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  • What is the kernel module "hid_microsoft"?

    - by Masi
    The lsmod-command shows the odd module. The command "modprobe -a hid_microsoft" does not reveal anything. What is it? $ modinfo hid_microsoft filename: /lib/modules/2.6.28-15-generic/kernel/drivers/hid/hid-microsoft.ko license: GPL srcversion: 3FE2E2F2EE89174E885204A alias: hid:b0005v0000045Ep00000701 alias: hid:b0003v0000045Ep0000009D alias: hid:b0003v0000045Ep00000713 alias: hid:b0003v0000045Ep000000F9 alias: hid:b0003v0000045Ep000000DB alias: hid:b0003v0000045Ep0000003B depends: vermagic: 2.6.28-15-generic SMP mod_unload modversions 586

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  • How do I make XTerm not use bold?

    - by mike
    I like using XTerm, I like its default "fixed" font, and I like using terminal colors rather than having a monochromatic terminal. However, XTerm seems to insist on using a bold version of the font whenever it's displaying a bright color: I hate hate hate the bold version of the font, but I like the brightness. The man page seems to suggest that adding "XTerm.VT100.boldMode:false" to my ~/.Xresources would disable this "feature", but it doesn't seem to have any effect. I've had it in there for months, so it's not a rebooting issue. How can I force XTerm to always use the standard, non-bold version of the fixed font, even when it's displaying bright text? Edit: Some have suggested putting "XTerm*boldMode: false" in my ~/.Xresources. That didn't help either. I've confirmed that the changes have taken effect with xrdb, though: $ xrdb -query | grep boldMode XTerm*boldMode: false And if i run xprop and click an xterm, I get "WM_CLASS(STRING) = "xterm", "XTerm"" .. so i'm definitely running real xterms. BTW, this is just a plain-vanilla Ubuntu Intrepid box. If anyone else here is running the same, can you try running: echo -e '#\e[1m#' ...and let me know whether the # on the right has a black pixel in the middle like the one on the left does?

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  • server will not reply (syn -ack)

    - by Brent
    I like to use the following commands to manage 'TIME_WAIT', in the hope to free up resources. echo 20 > /proc/sys/net/ipv4/tcp_fin_timeout sysctl -w net.ipv4.tcp_tw_reuse=1 sysctl -w net.ipv4.tcp_tw_recycle=1 I found something interesting while doing a tcpdump. Sometimes if a client makes a connection (syn), the server will not reply (syn -ack). My question is, could it be because of the top three commands.

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  • Missing NFS service link?

    - by Recc
    # ps ax | grep nfs 1108 ?        S<     0:00 [nfsd4] 1109 ?        S<     0:00 [nfsd4_callbacks] 1110 ?        S      0:00 [nfsd] 1111 ?        S      0:00 [nfsd] 1112 ?        S      0:00 [nfsd] 1113 ?        S      0:00 [nfsd] 1114 ?        S      0:00 [nfsd] 1115 ?        S      0:00 [nfsd] 1116 ?        S      0:00 [nfsd] 1117 ?        S      0:00 [nfsd] 4437 ?        S<     0:00 [nfsiod] 16799 ?        S      0:00 [nfsv4.0-svc] 18091 pts/1    S+     0:00 grep nfs But # service nfs status nfs: unrecognized service That'll be on Ubuntu 11.04 am I missing a sym link or something? How can I fix this quickly?

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  • Postfix + procmail - delivery fails because "can't create user output file" - on CentOS 6.2

    - by jshin47
    I verified that my postfix installation / relaying setup worked. Now I am having trouble with procmail. I have it wired to postfix with the following command: mailbox_command = /usr/bin/procmail -f -a "$USER" I have nothing in my procmail config but the following: LOGFILE=/var/procmailrc/log And I send an email to a recipient that previously worked (before I attached procmail). Now it fails with error: Apr 6 14:07:05 localhost postfix/qmgr[15194]: D0C3DFF6E1: from=<[email protected]>, size=938, nrcpt=1 (queue active) Apr 6 14:07:05 localhost postfix/local[1953]: D0C3DFF6E1: to=<[email protected]>, orig_to=<postmaster>, relay=local, delay=0.05, delays=0.02/0.01/0/0.02, dsn=5.2.0, status=bounced (can't create user output file. Command output: procmail: Couldn't create "/var/spool/mail/nobody" procmail: Couldn't read "//root" ) Apr 6 14:07:05 localhost postfix/bounce[1955]: warning: D0C3DFF6E1: undeliverable postmaster notification discarded Apr 6 14:07:05 localhost postfix/qmgr[15194]: D0C3DFF6E1: removed It seems like there is some sort of permissions issue but I do not know what the problem is, nor do I understand how I would go about diagnosing it further. The logfile that I specified is empty, by the way. How can I make procmail+postfix work?

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  • Install Windows 8 from recovery disk on VirtualBox [on hold]

    - by user1032531
    About 6 months ago, I bought a desktop HP PC with Windows 8 from Costco. I made a recovery disk (actually, took 4 DVDs) of the operating system and copied down the product key. I then did a fresh Cento6 install on the machine. I know wish to operate Windows (8 I guess, but I would rather have 7) on a VirtualBox on the Centos box. Is this possible? Any recommendations where to start? Can I do so without re-installing all the HP baggage?

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  • Easy way of daemonizing in CentOS 5.4

    - by Saif Bechan
    I know there is a program called upstart that can make it easy to make small daemons. I can't get this program to configure on CentOS. I get all sort of errors concerning pkg-congfig, libnih, and dbus. I am working on a node.ja application and this is a pain to start and stop all the time, so I want to create a deamon for this which makes it easy to start and stop.

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  • netstat -ntap doesn't show pid/process name for some connections?

    - by depesz
    I have ubuntu/hardy server, with kernel 2.6.24-23-server and netstat: # netstat --version net-tools 1.60 netstat 1.42 (2001-04-15) The problem is that we have a lot of ESTABLISHED connections that don't show PID nor Program name in netstat -ntap output. Netstat was called from root, there are no chroots, grsecurity, nor anything like this (or so I was told :). Any idea on what might be wrong? UPDATE lsof -n -i works ok, and shows pid/process name for the connections.

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  • What amount of physical RAM would a typical "commodity class" server have, as of late 2013?

    - by marathon
    I'm trying to spec out servers for my company's infrastructure group to build. They tell me anything more than 2GB is too much, which I find ridiculous considering cheap DRAM is about 15 bucks a dimm in bulk and our particular software runs better with more memory. I tried to find out how much google servers use, and pinning down a number is hard. Best I could find in a google research paper was that in 2008, their commodity servers were using 2 and 4GB dimms, but the paper never said how many. I realize "commodity server" is a vague term, but I'm just looking for a rough range in RAM used. I suspect at least 16GB is going to be the norm.

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  • Bash script to keep last x number of files and delete the rest

    - by Brady
    I have this bash script which nicely backs up my database on a cron schedule: #!/bin/sh PT_MYSQLDUMPPATH=/usr/bin PT_HOMEPATH=/home/philosop PT_TOOLPATH=$PT_HOMEPATH/philosophy-tools PT_MYSQLBACKUPPATH=$PT_TOOLPATH/mysql-backups PT_MYSQLUSER=********* PT_MYSQLPASSWORD="********" PT_MYSQLDATABASE=********* PT_BACKUPDATETIME=`date +%s` PT_BACKUPFILENAME=mysqlbackup_$PT_BACKUPDATETIME.sql.gz PT_FILESTOKEEP=14 $PT_MYSQLDUMPPATH/mysqldump -u$PT_MYSQLUSER -p$PT_MYSQLPASSWORD --opt $PT_MYSQLDATABASE | gzip -c > $PT_MYSQLBACKUPPATH/$PT_BACKUPFILENAME Problem with this is that it will keep dumping the backups in the folder and not clean up old files. This is where the variable PT_FILESTOKEEP comes in. Whatever number this is set to thats the amount of backups I want to keep. All backups are time stamped so by ordering them by name DESC will give you the latest first. Can anyone please help me with the rest of the BASH script to add the clean up of files? My knowledge of BASH is lacking and I'm unable to piece together the code to do the rest.

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  • rsync - Exclude files that are over a certain size?

    - by Rory
    I am doing a backup of my desktop to a remote machine. I'm basically doing rsync -a ~ example.com:backup/ However there are loads of large files, e.g. wikipedia dumps etc. Most of the files I care a lot about a small, such as firefox cookie files, or .bashrc. Is there some invocation to rsync that will exclude files that are over a certain size? That way I could copy all files that are less than 10MB first, then do all files. That way I can do a fast backup of the most important files, then a longer backup of everything else.

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  • How can I make the XAnalogTV xscreensaver fill my screen?

    - by Breakthrough
    I recently installed xscreensaver, as well as the additional/extra screensavers. Many of the OpenGL ones function correctly, going fullscreen as expected. However, for some reason, the XAnalogTV screensaver leaves two "blank" spots on the edges of my screen. If I manually launch XAnalogTV, it displays a window, which it fills correctly. When I maximize the window, the same effect occurs: the window maximizes, but the two edges of the screen are literally "transparent". This effect also occurs when the screensaver is set to fullscreen. For these reasons, I believe the problem may be related to the aspect ratio of the screen. The edges of the screen are literally "ignored", with nothing being drawn there. Specifically, note the transition between the maximized and full-screen screenshots (with the un-drawn whitespace shrinking as the vertical height has been increased). For reference, I am running Xubuntu 12.04 on a Dell Vostro 1520 (Intel P8600, Nvidia 9300M) with a 1440 x 900 display (16:10). I have also set the GetViewPortIsFullOfLies preference to true. Is there any way to force XAnalogTV to fill my entire screen? Alternatively, as I believe the problem is aspect-ratio related, is there any way I can get the screensaver to render larger than my display, and simply discard the extra pixels? Relevant screenshots (windowed, maximized, and full-screen, respectively): You can see in the last two that the scrollbar from Firefox is clearly visible, even though this is a full-screen screensaver.

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  • ssh-keygen works for root only?

    - by Hulk
    Does ssh-keygen -t rsa work if only set for root user i.e, if the username on local system is sodium and i generate the key using the above said command and on the remote system if i place the key in /root/.ssh authorized_keys ,this works. But on the remote system if the key is placed in /home/natrium/.ssh authorized_keys This still prompts for a password.Is this the expected behavior or is that some thing wrong in the above procedure Thanks..

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  • Is it possible to format ps RSS (memory) output to be more human friendly?

    - by metasoarous
    Executing ps ux returns a nice list of process information, easy to grep through or watch. However, there doesn't seem to be much flexibility in the memory usage output; the RSS (resident set size) is printed in kB, which for large processes is hard to read (especially at a glance), and %MEM gives 100 × RSS / system_memory. The du utility has a lovely -h flag which prints space in a more user friendly fashion. I have not been able to find anything equivalent for ps. Is there a special formatting trick that can accomplish this?

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  • "eject" command not working..

    - by shadyabhi
    shadyabhi@shadyabhi-desktop:~$ eject -v eject: using default device `cdrom' eject: device name is `cdrom' eject: expanded name is `/media/cdrom' eject: `/media/cdrom' is a link to `/media/cdrom0' eject: `/media/cdrom0' is not mounted eject: `/media/cdrom0' is not a mount point eject: tried to use `/media/cdrom0' as device name but it is no block device eject: unable to find or open device for: `cdrom' shadyabhi@shadyabhi-desktop:~$ The tray doesnt open.. How do I open tray using command line?

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  • ntpd on Fedora Core 6 with high negative time reset values

    - by Mark White
    The basic problem is we have a FC6 server instance running on a virtual machine, and the system time seems to have been slowly varying until it is now causing a problem. The server runs 24/7 and has been up for 155 days. It has been changed to show GMT, and reports the time as (example) 00:15:15 GMT whereas the actual time is 00:00:00 GMT. This is an offset of 915 seconds. selinux has been changed to 'setenforce 0' for testing and I am running as root. I stop the ntpd service and change the time in System|Administration|Date & Time. The time still shows the same with 'date' in bash. There are no error logs. I change the date with 'date --set' in bash. The response confirms the changed date. I run 'date' and the incorrect date is shown. There are no error logs. I start the ntpd service and /var/log/messages shows success with 'time reset -915.720139s'. The date remains unchanged. ntpq -p shows three three time servers all have offsets of around -915 seconds. I stop ntpd service and try 'ntpd -gqx' and get the same result as above - success, but a large negative time reset. I've tried varying combinations of the above, and a few more settings in System|Administration|Date & Time - no change. I just need to reset the system time to GMT. No offset. But I can't wait for ntpd to slew the time over the next few weeks. Any advice is welcome, cheers! Surely this shouldn't be this difficult... Mark...

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  • Failed to su after making a chroot jail

    - by arepo21
    On a 64 bit CentOS host I am using script make_chroot_jail.sh to put a user in a jail, not permitting it to see anything expect it's home at /home/jail/home/user1. I did it typing this: sudo ./make_chroot_jail.sh user1 after, when trying to connect to user1 first i was getting an error like: /bin/su: user guest does not exist i have fixed this by copying some missed libraries: sudo cp /lib64/libnss_compat.so.2 /lib64/libnss_files.so.2 /lib64/libnss_dns.so.2 /lib64/libxcrypt.so.2 /home/jail/lib64/ sudo cp -r /lib64/security/ /home/jail/lib64/ But now, when trying to connect to user1 typing su user1 and then typing it's password, i am getting this error: could not open session So the question is how to connect to user1 in this situation? P.S. Here are the permissions of some files, this might be helpful in order to provide a solution: -rwsr-xr-x 1 root root /home/jail/bin/su drwxr-xr-x 4 root root /home/jail/etc -rw-r--r-- 1 root root /home/jail/etc/pam.d/su -rw-r--r-- 1 root root /home/jail/etc/passwd -rw------- 1 root root /home/jail/etc/shadow UPDATE1 After some modifications i managed to connect to user1, but the session closes immediately! I guess this a PAM issue, however cant find a way to fix it. Here the log entry for close action from /val/log/secure: Oct 6 15:19:42 localhost su: pam_unix(su:session): session closed for user user1 What makes the session to exit immediately after launching?

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  • Permission denied message when starting gfs2

    - by sashang
    Can anyone please explain why I get this permission denied error? I try starting the script and it fails with a permission denied message. So I create a copy of it and run that instead and that works. [root@node2 ~]# /etc/init.d/gfs2 stop Unmounting GFS2 filesystem (/drbd): [ OK ] [root@node2 ~]# /etc/init.d/gfs2 start Mounting GFS2 filesystem (/drbd): gfs_controld join connect error: Permission denied error mounting lockproto lock_dlm [FAILED] [root@node2 ~]# cp /etc/init.d/gfs2 /etc/init.d/gfs2_test [root@node2 ~]# /etc/init.d/gfs2_test start Mounting GFS2 filesystem (/drbd): [ OK ] [root@node2 ~]# [root@node2 ~]# ls -l /etc/init.d/gfs2* -rwxr-xr-x. 1 root root 3365 Jan 15 12:11 /etc/init.d/gfs2 -rwxr-xr-x. 1 root root 3365 Jan 15 12:19 /etc/init.d/gfs2_test [root@node2 ~]#

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  • IP address reuse on macvlan devices

    - by Alex Bubnoff
    I'm trying to create easy to use and possibly simple testing environment for some product and got some strange behaviour of macvlan's. What I'm trying to achieve: make a toolset for one-line start/stop of lxc containers(via docker) bound to external ip(I have enough of it on host machine). So, I'm doing something like this: docker run -d -name=container_name container_image pipework eth1 container_name ip/prefix_len@gateway and pipework here does this: GUEST_IFNAME=ph$NSPID$eth1 ip link add link eth1 dev $GUEST_IFNAME type macvlan mode bridge ip link set eth1 up ip link set $GUEST_IFNAME netns $NSPID ip netns exec $NSPID ip link set $GUEST_IFNAME name eth1 ip netns exec $NSPID ip addr add $IPADDR dev eth1 ip netns exec $NSPID ip route delete default ip netns exec $NSPID ip link set eth1 up ip netns exec $NSPID ip route replace default via $GATEWAY ip netns exec $NSPID arping -c 1 -A -I eth1 $IPADDR And it works for first time per IP. But for second time and later packets for containers IP isn't getting into container, while all configuration seem fine. So it looks like this: External machine ? ping 212.76.131.212 ....silence.... Host machine root@ubuntu:~# ip link show eth1 2: eth1: mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:15:17:c9:e1:c9 brd ff:ff:ff:ff:ff:ff root@ubuntu:~# ip addr show eth1 2: eth1: mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:15:17:c9:e1:c9 brd ff:ff:ff:ff:ff:ff root@ubuntu:~# tcpdump -v -i eth1 icmp tcpdump: WARNING: eth1: no IPv4 address assigned tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes 00:00:46.542042 IP (tos 0x0, ttl 60, id 9623, offset 0, flags [DF], proto ICMP (1), length 84) 5.134.221.98 212.76.131.212: ICMP echo request, id 6718, seq 2345, length 64 00:00:47.549969 IP (tos 0x0, ttl 60, id 9624, offset 0, flags [DF], proto ICMP (1), length 84) 5.134.221.98 212.76.131.212: ICMP echo request, id 6718, seq 2346, length 64 00:00:48.558143 IP (tos 0x0, ttl 60, id 9625, offset 0, flags [DF], proto ICMP (1), length 84) 5.134.221.98 212.76.131.212: ICMP echo request, id 6718, seq 2347, length 64 00:00:49.566319 IP (tos 0x0, ttl 60, id 9626, offset 0, flags [DF], proto ICMP (1), length 84) 5.134.221.98 212.76.131.212: ICMP echo request, id 6718, seq 2348, length 64 00:00:50.573999 IP (tos 0x0, ttl 60, id 9627, offset 0, flags [DF], proto ICMP (1), length 84) 5.134.221.98 212.76.131.212: ICMP echo request, id 6718, seq 2349, length 64 ^C 5 packets captured 5 packets received by filter 0 packets dropped by kernel 1 packet dropped by interface Host machine, netns of container root@ubuntu:~# ip netns exec 32053 ip link show eth1 48: eth1@if2: mtu 1500 qdisc noqueue state UNKNOWN link/ether b2:12:f7:cc:a1:9d brd ff:ff:ff:ff:ff:ff root@ubuntu:~# ip netns exec 32053 ip addr show eth1 48: eth1@if2: mtu 1500 qdisc noqueue state UNKNOWN link/ether b2:12:f7:cc:a1:9d brd ff:ff:ff:ff:ff:ff inet 212.76.131.212/29 scope global eth1 inet6 fe80::b012:f7ff:fecc:a19d/64 scope link valid_lft forever preferred_lft forever root@ubuntu:~# ip netns exec 32053 tcpdump -v -i eth1 icmp tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes ....silence.... ^C 0 packets captured 0 packets received by filter 0 packets dropped by kernel So, can anyone say, what can it be? Can this be caused by not a bug in macvlan implementation? Is there any tools I can use to debug that configuration?

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  • FFMPEG: how to add watermark to video?

    - by DocWiki
    My Platform: Ubuntu 10.10 + FFMPEG 0.5.3(I installed ffmpeg from source) I try to add Watermark to a .MOV video with FFMPEG 0.5.3 imlib2.so (Please note FFMPEG 0.6+ dont support imlib2.so, so I use ffmpeg 0.5.3) Here is my code: ffmpeg -sameq -i example.mov -vhook '/usr/local/lib/vhook/imlib2.so -x 0 -y 0 -i /var/www/files/watermark.png' newexample.mov Here is the output: FFmpeg version 0.5.3, Copyright (c) 2000-2009 Fabrice Bellard, et al. configuration: --enable-avfilter --enable-filter=movie --enable-avfilter-lavf libavutil 49.15. 0 / 49.15. 0 libavcodec 52.20. 1 / 52.20. 1 libavformat 52.31. 0 / 52.31. 0 libavdevice 52. 1. 0 / 52. 1. 0 libavfilter 0. 4. 0 / 0. 4. 0 built on Jul 3 2011 12:05:08, gcc: 4.4.5 Seems stream 1 codec frame rate differs from container frame rate: 59.94 (5994/100) - 29.97 (30000/1001) Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'example.mov': Duration: 00:03:14.06, start: 0.000000, bitrate: 3350 kb/s Stream #0.0(eng): Audio: aac, 48000 Hz, stereo, s16 Stream #0.1(eng): Video: h264, yuv420p, 1150x647, 29.97 tbr, 29.97 tbn, 59.94 tbc Output #0, mov, to 'newexample.mov': Stream #0.0(eng): Video: mpeg4, yuv420p, 1150x647, q=2-31, 200 kb/s, 90k tbn, 29.97 tbc Stream #0.1(eng): Audio: 0x0000, 48000 Hz, stereo, s16, 64 kb/s Stream mapping: Stream #0.1 - #0.0 Stream #0.0 - #0.1 Unsupported codec for output stream #0.1 What could be the possible problem? Is that AAC or H264 that is not supported? I installed libavcodec-extra-52, linfaac, libfaad and etc. but the error is the same. Do I have to install following this instruction? HOWTO: Install and use the latest FFmpeg and x264 or there is a simpler solution?

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  • How to fix bluescreen in windows 7 with multi-boot?

    - by Ismail Sensei
    I have HP laptop 6730S with two Operating systems : Windows 7 Ultimate 32bit Centos 6.4 64Bit The GRUB2 is not installed in MBR, use Windows' bootloader. After I choose Windows in the start, the blue-screen appears with unmountable_boot_volume problem so I tried some help from similar questions here ( use Command Prompt and enter the following command: chkdsk /R C: ). But the problem is, I can't get repair my computer it took so long and nothing happened after I waited more than 2H and when I put my Windows 7 DVD to boot it charge the files then same thing happened nothing show up so I couldn't use command prompt. But when I use Centos everything works just fine the D partition i can mounted normally but C partition it shows me error and tell me to go to windows and repair it with Chkdsk command and here is where I am stuck.

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