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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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  • Creating a link to name changing directory

    - by groove1534
    I have an Ubuntu 12.04 installed using wubi + Win7. I'm trying to create a link to "my documents" directory which located in my C drive: C:\Users\Myuser\My Documents\ Since the Ubuntu is installed in D:\, which is the "host", my C drive is accessible via /media/some_changing_hex. This hex get changed each time I restart my machine. So I need, somehow, to create a link that uses regex OR a link that somehow gets the the first (in this case - only) subdirectory in /media (something like all_subdirectories[0]). So how do I do that?

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  • The script not working as expected files dump path

    - by user3319390
    I have a script needs to be dump matching cname from my file contains and then matching scode to dump file to $cname/$year/$month/$day/ into files like access and error logs #!/bin/sh #base_dir="/home/vizion/Desktop" path="/home/vizion/Desktop/adn_DF9D_20140515_0005.log" name=$(basename "$path" ".log") for x in *.log; do year=${x:9:4}; month=${x:13:2}; day=${x:15:2}; done while read -r line do cname=$(echo ${line} | awk '{split($7,c,"/"); print c[3]}') scode=$(echo ${line} | awk -F"[ ]" '{print $9}') [[ ! -d "$cname/$year/$month/$day" ]] && mkdir -p "$cname/$year/$month/$day/" [[ ( ${scode} -ge 200 ) && ( ${scode} -le 399 ) ]] && { # [[ ! -d "$cname/$year/$month/$day" ]] && mkdir -p "$cname/$year/$month/$day/" echo ${line} >> /home/vizion/Desktop/$cname/$year/$month/$day/${cname}_${name}_access.log } [[ ( ${scode} -ge 400 ) && ( ${scode} -le 599 ) ]] && { [[ ! -d "$cname/$year/$month/$day" ]] && mkdir -p "$cname/$year/$month/$day" echo ${line} >> ${cname}_${name}_error.log } done < $path i am able to filter logs but not not dumping the exact location It's going other locations suggest to me correction in script

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  • pam_ldap.so before pam_unix.so? Is it ever possible?

    - by user1075993
    we have a couple of servers with PAM+LDAP. The configuration is standard (see http://arthurdejong.org/nss-pam-ldapd/setup or http://wiki.debian.org/LDAP/PAM). For example, /etc/pam.d/common-auth contains: auth sufficient pam_unix.so nullok_secure auth requisite pam_succeed_if.so uid >= 1000 quiet auth sufficient pam_ldap.so use_first_pass auth requiered pam_deny.so And, of course, it works for both ldap and local users. But every login goes first to pam_unix.so, fails, and only then tries pam_ldap.so successfully. As a result, we have a well-known failure message for every single ldap user login: pam_unix(<some_service>:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=<some_host> user=<some_user> I have up to 60000 of such log messages per day and I want to change the configuration so, that PAM will try ldap authentication first, and only if it fails - try pam_unix.so (I think it can improve the i/o performance of the server). But if I change common-auth to the following: auth sufficient pam_ldap.so use_first_pass auth sufficient pam_unix.so nullok_secure auth requiered pam_deny.so Then I simply can't login anymore with local (non-ldap) user (e.g., via ssh). Does somebody knows the right configuration? Why Debian and nss-pam-ldapd have pam_unix.so at first by default? Is there really no way to change it? Thank you in advance. P.S. I don't want to disable logs, but want to set ldap authentication on the first place.

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  • Sed: Deleting all content matching a pattern

    - by Svish
    I have some plist files on mac os x that I would like to shrink. They have a lot of <dict> with <key> and values. One of these keys is a thumbnail which has a <data> value with base64 encoded binary (I think). I would like to remove this key and value. I was thinking this could maybe be done by sed, but I don't really know how to use it and it seems like sed only works on a line-by-line basis? Either way I was hoping someone could help me out. In the file I would like to delete everything that matches the following pattern or something close to that: <key>Thumbnail<\/key>[^<]*<\/data> In the file it looks like this: // Other keys and values <key>Thumbnail</key> <data> TU0AKgAAOEi25Pqx3/ip2fak0vOdzPCVxu2RweuPv+mLu+mIt+aGtuaEtOSB ... dCBBcHBsZSBDb21wdXRlciwgSW5jLiwgMjAwNQAAAAA= </data> // Other keys and values Anyone know how I could do this? Also, if there are any better tools that I can use in the terminal to do this, I would like to know about that as well :)

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  • Display CPU usage separately (without root privileges)

    - by synaptik
    I need to display the CPU usage for each processing core on a single shared-memory 12-core (SMP) machine. I don't have access to install htop, else I would simply use that. I don't need fancy graphs or meters, though they would be nice. For example, simply displaying: X X X X X X X X X X X X where each X is the percentage utilization of 1 of the 12 processing cores on my machine. FYI: I know I can simply look at the utilization in "top" and divide that number by the number of cores on my machine, but I prefer a solution that shows each core separately.

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  • How to deal with ssh's "WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!"?

    - by Vi.
    I often need to login to multiple remote stations that are just placed to the same static IPs for me. SSH complains about changed keys in this case: $ ssh [email protected] @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ ... Offending RSA key in /home/vi/.ssh/known_hosts:70 ... I usually just run vim /home/vi/.ssh/known_hosts +70, dd wq and re-run the SSH command. How to do it simpler? Requirements: The warning should be displayed, and not like this: The authenticity of host '172.1.2.3 (172.1.2.3)' can't be established. It is easy to accept the key change. I expect something like this: $ ssh [email protected] @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ ... The fingerprint for the RSA key sent by the remote host is 82:cd:be:7a:ae:1b:91:2c:23:c1:74:4d:8a:38:10:32. Change the host key in /home/vi/.ssh/known_hosts (yes/no)? yes Warning: Changed host key for '172.1.2.3' (RSA) in the list of known hosts. [email protected]'s password: Simple and differs from usual "The authenticity of host can't be established." message.

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  • locale: What is the LANGUAGE variable used for? (and when?)

    - by seya
    I am trying to understand the locales used in Linux. On my Ubuntu 11.10 system locale puts out the following: LANG=en_DK.UTF-8 LANGUAGE=en_GB:en LC_CTYPE=en_GB.UTF-8 LC_NUMERIC="en_DK.UTF-8" LC_TIME="en_DK.UTF-8" LC_COLLATE=en_GB.UTF-8 LC_MONETARY="en_DK.UTF-8" LC_MESSAGES=en_GB.UTF-8 LC_PAPER="en_DK.UTF-8" LC_NAME="en_DK.UTF-8" LC_ADDRESS="en_DK.UTF-8" LC_TELEPHONE="en_DK.UTF-8" LC_MEASUREMENT="en_DK.UTF-8" LC_IDENTIFICATION="en_DK.UTF-8" LC_ALL= (en_dk is for using international day format, continental European number formatting (1.234,56) etc.) I think I understand what the LC_* family does, that LANG is the fallback if one of them is not set and that LC_ALL sets all of the LC_* variables to its value. What I don't know yet, is what LANGUAGE is used for. The notation en_GB:en reminds me of the Accept-Language HTTP header. With the settings above it would mean, British English is used, if a translation for it exists. Otherwise any existing English translation (en_US, en_AU, ..., whatever) would be used. Am I right so far? Also what programs actually obey the LANGUAGE setting? In how far is it different from LC_MESSAGES? Unfortunately, man locale only documents the LC_* family. And searching the web for 'linux locale LANGUAGE' or similar is a mute point. (Of course language is a word often used when talking about locales, and it may also be shown just in the output of locale without being discussed). Does anybody of you can help me out there?

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  • Solaris 11 installed, no updates?

    - by Paul De Niro
    I was messing around with solaris and decided to give Solaris 11 a try so I downloaded it from the Oracle website. After installing the OS, I went into the package manager and did an update. It told me that there were to available updates! I find this hard to believe considering that it's running a vulnerable version of firefox and java, its own in-house software product! Many of the other software products that came with the default install are also out of date and vulnerable. Is this normal for an Oracle install, or did I do something wrong with the upgrade process? I typed "pkg update" at the prompt, and I noticed that it did call out to pkg.oracle.com looking for updates. I find it bizarre that there are no updates available for an OS that was released a couple months ago with vulnerable software...

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  • DHCP server can't see other machines

    - by William
    Hi, I setup a private network from virtual machines and one of the machines is the DHCP server for the group. I want to specify a next-server for the DHCP server but I'm having trouble connecting to any of the machines that I lease IPs to. I'm just trying to do a simple ping/ssh to 10.0.0.252 (a machine with a lease) but it doesn't seem to respond. Any advice? I'm assuming I need to be able to connect to my next-server but maybe I'm wrong. Thanks.

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  • Setting a mail server without root?

    - by Legend
    Is it possible to setup a mail server on a Linux machine without root permissions? I want to be able to create two aliases for a given mail ID. But if I remember correctly, it is no possible to do this without root privileges because I need to edit the configuration file and then restart the mail server. Does anyone have a suggestion to get around this problem?

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  • Virtual Machine for software renting service

    - by Vilis
    I am currently trying to figure out which solution would be best for software renting service (with proper licensing and stuff). I know its kinda stupid and so on, but I just have to develop it. Long story short - user can connect to a virtual machine (with windows guest os) using vnc and use some specific software for some specific time (eg., 1 hour). I have already considered VirtualBox, Xen and some other, but maybe somebody has a better idea. Thanks.

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  • Autosaving on emacs or xemacs files (preferably on loss of focus)

    - by Spencer
    Ideally I want to replicate with emacs functionality from TextMate, whereby on loss of focus i.e. I click away from the buffer, my file saves. If this isn't possible, I want to customize emacs so that it will autosave the file for every character I write. When I say this I don't mean I want to autosave to the ~ backup files. I want to save the file I am currently working on. I am working on a Fedora VM. Note I am not looking for a backup or autosave. I want the file I am actually in to save, so that if I loaded the html file I am editing in a web browser it would reflect my new changes without me having to explicitly change it.

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  • Network connection on Linux

    - by Kevin
    A general question about network connection on Linux : once a network connection goes into time_wait, is it still tied to the process ? Does it still use resources like say filehandle ? Reason I ask is because once it goes into time_wait, lsof does not report it anymore. I guess that means that the network connection is no longer tied to the process and hence does not count against filehandle limit. Would like to confirm though.

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  • Timestamp Updating Constantly on /dev/null

    - by motorleague
    I've been working on a problem with a /dev/null file on an AIX system (just for background it looks as though it was inadvertently deleted and recreated as a normal file by somebody), but in trying to determine what caused the problem, I noticed that the timestamp on it seems to update every minute. I've observed this on several AIX servers at my workplace. At present I can't entirely rule out this be something specific to the Application being used at my workplace, so I compared with CentOS and Debian based computers at home last night. The CentOS box, which runs 24 hours, had a mod time on /dev/null of around 4 days ago (during which time it was essentially just being used as a web browser and multimedia player, although it would have had active but essentially unused Apache, MySQL and VMM processes running in the background). The timestamp on /dev/null on the Debian machine, which was a just booted laptop, pretty much reflected the boot time, but I tested redirecting STDIN from, and STDOUT to it, and the modification time was unchanged (I'm not sure 100% sure if directing data to /dev/null constitutes "writing to it" in the way it would a normal file). So my question is essentially, could anybody please offer any advice with regards to what circumstances (permissions changes etc.. aside) might cause the timestamp on /dev/null to update? Thanks very much for any suggestions. Alex.

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  • How do I get Apache 2 to read this directory?

    - by Mike
    I'm on Mac OSX and i I have apache2 installed via MacPorts, running as the _www user. I have some files I want to serve in the /Users/Me/Documents/abc folder. Right now, though, the permissions of /Users/Me/Documents are 700. So, _www can't get in, even if abc is chmod 777. I recognize the following options: Allow _www access to my Documents folder. Put the files I want to share outside of my Documents folder. Hard-link the files outside of my Documents folder, and point apache to the hard links. None of these solutions are acceptable to me, however. I don't feel safe allowing _www access to my entire Documents folder. I really want to keep the files in my Documents folder for other reasons. The files are changing all the time, so hard-linking would not always reflect the right file structure, and, as I understand it, you can't hard-link a directory (though, if you could, that would solve it). Any ideas for a solution? Is there a way to run a few httpd processes as my user account so it can get in there? Or, is there some way to hard-link a directory, or some way to get httpd to follow a symlink past a directory that is 700 not owned by _www? Thanks!

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  • How to batch edit a list of files?

    - by user43144
    I have a list of files where I need to remove some lines that have been added yesterday by a spambot. The section I want to remove looks like this: ^M <script>[...] bunch of malware code [...]</script> That section seems to have been appended to the files, so I can be relatively sure it's the last lines of each file that contain this part. Now I know a bit of Linux, but not enough to do this via a command. How would I go about and do this?

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  • How to avoid duplicates when copying files that have been renamed at the destination

    - by Benoitt
    I have to get pictures from a folder – with subfolders which are updated automatically – with their extensions. These files have to be copied in a folder where a website based on PHP will edit them (by renaming and creating an XML file) to be downloadable and integrated in an XML feed. Because of the rename function of the script, when I perform the copy gain, all the files are duplicated, because the script has renamed the original ones already. I've tried a few things with rsync but I'm looking for something more powerful because I can't copy files with an external "history". #!/bin/bash find '/home/name/picture' -name '*.jpg' | while read FILE ; do rsync --backup --backup-dir=incremental --suffix=.old "$FILE" /var/www/media ; done wget --spider 'http://myscript.php' ; #exit 0 PS: As a little addition, I'd like to replace '.' with a 'space' just after the *.jpeg copy. My PHP script has some problem to define files with comma because of the extension. I'm finking about a command with find – like I did before – with a sed function? Is that a good idea?

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  • Started an application through SSH, command line now gone, what happens next?

    - by Chris Dutrow
    Context: This is a very basic question Using Putty and SSH for the first time to do some serious server setup and run into the situation where I have started a process that I do not want to stop. The process is the gunicorn WSGI HTTP Server (running on Centos 6.3). The command I used to start the process is (as per their Quick Start): gunicorn -w 4 myapp:app At this point in the work session, I have lost the command prompt. This must be such a non-issue that it doesn't even enter into an experienced user's consciousness. But unfortunately at my level of experience, I am left with several fundamental questions: Does the fact that I have lost the command prompt mean that the process is still running? How do I get back to the command prompt without killing the process? How do I come back and monitor the process later? How do I eventually kill the process? Any help is appreciated, thanks so much!

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  • Store system passwords with easy and secure access

    - by CodeShining
    I'm having to handle several VPS/services and I always set passwords to be different and random. What kind of storage do you suggest to keep these passwords safe and let me access them easily? These passwords are used for services like databases, webserver user and so on that run customers' services, so it's really important to keep them in a safe place and strong. I'm actually storing them in a google drive spreadsheet file, describing user, password, role, service. Do you know of better solutions? I'd like to keep them on a remote service to make sure I don't have to make backup copies (in case my hdd would fail somehow). I do work on *nix platforms (so windows specific solutions are not a choice here).

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