" wrappers like AxScript so that gets me part of the way there. What I'm missing is the easy file-manipulation framework. I want to be able to do cd(".."), copy(srcFile, destFile) type functionality. Tools I have tried: NANT, which we use in our build process. Not a good scripting tool. Insanely verbose XML syntax and to add a simple function you must write an extension assembly. Can't do it inline. PowerShell. Looks great, but I just haven't been able to switch over to this as my primary shell. Too many differences from 4NT. Whatever I do needs to run from an ordinary command prompt and not require a special shell to run it through. Can PowerShell be used as a script executor? Perl/Python/Ruby. Really hate learning an entirely new language and framework just to do batch file operations. Haven't been able to dedicate the time I need to do this. Plus, we're a 99% .NET shop for our toolchain and I really want to leverage our existing experience and codebase. Are there frameworks out there that are trying to solve this problem of "make a batch file in C#" that you have used? I want the power of C#/.NET with the immediate-mode type functionality of a typical cmd.exe shell language. Am I alone in wanting something like this?

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