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• Rate limit a wireless interface

  - by Jamie Hankins

  I have access to my routers SSH and IPTables. I want to rate limit my guest network to 1Mb/s so they can't guzzle my bandwidth. rai1 RTWIFI SoftAP ESSID:"GuestNetwork" Nickname:"" Mode:Managed Channel=6 Access Point: :F9 Bit Rate=300 Mb/s wdsi0 RTWIFI SoftAP ESSID:"YouCan'tTouchThis" Nickname:"" Mode:Managed Channel=6 Access Point: :F8 Bit Rate=300 Mb/s wdsi1 RTWIFI SoftAP ESSID:"YouCan'tTouchThis" Nickname:"" Mode:Managed Channel=6 Access Point: :F9 Bit Rate=300 Mb/s wdsi2 RTWIFI SoftAP ESSID:"YouCan'tTouchThis" Nickname:"" Mode:Managed Channel=6 Access Point: Not-Associated Bit Rate:300 Mb/s wdsi3 RTWIFI SoftAP ESSID:"YouCan'tTouchThis" Nickname:"" Mode:Managed Channel=6 Access Point: Not-Associated Bit Rate:300 Mb/s I'm just wondering the command I need to limit it. I tried the iwconfig limit command but it failed. Thanks

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• Rsyslog stops sending data to remote server after log rotation

  - by Vincent B.

  In my configuration, I have rsyslog who is in charge of following changes of /home/user/my_app/shared/log/unicorn.stderr.log using imfile. The content is sent to another remote logging server using TCP. When the log file rotates, rsyslog stops sending data to the remote server. I tried reloading rsyslog, sending a HUP signal and restarting it altogether, but nothing worked. The only ways I could find that actually worked were dirty: stop the service, delete the rsyslog stat files and start rsyslog again. All that in a postrotate hook in my logrotate file. kill -9 rsyslog and start it over. Is there a proper way for me to do this without touching rsyslog internals? Rsyslog file $ModLoad immark $ModLoad imudp $ModLoad imtcp $ModLoad imuxsock $ModLoad imklog $ModLoad imfile $template WithoutTimeFormat,"[environment] [%syslogtag%] -- %msg%" $WorkDirectory /var/spool/rsyslog $InputFileName /home/user/my_app/shared/log/unicorn.stderr.log $InputFileTag unicorn-stderr $InputFileStateFile stat-unicorn-stderr $InputFileSeverity info $InputFileFacility local8 $InputFilePollInterval 1 $InputFilePersistStateInterval 1 $InputRunFileMonitor # Forward to remote server if $syslogtag contains 'apache-' then @@my_server:5000;WithoutTimeFormat :syslogtag, contains, "apache-" ~ *.* @@my_server:5000;SyslFormat Logrotate file /home/user/shared/log/*.log { daily missingok dateext rotate 30 compress notifempty extension gz copytruncate create 640 user user sharedscripts post-rotate (stop rsyslog && rm /var/spool/rsyslog/stat-* && start rsyslog 2&1) || true endscript } FYI, the file is readable for the rsyslog user, my server is reachable and other log files which do not rotate on the same cycle continue to be tracked properly. I'm running Ubuntu 12.04.

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• Missing over 100GB of Space on sda1 RHEL

  - by WifiGhost

  I have a server setup with a RAID 5 using (3) 500GB drives, 1 as a spare so unused in the RAID. So in my mind i start out with 990GB with the RAID 5 in place. When looking at DF or the built in disk space utility i only see a total of about 882GB, how can i find where the 100+GB went? How can i get it back? I've checked the RAID 5 BIOS and i see all the space. I've tried looking manually and through terminal commands with no luck. Filesystem - 1K-blocks - Used Available - Use% - Mounted on /dev/mapper/vg_web-lv_root 838084192 48368700 747153060 7% / tmpfs 12104644 592 12104052 1% /dev/shm /dev/sda1 495844 121546 348698 26% /boot /dev/mapper/vg_web-lv_home 82569904 259136 78116468 1% /home Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_web-lv_root 800G 47G 713G 7% / tmpfs 12G 592K 12G 1% /dev/shm /dev/sda1 485M 119M 341M 26% /boot /dev/mapper/vg_web-lv_home 79G 254M 75G 1% /home

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• Error when make "make install" PHP WebDav

  - by kron

  Hi, I'm having issues install PHP WebDAV onto Fedora8 - after downloading and running make install I get the following errors: [root@ip-18-192-114-35 dav]# make install /bin/sh /tmp/dav/libtool --mode=compile gcc -I. -I/tmp/dav -DPHP_ATOM_INC -I/tmp/dav/include -I/tmp/dav/main -I/tmp/dav -I/usr/include/php -I/usr/include/php/main -I/usr/include/php/TSRM -I/usr/include/php/Zend -I/usr/include/php/ext -I/usr/include/php/ext/date/lib -DHAVE_CONFIG_H -g -O2 -c /tmp/dav/dav.c -o dav.lo gcc -I. -I/tmp/dav -DPHP_ATOM_INC -I/tmp/dav/include -I/tmp/dav/main -I/tmp/dav -I/usr/include/php -I/usr/include/php/main -I/usr/include/php/TSRM -I/usr/include/php/Zend -I/usr/include/php/ext -I/usr/include/php/ext/date/lib -DHAVE_CONFIG_H -g -O2 -c /tmp/dav/dav.c -fPIC -DPIC -o .libs/dav.o /tmp/dav/dav.c:21:23: error: ne_socket.h: No such file or directory /tmp/dav/dav.c:22:24: error: ne_session.h: No such file or directory /tmp/dav/dav.c:23:22: error: ne_utils.h: No such file or directory /tmp/dav/dav.c:24:21: error: ne_auth.h: No such file or directory /tmp/dav/dav.c:25:22: error: ne_basic.h: No such file or directory /tmp/dav/dav.c:26:20: error: ne_207.h: No such file or directory /tmp/dav/dav.c:35: error: expected specifier-qualifier-list before 'ne_session' /tmp/dav/dav.c: In function 'dav_destructor_dav_session': /tmp/dav/dav.c:152: error: 'DavSession' has no member named 'sess' /tmp/dav/dav.c:153: error: 'DavSession' has no member named 'sess' /tmp/dav/dav.c:155: error: 'DavSession' has no member named 'base_uri_path' /tmp/dav/dav.c:156: error: 'DavSession' has no member named 'user_name' /tmp/dav/dav.c:157: error: 'DavSession' has no member named 'user_password' /tmp/dav/dav.c:158: error: 'DavSession' has no member named 'sess' /tmp/dav/dav.c: In function 'cb_dav_auth': /tmp/dav/dav.c:194: error: 'DavSession' has no member named 'user_name' /tmp/dav/dav.c:194: error: 'NE_ABUFSIZ' undeclared (first use in this function) /tmp/dav/dav.c:194: error: (Each undeclared identifier is reported only once /tmp/dav/dav.c:194: error: for each function it appears in.) /tmp/dav/dav.c:195: error: 'DavSession' has no member named 'user_password' /tmp/dav/dav.c: In function 'zif_webdav_connect': /tmp/dav/dav.c:212: error: 'ne_session' undeclared (first use in this function) /tmp/dav/dav.c:212: error: 'sess' undeclared (first use in this function) /tmp/dav/dav.c:213: error: 'ne_uri' undeclared (first use in this function) /tmp/dav/dav.c:213: error: expected ';' before 'uri' /tmp/dav/dav.c:215: error: 'uri' undeclared (first use in this function) /tmp/dav/dav.c:259: error: 'DavSession' has no member named 'base_uri_path' /tmp/dav/dav.c:260: error: 'DavSession' has no member named 'base_uri_path_len' /tmp/dav/dav.c:262: error: 'DavSession' has no member named 'user_name' /tmp/dav/dav.c:264: error: 'DavSession' has no member named 'user_name' /tmp/dav/dav.c:267: error: 'DavSession' has no member named 'user_password' /tmp/dav/dav.c:269: error: 'DavSession' has no member named 'user_password' /tmp/dav/dav.c:271: error: 'DavSession' has no member named 'sess' /tmp/dav/dav.c: In function 'get_full_uri': /tmp/dav/dav.c:304: error: 'DavSession' has no member named 'base_uri_path_len' /tmp/dav/dav.c:307: error: 'DavSession' has no member named 'base_uri_path_len' /tmp/dav/dav.c:313: error: 'DavSession' has no member named 'base_uri_path' /tmp/dav/dav.c:313: error: 'DavSession' has no member named 'base_uri_path_len' /tmp/dav/dav.c:314: error: 'DavSession' has no member named 'base_uri_path_len' /tmp/dav/dav.c: In function 'zif_webdav_get': /tmp/dav/dav.c:329: error: 'ne_session' undeclared (first use in this function) /tmp/dav/dav.c:329: error: 'sess' undeclared (first use in this function) /tmp/dav/dav.c:330: error: 'ne_request' undeclared (first use in this function) /tmp/dav/dav.c:330: error: 'req' undeclared (first use in this function) /tmp/dav/dav.c:348: error: 'DavSession' has no member named 'sess' /tmp/dav/dav.c:354: error: 'ne_accept_2xx' undeclared (first use in this function) /tmp/dav/dav.c:359: error: 'NE_OK' undeclared (first use in this function) /tmp/dav/dav.c:359: error: invalid type argument of '->' /tmp/dav/dav.c: In function 'zif_webdav_put': /tmp/dav/dav.c:377: error: 'ne_session' undeclared (first use in this function) /tmp/dav/dav.c:377: error: 'sess' undeclared (first use in this function) /tmp/dav/dav.c:378: error: 'ne_request' undeclared (first use in this function) /tmp/dav/dav.c:378: error: 'req' undeclared (first use in this function) /tmp/dav/dav.c:396: error: 'DavSession' has no member named 'sess' /tmp/dav/dav.c:405: error: 'NE_OK' undeclared (first use in this function) /tmp/dav/dav.c:405: error: invalid type argument of '->' /tmp/dav/dav.c: In function 'zif_webdav_delete': /tmp/dav/dav.c:422: error: 'ne_session' undeclared (first use in this function) /tmp/dav/dav.c:422: error: 'sess' undeclared (first use in this function) /tmp/dav/dav.c:423: error: 'ne_request' undeclared (first use in this function) /tmp/dav/dav.c:423: error: 'req' undeclared (first use in this function) /tmp/dav/dav.c:441: error: 'DavSession' has no member named 'sess' /tmp/dav/dav.c:448: error: 'NE_OK' undeclared (first use in this function) /tmp/dav/dav.c:448: error: invalid type argument of '->' /tmp/dav/dav.c: In function 'zif_webdav_mkcol': /tmp/dav/dav.c:465: error: 'ne_session' undeclared (first use in this function) /tmp/dav/dav.c:465: error: 'sess' undeclared (first use in this function) /tmp/dav/dav.c:466: error: 'ne_request' undeclared (first use in this function) /tmp/dav/dav.c:466: error: 'req' undeclared (first use in this function) /tmp/dav/dav.c:484: error: 'DavSession' has no member named 'sess' /tmp/dav/dav.c:491: error: 'NE_OK' undeclared (first use in this function) /tmp/dav/dav.c:491: error: invalid type argument of '->' /tmp/dav/dav.c: In function 'zif_webdav_copy': /tmp/dav/dav.c:510: error: 'ne_session' undeclared (first use in this function) /tmp/dav/dav.c:510: error: 'sess' undeclared (first use in this function) /tmp/dav/dav.c:511: error: 'ne_request' undeclared (first use in this function) /tmp/dav/dav.c:511: error: 'req' undeclared (first use in this function) /tmp/dav/dav.c:539: error: 'DavSession' has no member named 'sess' /tmp/dav/dav.c:550: error: 'NE_DEPTH_INFINITE' undeclared (first use in this function) /tmp/dav/dav.c:550: error: 'NE_DEPTH_ZERO' undeclared (first use in this function) /tmp/dav/dav.c:554: error: 'NE_OK' undeclared (first use in this function) /tmp/dav/dav.c:554: error: invalid type argument of '->' /tmp/dav/dav.c: In function 'zif_webdav_move': /tmp/dav/dav.c:573: error: 'ne_session' undeclared (first use in this function) /tmp/dav/dav.c:573: error: 'sess' undeclared (first use in this function) /tmp/dav/dav.c:574: error: 'ne_request' undeclared (first use in this function) /tmp/dav/dav.c:574: error: 'req' undeclared (first use in this function) /tmp/dav/dav.c:598: error: 'DavSession' has no member named 'sess' /tmp/dav/dav.c:611: error: 'NE_OK' undeclared (first use in this function) /tmp/dav/dav.c:611: error: invalid type argument of '->' make: *** [dav.lo] Error 1 Any help would be much appreciated. Thanks!

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• I install Ubuntu 13.10 and reboot and im on KDE desktop?

  - by jgamer578

  Hi I'm Jacob and I have no idea what's going on. I installed Ubuntu 13.10 today and was playing around with it for a while and dl'd a bunch of apps from software center and stuff. Eventually I installed steam and (finally) got it working. I downloaded TF2 and had some weird issue where the screen got so distorted to the point I could not play. So I dl'd a driver for my graphics card from the additional drivers app (or whatever it's called) and when it was done I restarted my computer (because it said to.) When the PC booted up it loaded the KDE desktop and I have no idea why. I had unity before I rebooted. Ubuntu 13.10 is the only OS installed on my PC, and I still have all the apps that I downloaded, but I kinda like unity (I started using Ubuntu after they switched to unity) and want it back. Thanks for reading and any help in advance, Jacob.

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• Search all files containing text

  - by enthdegree

  With Busybox, how do you search for an expression within a bunch of files recursively through a bunch of directories, but only look through text files? We don't know what the file's suffix is going to be; it could be .sh, it could be nothing, it could be something else. I was considering somehow basing the search on encoding although I am not quite sure what the encoding would be either. I've tried busybox grep -r but it searches through binary files too, which wastes a lot of time.

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• Flexible traffic & bandwidth monitor

  - by BrNathan

  I have looked around, but have not found anything to meet our needs. I need something that can log all connections & bandwidth consumption. We need it for analysis: by protocol, source IP (& MAC if possible), destination, etc. Ideally we are looking for something that can produce custom graphs & also uses mysql. All connections go through one server on a bridged connection (2 network cards) so it is easy to pickup traffic. We are not concerned so much with internal LAN traffic as what passes in & out to the firewall. Thanks for you suggestions. Update: I use Ubuntu 10.04

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• Error with procmail script to use Maildir format

  - by bradlis7

  I have this code in /etc/procmailrc: DROPPRIVS=yes DEFAULT=$HOME/Maildir/ :0 * ? /usr/bin/test -d $DEFAULT || /bin/mkdir $DEFAULT { } :0 E { # Bail out if directory could not be created EXITCODE=127 HOST=bail.out } MAILDIR=$HOME/Maildir/ But, when the directory already exists, sometimes it will send a return email with this error: 554 5.3.0 unknown mailer error 127. The email still gets delivered, mind you, but it sends back an error code to the sending user as well. I fixed this temporarily by commenting out the EXITCODE and HOST lines, but I'd like to know if there is a better solution. I found this block of code in multiple places across the net, but couldn't really find why this error was coming back to me. It seems to happen when I send an email to a local user. Sometimes the user has a .forward file to send it on to other users, sometimes not, but the result has been the same. I also tried removing DROPPRIVS, just in case it was messing up the forwarding, but it did not seem to affect it. Is the line starting with * ? /usr/bin/test a problem? The * signifies a regex, but the ? makes it return an integer value, correct? What is the integer being matched against? Or is it just comparing the integer return value? Do I need a space between the two blocks? Thanks for the help.

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• USB To Serial under OpenSuse 11.3

  - by Exsisto

  I have a LogiLink USB-To-Serial adapter. This has the PL2303 chip inside. When I insert the device: [26064.927083] usb 7-1: new full speed USB device using uhci_hcd and address 9 [26065.076090] usb 7-1: New USB device found, idVendor=067b, idProduct=2303 [26065.076099] usb 7-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [26065.076105] usb 7-1: Product: USB-Serial Controller [26065.076110] usb 7-1: Manufacturer: Prolific Technology Inc. [26065.079181] pl2303 7-1:1.0: pl2303 converter detected [26065.091296] usb 7-1: pl2303 converter now attached to ttyUSB0 So the device is recognized and the converter is attached to ttyUSB0. When I do screen /dev/ttyUSB0 9600 I get the error: bash: /dev/ttyUSB0: Permission denied So I went looking in the file permissions. ls -l from the /dev folder reports: crw-rw---- 1 root dialout 188, 0 2011-04-26 15:47 ttyUSB0 I added my user lars to the dialout group. When I use the commands groups under lars it shows that I'm in the group. Though I still recieve the permissions denied error, as lars, and as root. I'm trying to connect to a console cable to configure some Cisco switches. My OS is OpenSuse 11.3 x86_64 with kernel version 2.6.34.7-0.7-desktop.

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• What does the filesystem give me?

  - by Alec

  I'm writing a specialised database. It currently sits atop of ext4, with one big file that it reads and writes to. I'm wondering whether it would be worth forgoing the filesystem and reading and writing directly to the device. I already use O_DIRECT, so as far as I can tell it wouldn't require much of a code change. What might the risks, advantages and disadvantages of forgoing the filesystem be? Is it likely to improve performance, or harm it?

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• KVM CLI install for CentOS 6.3 defaults to Minimal Install

  - by i.h4d35

  So I now I've installed KVM (and its associated tools and packages- libvirt, VMM etc.). On the GUI (i.e using the VMM), installation works as its supposed to. However, when I try to create a VM using the command line interface, the OS (I am working with CentOS 6.3) defaults to a Minimal Install instead of giving me options to choose from at the time of installation. I am trying to install using the following command: virt-install \ --connect qemu:///system \ --virt-type kvm --name testVM2 \ --ram 512 --disk path=/var/lib/libvirt/images/testVM2.img,size=8 --vnc \ --cdrom /media/db18de8e-0853-49fb-80de-5c794d58a46f/CentOS-6.3- x86_64-bin-DVD1.iso \ --network network=default Specifying the OS-type or the OS-variant parameters doesn't make a difference. Is there something that I am missing out on or some other parameter that I must specify? Thanks in advance.

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• Improving TCP performance over a gigabit network with lots of connections and high traffic of small packets

  - by MinimeDJ

  I’m trying to improve my TCP throughput over a “gigabit network with lots of connections and high traffic of small packets”. My server OS is Ubuntu 11.10 Server 64bit. There are about 50.000 (and growing) clients connected to my server through TCP Sockets (all on the same port). 95% of of my packets have size of 1-150 bytes (TCP header and payload). The rest 5% vary from 150 up to 4096+ bytes. With the config below my server can handle traffic up to 30 Mbps (full duplex). Can you please advice best practice to tune OS for my needs? My /etc/sysctl.cong looks like this: kernel.pid_max = 1000000 net.ipv4.ip_local_port_range = 2500 65000 fs.file-max = 1000000 # net.core.netdev_max_backlog=3000 net.ipv4.tcp_sack=0 # net.core.rmem_max = 16777216 net.core.wmem_max = 16777216 net.core.somaxconn = 2048 # net.ipv4.tcp_rmem = 4096 87380 16777216 net.ipv4.tcp_wmem = 4096 65536 16777216 # net.ipv4.tcp_synack_retries = 2 net.ipv4.tcp_syncookies = 1 net.ipv4.tcp_mem = 50576 64768 98152 # net.core.wmem_default = 65536 net.core.rmem_default = 65536 net.ipv4.tcp_window_scaling=1 # net.ipv4.tcp_mem= 98304 131072 196608 # net.ipv4.tcp_timestamps = 0 net.ipv4.tcp_rfc1337 = 1 net.ipv4.ip_forward = 0 net.ipv4.tcp_congestion_control=cubic net.ipv4.tcp_tw_recycle = 0 net.ipv4.tcp_tw_reuse = 0 # net.ipv4.tcp_orphan_retries = 1 net.ipv4.tcp_fin_timeout = 25 net.ipv4.tcp_max_orphans = 8192 Here are my limits: $ ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 193045 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1000000 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 1000000 [ADDED] My NICs are the following: $ dmesg | grep Broad [ 2.473081] Broadcom NetXtreme II 5771x 10Gigabit Ethernet Driver bnx2x 1.62.12-0 (2011/03/20) [ 2.477808] bnx2x 0000:02:00.0: eth0: Broadcom NetXtreme II BCM57711E XGb (A0) PCI-E x4 5GHz (Gen2) found at mem fb000000, IRQ 28, node addr d8:d3:85:bd:23:08 [ 2.482556] bnx2x 0000:02:00.1: eth1: Broadcom NetXtreme II BCM57711E XGb (A0) PCI-E x4 5GHz (Gen2) found at mem fa000000, IRQ 40, node addr d8:d3:85:bd:23:0c [ADDED 2] ethtool -k eth0 Offload parameters for eth0: rx-checksumming: on tx-checksumming: on scatter-gather: on tcp-segmentation-offload: on udp-fragmentation-offload: off generic-segmentation-offload: on generic-receive-offload: on large-receive-offload: on rx-vlan-offload: on tx-vlan-offload: on ntuple-filters: off receive-hashing: off [ADDED 3] sudo ethtool -S eth0|grep -vw 0 NIC statistics: [1]: rx_bytes: 17521104292 [1]: rx_ucast_packets: 118326392 [1]: tx_bytes: 35351475694 [1]: tx_ucast_packets: 191723897 [2]: rx_bytes: 16569945203 [2]: rx_ucast_packets: 114055437 [2]: tx_bytes: 36748975961 [2]: tx_ucast_packets: 194800859 [3]: rx_bytes: 16222309010 [3]: rx_ucast_packets: 109397802 [3]: tx_bytes: 36034786682 [3]: tx_ucast_packets: 198238209 [4]: rx_bytes: 14884911384 [4]: rx_ucast_packets: 104081414 [4]: rx_discards: 5828 [4]: rx_csum_offload_errors: 1 [4]: tx_bytes: 35663361789 [4]: tx_ucast_packets: 194024824 [5]: rx_bytes: 16465075461 [5]: rx_ucast_packets: 110637200 [5]: tx_bytes: 43720432434 [5]: tx_ucast_packets: 202041894 [6]: rx_bytes: 16788706505 [6]: rx_ucast_packets: 113123182 [6]: tx_bytes: 38443961940 [6]: tx_ucast_packets: 202415075 [7]: rx_bytes: 16287423304 [7]: rx_ucast_packets: 110369475 [7]: rx_csum_offload_errors: 1 [7]: tx_bytes: 35104168638 [7]: tx_ucast_packets: 184905201 [8]: rx_bytes: 12689721791 [8]: rx_ucast_packets: 87616037 [8]: rx_discards: 2638 [8]: tx_bytes: 36133395431 [8]: tx_ucast_packets: 196547264 [9]: rx_bytes: 15007548011 [9]: rx_ucast_packets: 98183525 [9]: rx_csum_offload_errors: 1 [9]: tx_bytes: 34871314517 [9]: tx_ucast_packets: 188532637 [9]: tx_mcast_packets: 12 [10]: rx_bytes: 12112044826 [10]: rx_ucast_packets: 84335465 [10]: rx_discards: 2494 [10]: tx_bytes: 36562151913 [10]: tx_ucast_packets: 195658548 [11]: rx_bytes: 12873153712 [11]: rx_ucast_packets: 89305791 [11]: rx_discards: 2990 [11]: tx_bytes: 36348541675 [11]: tx_ucast_packets: 194155226 [12]: rx_bytes: 12768100958 [12]: rx_ucast_packets: 89350917 [12]: rx_discards: 2667 [12]: tx_bytes: 35730240389 [12]: tx_ucast_packets: 192254480 [13]: rx_bytes: 14533227468 [13]: rx_ucast_packets: 98139795 [13]: tx_bytes: 35954232494 [13]: tx_ucast_packets: 194573612 [13]: tx_bcast_packets: 2 [14]: rx_bytes: 13258647069 [14]: rx_ucast_packets: 92856762 [14]: rx_discards: 3509 [14]: rx_csum_offload_errors: 1 [14]: tx_bytes: 35663586641 [14]: tx_ucast_packets: 189661305 rx_bytes: 226125043936 rx_ucast_packets: 1536428109 rx_bcast_packets: 351 rx_discards: 20126 rx_filtered_packets: 8694 rx_csum_offload_errors: 11 tx_bytes: 548442367057 tx_ucast_packets: 2915571846 tx_mcast_packets: 12 tx_bcast_packets: 2 tx_64_byte_packets: 35417154 tx_65_to_127_byte_packets: 2006984660 tx_128_to_255_byte_packets: 373733514 tx_256_to_511_byte_packets: 378121090 tx_512_to_1023_byte_packets: 77643490 tx_1024_to_1522_byte_packets: 43669214 tx_pause_frames: 228 Some info about SACK: When to turn TCP SACK off?

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• Determine the time difference between two linux servers

  - by Paul

  I am troubleshooting a latency network issue on a network. It is probably a nic or cabling issue, but while I was going through the process of figuring it out, I was looking at the timings of a ping packet leaving a network card and arriving at another server. Both linux. So I have tcpdump running on both, and I issue a ping from one to the other, and back again, and looking at the timing differences might have shed light on where the latency is coming from. It is an academic exercise now, as I need to eliminate some more fundamental causes, but I was curious as to how this could be achieved. Given that ntpd is installed and running on two servers, how can I confirm the current time discrepency between the two servers, to whatever level of accuracy is possible - given that we are talking about latency on a local lan, which is ideally a millisecond or so. NTP itself is accurate to a couple of ms under good conditions, and as both servers are in the same environment, they should (presumably) achieve a similar level of accuracy, and so should have a time discrepency between them of a only few ms - but how can I check this?

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• Testing home directory scripts by setting $HOME to the location of the test directory

  - by intuited

  I have an interdependent collection of scripts in my ~/bin directory as well as a developed ~/.vim directory and some other libraries and such in other subdirectories. I've been versioning all of this using git, and have realized that it would be potentially very easy and useful to do development and testing of new and existing scripts, vim plugins, etc. using a cloned repo, and then pull the working code into my actual home directory with a merge. The easiest way to do this would seem to be to just change & export $HOME, eg cd ~/testing; git clone ~ home export HOME=~/testing/home cd ~ screen -S testing-home # start vim, write/revise plugins, edit scripts, etc. # test revisions However since I've never tried this before I'm concerned that some programs, environment variables, etc., may end up using my actual home directory instead of the exported one. Is this a viable strategy? Are there just a few outliers that I should be careful about? Is there a much better way to do this sort of thing?

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• Ubuntu 10.04 Keyboard and Mouse Freezing Problem

  - by nitbuntu

  I had a partition setup with Windows XP and Ubuntu 8.04 dual booting. I recently upgraded to Ubuntu 10.04 by installing fresh from CD but leaving the previous /home folder as is. Things seemed to be working fine, but started finding that my mouse and keyboard were freezing. After a quick search on the internet, I found the following suggestions as shown here:- Ubuntu Forums Here the suggestion was to:- Edit /etc/default/grub, go to the line that begins like: GRUB_CMDLINE_LINUX_DEFAULT= Change it to: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=off" After that, run this command: sudo update-grub and Reboot This seemed to have resolved the issue but after a couple of days I again find my mouse and keyboard freezing. I also find that my parallel port printer had also stopped working. I have saved the output of dmesg and my syslog. The first can be viewed here but the syslog had too many characters, so if someone can suggest an alternative to freetexthost, I can post it there. Moreover, if there is any other information that should be provided, do let me know. I do hope we can get to the bottom of this issue. Thank you in advance for any help that could be provided.

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• Have rTorrent to move .torrent files

  - by David Alvares

  I am running rTorrent 0.9.2 and have configured it to move completed torrents to a different folder with this configuration line: system.method.set_key = event.download.finished,move_complete,"d.set_directory=~/done/;execute=mv,-u,$d.get_base_path=,~/done/" This is working fine, but I would like it to also move the .torrent file that it creates (from a magnet link into the session directory) into this done directory with the same name as the torrent and a .torrent extension. I tried adding another cp command, but I can not seem to figure out which variable ($d.get_hash did not work) stores the torrent's hash (which is what the .torrent files are named in the session directory). Is there a way to do this with rTorrent, if so how?

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• Vim Stuck In Insert Mode

  - by Levi Hackwith

  I've been using Vim for several months now via my web host (they allow putty access). All of a sudden, the escape key has become unresponsive. I cannot exist insert or any other mode by simply hitting escape. I have to hit F1 which brings up the help in vim and kicks me into command mode. I'm most certain that my escape key on my keyboard is functioning fine since all of my windows shortcuts that use the escape key operate normally. I know this is a ridiculous question and I'm certain there's a lot more to look into regarding a solution. What I really need is a solid lead as to where to start looking. Things that might help: I'm using vim via putty I'm logging in using jailshell I'm not root

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• Debugging Samba/CUPS printer sharing with Windows

  - by mrdrbob

  I've got a HP Deskjet hooked up to a Slackware 12.2 box. I've got CUPS set up and can print a test page from the box just fine. I've also got Samba set up and have a couple file shares that work fine. I'm trying to share that HP Deskjet out via Samba, but I can't get it to show up in any Windows system. I see the server and its file shares in Windows networking, but when I open the Printers, no printer shows up. Running net view \\servername from the command line lists the file shares, but no printers. Here's the pertinent part of my smb.conf, if that helps: [global] workgroup = HOMENET security = share hosts allow = 192.168.1. 192.168.2. 127. load printers = yes printcap name = cups printing = cups log file = /var/log/samba.%m max log size = 50 [printers] comment = All Printers path = /var/spool/samba browseable = no public = yes writable = no printable = yes guest only = yes Can anyone give me some pointers as to where to start looking for potential causes? Update: Running testparm shows no errors. Here's the output (minus the file shares): [global] workgroup = HOMENET security = SHARE log file = /var/log/samba.%m max log size = 50 printcap name = cups hosts allow = 192.168.1., 192.168.2., 127. [printers] comment = All Printers path = /var/spool/samba guest only = Yes guest ok = Yes printable = Yes browseable = No

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• help with xorg.conf: xrandr on one of two widescreen monitors; rhel5, kde, ATI Radeon X1300

  - by user35997

  Can anyone help with me configure my dual-screen monitors for rotation? I have xrandr 1.1. Have tried various approaches, nothing takes. I can't even get the xrandr options to show up in KDE's Display control panel. Thanks1 My lspci output: 03:00.0 VGA compatible controller: ATI Technologies Inc RV516 [Radeon X1300/X1550 Series] My current xorg.conf (works, minus screen rotation): # Xorg configuration created by system-config-display Section "ServerLayout" Identifier "Multihead layout" Screen 0 "aticonfig-Screen[0]" 0 0 InputDevice "Keyboard0" "CoreKeyboard" Option "Xinerama" "off" Option "Clone" "on" EndSection Section "Files" EndSection Section "Module" EndSection Section "InputDevice" Identifier "Keyboard0" Driver "kbd" Option "XkbModel" "pc105" Option "XkbLayout" "us" EndSection Section "Monitor" ### Comment all HorizSync and VertSync values to use DDC: Identifier "Monitor1" VendorName "Monitor Vendor" ModelName "Dell 2407WFP (Digital)" HorizSync 30.0 - 83.0 VertRefresh 56.0 - 76.0 Option "dpms" EndSection Section "Monitor" Identifier "aticonfig-Monitor[0]" Option "VendorName" "ATI Proprietary Driver" Option "ModelName" "Generic Autodetecting Monitor" Option "DPMS" "true" EndSection Section "Device" Identifier "Videocard0" Driver "vesa" EndSection Section "Device" Identifier "Videocard1" Driver "vesa" VendorName "Videocard Vendor" BoardName "ATI Technologies Inc RV516 [Radeon X1300/X1550 Series]" BusID "PCI:3:0:0" EndSection Section "Device" Identifier "aticonfig-Device[0]" Driver "fglrx" Option "DesktopSetup" "horizontal" EndSection Section "Screen" Identifier "Screen0" Device "Videocard0" DefaultDepth 16 SubSection "Display" Viewport 0 0 Depth 24 EndSubSection SubSection "Display" Viewport 0 0 Depth 16 EndSubSection EndSection Section "Screen" Identifier "Screen1" Device "Videocard1" Monitor "Monitor1" DefaultDepth 16 SubSection "Display" Viewport 0 0 Depth 16 Modes "1920x1200" "1280x1024" "800x600" EndSubSection EndSection Section "Screen" Identifier "aticonfig-Screen[0]" Device "aticonfig-Device[0]" Monitor "aticonfig-Monitor[0]" DefaultDepth 24 SubSection "Display" Viewport 0 0 Depth 24 Modes "1920x1200" "1280x1024" "800x600" EndSubSection EndSection

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• Would firewire networking be better than 100Megabit ethernet?

  - by Josh

  My office network has a fully switched 1000Megabit ethernet network. I have an Apple iMac with a Gigabit NIC and FireWire, and a Compaq laptop with a 100Megabit NIC and a 4-pin FireWire interface. Accessing my office's shared drives using my laptop is (obviously) much loswer using my laptop than my iMac. Would I see a noticeible performance boost if I enabled Internet Connection Sharing on my iMac and shared the private ethernet network from my iMac with my laptop over FireWire? FireWire is 480Mbit/sec, right? So would I see roughly 4x speed improvement with such a setup?

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• How to solve "Broken Pipe" error when using awk with head

  - by Jon

  I'm getting broken pipe errors from a command that does something like: ls -tr1 /a/path | awk -F '\n' -vpath=/prepend/path/ '{print path$1}' | head -n 50 Essentially I want to list (with absolute path) the oldest X files in a directory. What seems to happen is that the output is correct (I get 50 file paths output) but that when head has output the 50 files it closes stdin causing awk to throw a broken pipe error as it is still outputting more rows.

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• Folder permissions when using /etc/skel and pam

  - by rothgar

  I have a Red Hat 5.8 server that is bound to active directory and users are authenticated via active directory when they log in via sftp. User home folders are created during login using /etc/pam.d/system-auth. The specific line that creates the home folder is session optional pam_mkhomedir.so skel=/etc/skel/ umask=0066 This correctly gives home folders 711 permissions so no one else can read their directories. The problem is, the pam_mkhomedir.so also modifies permissions on all folders/files inside the /etc/skel folder which I don't want. There is a public_html folder (for apache) which needs to have 755 permissions so users can create web pages. Is there a way for me to either a) stop pam_mkhomedir.so from recursively changing all the file permissions or b) create a script that creates the public_html folder after skel is copied and to set the correct permissions?

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• droid cam makefile understanding and error

  - by nerorevenge

  I tried installing the droid cam on my fedora 19 (64 bit) . Link to the droid cam application is here and whenever I try to install it , the Makefile which is as follows is invoked obj-m := v4l2loopback-dc.o all: make -C /lib/modules/`uname -r`/build M=`pwd` test: gcc test.c -o test clean: make -C /lib/modules/`uname -r`/build M=`pwd` clean insmod: sudo insmod v4l2loopback-dc.ko width=320 height=240 rmmod: sudo rmmod v4l2loopback-dc.ko and here is the error -- INSTALL: Webcam parameters: '320' and '240' -- INSTALL: Building v4l2loopback-dc.ko make -C /lib/modules/`uname -r`/build M=`pwd` make: *** /lib/modules/3.9.5-301.fc19.x86_64/build: No such file or directory. Stop. make: *** [all] Error 2 -- INSTALL: v4l2loopback-dc.ko not built.. Failure build happens to be a symbolic link.I was wondering what exactly is the makefile trying to and why is it failing?

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• how do I create a new git repository with turnkey redmine?

  - by Ali Shafai

  I have downloaded the Turnkey's redmine VM and it's running finr (I can create new projects and wikis and document lists etc etc). only thing is I can't make it to use my new git repos. I found this link, but it didn't help. any help appreciated.

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• Windows 8 won't boot after Boot Repair

  - by Rudolph Gottesheim

  I've got a Sony Vaio laptop. Until yesterday I had Windows 7 and Ubuntu 12.04 installed. Today I upgraded to Windows 8, which killed my OS selection screen. So I booted to Ubuntu 12.10 from a USB stick and ran Boot Repair. This recovered the GRUB screen and let me boot into my Ubuntu 12.04 installation, but now I can' boot Windows 8. When I select the option that booted Windows 7 before, it looks like it wants to start Windows 7 (sic) again (black screen, with the text "Windows is loading" or something), but then reboots the machine after a few seconds. I'm sure Boot Repair can fix this, but I know far too little about the whole booting thing to know the right settings for it. Here's my boot repair report thing.

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