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• ssh, "Last Login", `last` and OS X

  - by allentown

  I have hit the googles as much as I can on this, being specific to OS X, I am not finding an answer. Nothing is wrong, but curiosity levels are high. $ssh [email protected] Password: Last login: Wed Apr 7 21:28:03 2010 from my-laptop.local ^lonely tylenol^ Line 1 is my command line 2 is the shell asking for the password line 3 is where my question comes from line 4 comes out of /etc/motd I can find nothing in ~/ of an of the .bash* files that contains the string "Last Login", and would like to alter it. It performs some type of hostname lookup, which I can not determine. If I ssh to another host: $ssh [email protected] Last login: Wed Apr 7 21:14:51 2010 from 123-234-321-123-some.cal.isp.net.example hi there, you are on box 456 line 1 is my command line 2 is again, where my question comes from line 3 is from /etc/motd *The dash'd IP address is not reversed On this remote host, I have ~/.ssh and it's corresponding keys set up, so there was no password request Where is the "Last Login:" coming from, where does the date stamp come from, and most importantly, where does the hostname come from? While on [email protected] (box 456) $echo hostname remote.location.example456.com Or with dig, to make sure I have rDNS/PTR set up, for which I am not authoritative, but my ISP has correctly set... $dig -x 123.234.321.123 PTR remote.location.example456.com or $dig PTR 123.321.234.123.in-addr.arpa. +short remote.location.example456.com. my previous hostname used to be 123-234-321-123-some.cal.isp.net.example, which I set with hostname -s remote.location.example456.com, because it was obnoxious to see such a long name. That solves the value of $echo hostname which now returns remote.location.example456.com. Mac OS X, 10.6 is this case, does seem to honor: touch ~/.hushlogin If leave that file empty, I get nothing on the shell when I login. I want to know what controls the host resolution of the IP, and how it is all working. For example, running last reports a huge list of my logins, which have obtusely long hostnames, when they would be preferable to just be remote.location.example456.com. More confusing to me, reading the man page for wtmp and lastlog, it looks like lastlog is not used on OS X, /var/log/lastlog does not exist. Actually, none of these exist on 10.5 or 10.6: /var/run/utmp The utmp file. /var/log/wtmp The wtmp file. /var/log/lastlog The lastlog file. If I am to assume that the system is doing some kind of reverse lookup, I certainly do not know what it is, as it is not an accurate one.

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• How to know from a bash script if the user abruptly closes ssh session

  - by Figo

  I have a bash script that acts as the default shell for a user loging in trough ssh. It provides a menu with several options one of wich is sending a file using netcat. The netcat of the embedded linux I'm using lacks the -w option, so if the user closes the ssh connection without ever sending the file, the netcat command waits forever. I need to know if the user abruptly closes the connection so the script can kill the netcat command and exit gracefully. Things I've tried so far: Trapping the SIGHUP: it is not issued. The only signal issued i could find is SIGCONT, but I don't think it's reliable and portable. Playing with the -t option of the read command to detect a closed stdin: this would work if not for a silly bug in the embedded read command (only times out on the first invocation)

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• Is `xargs -t` output stderr or stdout, and can you control it?

  - by Roy Rico

  say i have a directory with hi.txt and blah.txt and i execute the following command on a linux-ish command line ls *.* | xargs -t -i{} echo {} the output you will see is echo blah.txt blah.txt echo hi.txt hi.txt i'd like to redirect the stderr output (say 'echo blah.txt' fails...), leaving only the output from the xargs -t command written to std out, but it looks as if it's stderr as well. ls *.* | xargs -t -i{} echo {} 2> /dev/null Is there a way to control it, to make it output to stdout?

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• Selectively parsing log files using Java

  - by GPX

  I have to parse a big bunch of log files, which are in the following format. SOME SQL STATEMENT/QUERY DB20000I The SQL command completed successfully. SOME OTHER SQL STATEMENT/QUERY DB21034E The command was processed as an SQL statement because it was not a valid Command Line Processor command. EDIT 1: The first 3 lines (including a blank line) indicate an SQL statement executed successfully, while the next three show the statement and the exception it caused. darioo's reply below, suggesting the use of grep instead of Java, works beautifully for a single line SQL statement. EDIT 2: However, the SQL statement/query might not be a single line, necessarily. Sometimes it is a big CREATE PROCEDURE...END PROCEDURE block. Can this problem be overcome using only Unix commands too? Now I need to parse through the entire log file and pick all occurrences of the pair of (SQL statement + error) and write them in a separate file. Please show me how to do this!

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• Send the "ENTER" from a bash script

  - by Smat

  I am trying to create a bash script to simulate a mail attack to our mailserver. For this reason i want to create a bash script to send hundred of mails to our server, but when i launch the command: $telnet 192.168.12.1 25 <-- where 192.168.12.1 is the ip of our server The telnet session start and all the commands that i write later aren't executed. I also tried to create a second script to launch command on the telnet session after that this one are been created, but when i write from the second script: $echo -ne "EHLO domain.com\r\f" It print the command but doesn't do the ENTER so the command is not taken. Any idea?

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• how to debug VC++ program, input file not open while debuging

  - by zeedotcom

  i am using Visual studio 8. i pass command line argument to my program when i execute the program using exe file it works fine but when i use to debugg. it is unable to open the input file which i have given it in the form of command line argument. although i have given the command line argument in the Project-properties-debug-command line arguments.... e.g "program.exe" input_file output_file input file contains data which i have to use in the calculation if i am unable to debug it. how can i remove the errors in my program reply me thanks

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• OSX launchctl programmatically as root

  - by Lukas1

  I'm trying to start samba service using launchctl from OSX app as root, but I get error status -60031. I can run without problems the command in Terminal: sudo launchctl load -F /System/Library/LaunchDaemons/com.apple.AppleFileServer.plist` In the objective-c code, I'm using (I know it's deprecated, but that really shouldn't be the issue here) AuthorizationExecuteWithPrivileges method. Here's the code: NSString *command = @"launchctl"; // Conversion of NSArray args to char** args here (not relevant part of the code) OSStatus authStatus = AuthorizationCreate(NULL, kAuthorizationEmptyEnvironment, kAuthorizationFlagDefaults, &_authRef); if (authStatus != errAuthorizationSuccess) { NSLog(@"Failed to create application authorization: %d", (int)authStatus); return; } FILE* pipe = NULL; AuthorizationFlags flags = kAuthorizationFlagDefaults; AuthorizationItem right = {kAuthorizationRightExecute, 0, NULL, 0}; AuthorizationRights rights = {1, &right}; // Call AuthorizationCopyRights to determine or extend the allowable rights. OSStatus stat = AuthorizationCopyRights(_authRef, &rights, NULL, flags, NULL); if (stat != errAuthorizationSuccess) { NSLog(@"Copy Rights Unsuccessful: %d", (int)stat); return; } OSStatus status = AuthorizationExecuteWithPrivileges(_authRef, command.UTF8String, flags, args, &pipe); if (status != errAuthorizationSuccess) { NSLog(@"Error executing command %@ with status %d", command, status); } else { // some other stuff } I have also tried using different flags then kAuthorizationFlagDefaults, but that led to either the same problem or error code -60011 - invalid flags. What am I doing wrong here, please?

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• Django shell command to change a value in json data

  - by crozzfire

  I am a django newbie and i was playing around in django's manage.py shell. Here is something i am trying in the shell: >>> data [{'primary_program': False, 'id': 3684}, {'primary_program': True, 'id': 3685}] >>> data[0] {'primary_program': False, 'id': 3684} >>> data[1] {'primary_program': True, 'id': 3685} >>> data[0].values() [False, 3684] >>> data[1].values() [True, 3685] >>> How should i give a command here to update the value of primary_program in data[1] to False and keep the rest of the json the same?

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• Find out how many DNS Queries/month via WHM or SSH?

  - by Kerry

  Is it possible? We have complete control over our DNS server and the server actually being pointed to. We are interested in how many DNS Queries we are currently getting, as we want to move to Ultra DNS, but we need to know how many queries we're likely to get in a month. Is this possible to figure out? Do I need to start a service before tracking begins? Or use shell to access the data?

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• How to add quotes in visual basic? [on hold]

  - by Poistenec

  I'd like to ask how is it possible to add quotes in VB. I'm trying to run command which contains quotes.. example: Shell("cmd.exe") SendKeys.Send("cd "c:\users\abc def" ") <<<<--- this line SendKeys.Send("{ENTER}") there is an syntax error. the problem is that I need to add quotes to some commands as there is a space in folderpath. As a beginner in VB I'm not really sure how to describe the poblem correctly so I hope you can see the it in my example :/ Thank you all in advance

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• Running shell command in parallel on a cluster

  - by alex

  How do you execute a Unix shell command on a cluster in parallel (step 1) and collect the results back to a central node (step 2)

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• What does 'set -e' do, and why might it be considered dangerous?

  - by egorgry

  This question has appeared on a pre-interview quiz and it's making me crazy. Can anyone answer this and put me at ease? The quiz has no reference to a particular shell but the job description is for a unix sa. again the question is simply... What does 'set -e' do, and why might it be considered dangerous?

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• How to replace the char '[' etc with '\[' using "sed" in a file ?

  - by Abhijeet

  I have a file say "file.txt" with following contents: Capsule arr**[**0**]** in state A rate_ul/dl=**(**2000000/7000000**)** Capsule RBx**[**0**]** in state ... ... using sed operator how can i replace all occurences of '[' with '[', '(' with '(', ']' with ']' and so on. Capsule arr**\[**0**\]** in state A rate_ul/dl=**\(**2000000/7000000**\)** Capsule RBx**\[**0**\]** in state ... ... Using the substitue operator in "gvim" I am able to achieve the same result. ie. if i use ":1,$ s/\[/\\[/g" in the vi editor in command mode I see all the '[' chars replaced with '['. However if I try to use the same substitue command in a shell script using a sed command, i am not able to achieve the same result. ie If i use the following command in a shell script I am not able to achieve the desired result: sed "s/\[/\\[/g" $temp_file2 > $temp_file1 where $temp_file2 conatins the lines with '[' characters and $temp_file1 should contain the replaced '\[' chars

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• how to make PHP lists all Linux Users?

  - by Data-Base

  Hello I want to build a php based site that (automate) some commands on my Ubuntu Server first thing I did was going to the file (sudoers) and add the user www-data so I can execute php commands with root privileges! # running the web apps with root power!!! www-data ALL=(ALL) NOPASSWD: ALL then my PHP code was <?php $command = "cat /etc/passwd | cut -d\":\" -f1"; echo 'running the command: <b>'.$command."</b><br />"; echo exec($command); ?> it returns only one user (the last user) !!! how to make it return all users? thank you

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• Several ways to call a windows batch file from another one or from prompt. Which one in which case?

  - by dim

  A windows batch file (called.bat or called.cmd) can be called from another batch file (caller.bat or caller.cmd) or interactive cmd.exe prompt in several ways: direct call: called.bat using call command: call called.bat using cmd command: cmd /c called.bat using start command: start called.bat I'm quite in trouble to differentiate their intended usage based on their help text: when to use which one? e.g. why I might use 'call' command instead of direct call. What's different? I'm interested on some summary report that analyze all 4 possibilities (and others if any missing) from various point of views: recommended use cases for which they are designed to fit, process spawning, execution context, environment, return code processing. Note: I'm using Windows XP SP3.

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• Run a shell command from Django

  - by Badifunky

  Hello, I'm developing a web page in Django (using apache server) that needs to call a shell command to enable/dissable some daemons. I'm try to do it with os.system(service httpd restart 1>$HOME/out 2>$HOME/error) and this command doesn't return anything. Any idea how can i fix this?

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• How do I execute a shell-command in background?

  - by Adobe

  Here's a simple defun to run a shell script: (defun bk-konsoles () "Calls: bk-konsoles.bash" (interactive) (shell-command (concat (expand-file-name "~/its/plts/goodies/bk-konsoles.bash ") (if (buffer-file-name) (file-name-directory (buffer-file-name))) " &") nil nil)) If I start a program with no ampersand - it start the script, but blocks emacs until I close the program, if I don't put ampersand it gives error: /home/boris/its/plts/goodies/bk-konsoles.bash /home/boris/scl/geekgeek/: exited abnormally with code 1. Edit: So now I'm using: (defun bk-konsoles () "Calls: bk-konsoles.bash" (interactive) (shell-command (concat (expand-file-name "~/its/plts/goodies/bk-konsoles.bash ") (if (buffer-file-name) (file-name-directory (buffer-file-name))) " & disown") nil nil) (kill-buffer "*Shell Command Output*")) Edit 2: Nope - doesn't work: (defun bk-konsoles () "Calls: bk-konsoles.bash" (interactive) (let ((curDir default-directory)) ;; (shell-command (concat "nohup " (expand-file-name "~/its/plts/goodies/bk-konsoles.bash ") curDir) nil nil) (shell-command (concat (expand-file-name "~/its/plts/goodies/bk-konsoles.bash ") curDir "& disown") nil nil) (kill-buffer "*Shell Command Output*"))) keeps emacs busy - either with disown, or nohup. Here's a script I'm running if it might be of help: bk-konsoles.bash

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• How can invoke a shell to make a new environment to run a make inside another make?

  - by WilliamKF

  I would like in my GNUmakefile to have a target rule that invokes a new shell and then with the clean slate of the new shell invokes a new make. What is the syntax to do this? I tried this but it didn't work: .PHONY: setup setup: shell cd myDir; make; cd .. It gets infinite repeat of the following error: make[1]: Entering directory `/disk4/home/user/parent' shell cd myDir; make; cd .. /bin/sh: shell: command not found make[1]: Entering directory `/disk4/home/user/parent' shell cd myDir; make; cd .. /bin/sh: shell: command not found [...]

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• elisp: call command on current file

  - by Jasie

  Hello, I want to set a key in emacs to perform a shell command on the file in the buffer, and revert the buffer without prompting. The shell command is: p4 edit 'currentfilename.ext' (global-set-key [\C-E] (funcall 'revert-buffer 1 1 1)) ;; my attempt above to call revert-buffer with a non-nil ;; argument (ignoring the shell command for now) -- get an init error: ;; Error in init file: error: "Buffer does not seem to be associated with any file" Completely new to elisp. From the emacs manual, here is the definition of revert-buffer: Command: revert-buffer &optional ignore-auto noconfirm preserve-modes Thanks!

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• How to restart fvwm2 from the command line?

  - by Chris

  For a very specific software application, we maintain a base of machines running fvwm 2.5. To update the menu structure, the fvwm2rc default config file is replaced during the update process performed by a package management system. To enable the new menu structure after an update, the user has to manually perform an action: Restart machine, re-login, restart fvwm. The preferred action is to choose "Window Manager Restart Fvwm2" since no login is needed then and even the windows survive. Question: How can I invoke an equivalent action as "Restart Fvwm2" from the command line or the package management system? The following command does not work (neither do similar ones): fvwm -c "Restart" [FVWM][SetupICCCM2]: <<ERROR>> another ICCCM 2.0 compliant WM is running, try -replace "-replace" is no option since one needs to log in again after calling it.

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• OpenVPN - Ubuntu 10.04 - Client Can't Connect to Server - Linux Route Add Command Failed

  - by nicorellius

  I suppose this could be asked on Server Fault as well, but it is specific to the client so I thought I'd start here. I have keys for access to an OpenVPN server already in place. I have used these keys to connect already, but using a Windows XP machine. On a Ubuntu machine, I installed OpenVPN and then configured client.conf file so that I could run: sudo openvpn --config client.conf And it seems correct but I still can't connect and get these errors and lines of output: Mon May 31 14:34:57 2010 ERROR: Linux route add command failed: external program exited with error status: 7 Mon May 31 14:34:57 2010 /sbin/route add -net 10.8.0.1 netmask 255.255.255.255 gw 10.8.0.17 SIOCADDRT: File exists Mon May 31 14:34:57 2010 ERROR: Linux route add command failed: external program exited with error status: 7 Mon May 31 14:34:57 2010 Initialization Sequence Completed I searched the net for forums and ideas and tried some file moving and renaming but still ended up in the same place.

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• Dovecot: doveadm move command syntax

  - by vincent

  I want to transfer an email from [email protected] to put it in a folder of another user: [email protected] For that, it seems to me appropriate to use 'doveadm move' command, but I can not get the right result. Can you help me? syntax: doveadm move [-u |-A] [-S ] [user ] my attempts: doveadm move -u [email protected] DIRECTORY_2 mailbox [email protected]:'DIRECTORY_1' all return: Error: Syncing mailbox [email protected]:DOSSIER_1 failed: Mailbox doesn't exist: [email protected]:DOSSIER_1 doveadm -u [email protected] DIRECTORY_2 mailbox sdbox:/complete/path/[email protected]/mailboxes/DIRECTORY_1 all return: Error: Syncing mailbox sdbox:/complete/path/[email protected]/mailboxes/DIRECTORY_1 failed: Mailbox doesn't exist: sdbox:/complete/path/[email protected]/mailboxes/DIRECTORY_1 doveadm move -u [email protected] DIRECTORY_2 mailbox [email protected] 'DIRECTORY_2' all return: Fatal: Unknown argument DIRECTORY_2 some details: directory exists the following command works (in case 'DIRECTORY_1' and 'DIRECTORY_2' are in the [email protected] user): doveadm move -u [email protected] DIRECTORY_2 mailbox 'DIRECTORY_1' ALL my problem is that I can not put another user destination

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• Restored Domain Controller does not display any information using dcdiag command

  - by dasko

  I am testing restoring a domain controller from system state backup to different hardware in a non production environment as a sanity check for our restoration procedure. When i run the dcdiag command I get "blank info back" and all that is displayed are two lines as follows: Domain Controller Diagnosis Performing initial setup: and then I am returned to the command prompt. Even when I do dcdiag /v i get the same result. I have double checked the DNS settings and Active Directory works properly. All FSMO roles are being held by this restored Domain Controller. I am able to join test pc's to the domain without issue etc Is this a common issue or is there something that I am missing. Thanks.

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• What's the command to disbale stylesheets in vimperator?

  - by officespace

  What's the command to disable the stylesheet for the current web page with vimperator?

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• Pure-FTPd linux upload problems - 500 Unknown command

  - by user1801273

  I'm running Centos with Kloxo CP and PureFTPd on VPS based on HyperVM. The problem - during the day, there are periods when FTP wors fine for hours, but sometimes it dies with "500 Unknown command" code. for files larger than 2Kb. This is really weird - with files less than 2472-2484 bytes everything would work fine, but with bigger files ftp would start writing file, would drop on 2Kb and would return "500 Unknown command" . This happens on Passive AND/OR Active connections for any filetypes. Logs are showing like the file was uploaded successfully , but the speed nearby the action would be 0.3 -0.5 Kb , when normal operation would report 70-150Kb/s speeds. I do have some Iptables firewalls on both HyperVM host,and VPS , however these are static, and most of the time it works just fine. Any suggestions on where to look for a solution would be appreciated :)

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