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  • How could your company's learning/development department best serve you?

    - by MTR
    I'll preface my question with a disclaimer - I am not an engineer, I'm just someone who works with them full-time, in a learning and development capacity. Given that, one of the comments I get regularly from the engineers I'm tasked with developing is that they feel that they're having solutions (both technical and non-technical) for development "pushed" at them vs. anyone from my field consulting with them to determine what they really need. So my question is - if you could give your company a list of the top 3-5 things they could do - in a classroom, or elsewhere - to develop meaningful skills that would help you be a better engineer, a better employee, and one more likely to STAY with the company for the long haul, what would make the cut and why? Thanks in advance for your responses.

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  • Sharing wireless internet connection between 2 Ubuntu 10.04 systems using cross-over cable

    - by Gary
    I have a Lenovo T60 with Ubuntu 10.04 connected with a cross-over cable to a Dell Vostro 1400, also running Ubuntu 10.04. My internet is coming into the Lenovo through an external wireless antennae, and I want to share the internet with the Dell. On the Lenovo: eth0 connection has IPv4 Settings 'Shared to other computers' I can ping the Dell (10.42.43.10) successfully I can use mtr to trace to www.google.com successfully On the Dell: eth0 connection has IPv4 Settings 'Automatic DHCP' I can ping the Lenovo (10.42.43.1) successfully when I use mtr to trace to www.google.com, I can only reach 10.42.43.1 I must be missing some setting, but cannot see what it is; can anyone help me?

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  • Userdefined margins in WPF printing

    - by MTR
    Most printing samples for WPF go like this: PrintDialog dialog = new PrintDialog(); if (dialog.ShowDialog() == true) { StackPanel myPanel = new StackPanel(); myPanel.Margin = new Thickness(15); Image myImage = new Image(); myImage.Width = dialog.PrintableAreaWidth; myImage.Stretch = Stretch.Uniform; myImage.Source = new BitmapImage(new Uri("pack://application:,,,/Images/picture.bmp")); myPanel.Children.Add(myImage); myPanel.Measure(new Size(dialog.PrintableAreaWidth, dialog.PrintableAreaHeight)); myPanel.Arrange(new Rect(new Point(0, 0), myPanel.DesiredSize)); dialog.PrintVisual(myPanel, "A Great Image."); } What I don't like about this is, that they always set the margin to a fixed value. But in PrintDialog the user has the option to choose a individual margin that no sample cares about. If the user now selects a margin that is larger as the fixed margin set by program, the printout is truncated. Is there a way to get the user selected margin value from PrintDialog? TIA Michael

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  • Are there any lightweight analogues to CORBA/RPC for embedded programs?

    - by Mtr
    I am writing embedded applications for different hardware (avr, arm7, tms55xx…) and different rtoses (freeRTOS, rtx, dsp/bios). And every second of them needs to communicate with PC or another digital device. Sometimes interactions logic is very advanced. So I'm interesting in common methodology (like state-machine programming style), protocol specification or library, that could simplify developing such things.

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  • Flash site loads slowly

    - by bogdanvursu
    I have a simple html page that embeds an swf, that downloads other xml, swf and image files. The total count of the requests reaches about 90. I am aware that it should take a while until the content is available and I am OK with that. All the needed files are hosted by two different providers in the US: flashxml.net/monochrome-demo.html and u1.flashcomponents.net/samples/8751/index.html From two different countries in Europe, the content shows up a lot later (almost twice as later) from flashxml, than flashcomponents. I've done mtr tests and the ping difference is about 40ms and the flashxml server load is below 1. Do you have any other suggestions as to what should I look at?

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  • unable to install anything ,getting error subprocess installed post-installation script returned error exit status 1

    - by soum
    dpkg: error processing mono-4.0-gac (--configure): subprocess installed post-installation script returned error exit status 1 Processing triggers for mousetweaks ... No apport report written because MaxReports is reached already postinst called with unknown argument `triggered' dpkg: error processing mousetweaks (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already Processing triggers for mozilla-plugin-vlc ... postinst called with unknown argument `triggered' dpkg: error processing mozilla-plugin-vlc (--configure): subprocess installed post-installation script returned error exit status 1 Processing triggers for mtools ... No apport report written because MaxReports is reached already postinst called with unknown argument `triggered' dpkg: error processing mtools (--configure): subprocess installed post-installation script returned error exit status 1 Processing triggers for network-manager-pptp-gnome ... No apport report written because MaxReports is reached already postinst called with unknown argument `triggered' dpkg: error processing network-manager-pptp-gnome (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already Processing triggers for network-manager-pptp ... postinst called with unknown argument `triggered' dpkg: error processing network-manager-pptp (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already Processing triggers for network-manager-gnome ... /var/lib/dpkg/info/network-manager-gnome.postinst called with unknown argument `triggered' dpkg: error processing network-manager-gnome (--configure): subprocess installed post-installation script returned error exit status 1 Processing triggers for network-manager ... No apport report written because MaxReports is reached already /var/lib/dpkg/info/network-manager.postinst called with unknown argument `triggered' dpkg: error processing network-manager (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already Processing triggers for mscompress ... postinst called with unknown argument `triggered' dpkg: error processing mscompress (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already Errors were encountered while processing: netbase mtr-tiny module-init-tools mountmanager mono-4.0-gac mousetweaks mozilla-plugin-vlc mtools network-manager-pptp-gnome network-manager-pptp network-manager-gnome network-manager mscompress E: Sub-process /usr/bin/dpkg returned an error code (1)

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  • Troubleshooting Your Network with Oracle Linux

    - by rickramsey
    Are you afraid of network problems? I was. Whenever somebody said "it's probably the network," I went to lunch. And hoped that it was fixed by the time I got back. Turns out it wasn't that hard to do a little basic troubleshooting Tech Article: Troubleshooting Your Network with Oracle Linux by Robert Chase You're no doubt already familiar with ping. Even I knew how to use ping. Turns out there's another command that can show you not just whether a system can respond over the network, but the path the packets to that system take. Our blogging platform won't allow me to write the name down, but I can tell you that if you replace the x in this word with an e, you'll have the right command: tracxroute Once you get used to those, you can venture into the realms of mtr, nmap, and netcap. Robert Chase explains how each one can help you troubleshoot the network, and provides examples for how to use them. Robert is not only a solid writer, he is also a brilliant motorcyclist and rides an MV Augusta F4 750. About the Photograph Photo of flowers in San Simeon, California, taken by Rick Ramsey on a ride home from the Sun Reunion in May 2014. - Rick Follow me on: Personal Blog | Personal Twitter   Follow OTN Garage on: Web | Facebook | Twitter | YouTube

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  • How to fix "Sub-process /usr/bin/dpkg returned an error code (1)" when installing and upgrading packages?

    - by soum
    I am getting this error whenever tring to install or update anything: "Sub-process /usr/bin/dpkg returned an error code (1)" I need help, as I cannot install or upgrade any packages on my Ubuntu 11.10 system. Here is the rest of the error: unknown argument `triggered' dpkg: error processing mtools (--configure): subprocess installed post-installation script returned error exit status 1 Processing triggers for network-manager-pptp-gnome ... No apport report written because MaxReports is reached already postinst called with unknown argument `triggered' dpkg: error processing network-manager-pptp-gnome (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already Processing triggers for network-manager-pptp ... postinst called with unknown argument `triggered' dpkg: error processing network-manager-pptp (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already Processing triggers for network-manager-gnome ... /var/lib/dpkg/info/network-manager-gnome.postinst called with unknown argument `triggered' dpkg: error processing network-manager-gnome (--configure): subprocess installed post-installation script returned error exit status 1 Processing triggers for network-manager ... No apport report written because MaxReports is reached already /var/lib/dpkg/info/network-manager.postinst called with unknown argument `triggered' dpkg: error processing network-manager (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already Processing triggers for mscompress ... postinst called with unknown argument `triggered' dpkg: error processing mscompress (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already Errors were encountered while processing: netbase mtr-tiny module-init-tools mountmanager mono-4.0-gac mousetweaks mozilla-plugin-vlc mtools network-manager-pptp-gnome network-manager-pptp network-manager-gnome network-manager mscompress E: Sub-process /usr/bin/dpkg returned an error code (1)

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  • can't install anything ,getting error "Sub-process /usr/bin/dpkg returned an error code (1)"

    - by soum
    i am getting error whenever tring to install or update anything. "Sub-process /usr/bin/dpkg returned an error code (1)" please help me i am just stopped with my ubuntu 11.10. no installation or update. th unknown argument `triggered' dpkg: error processing mtools (--configure): subprocess installed post-installation script returned error exit status 1 Processing triggers for network-manager-pptp-gnome ... No apport report written because MaxReports is reached already postinst called with unknown argument `triggered' dpkg: error processing network-manager-pptp-gnome (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already Processing triggers for network-manager-pptp ... postinst called with unknown argument triggered' dpkg: error processing network-manager-pptp (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already Processing triggers for network-manager-gnome ... /var/lib/dpkg/info/network-manager-gnome.postinst called with unknown argumenttriggered' dpkg: error processing network-manager-gnome (--configure): subprocess installed post-installation script returned error exit status 1 Processing triggers for network-manager ... No apport report written because MaxReports is reached already /var/lib/dpkg/info/network-manager.postinst called with unknown argument triggered' dpkg: error processing network-manager (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already Processing triggers for mscompress ... postinst called with unknown argumenttriggered' dpkg: error processing mscompress (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already Errors were encountered while processing: netbase mtr-tiny module-init-tools mountmanager mono-4.0-gac mousetweaks mozilla-plugin-vlc mtools network-manager-pptp-gnome network-manager-pptp network-manager-gnome network-manager mscompress E: Sub-process /usr/bin/dpkg returned an error code (1)

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  • Jquery .html and .load

    - by Jack Pilowsky
    I'm trying to teach myself jQuery and I'm a little stomped with the load() method. I'm working on eBay listings. Yes, I know includes are not allowed on ebay. However, there is a workaround that has been around for a few years and ebay doesn't seem to be cracking down on it. var ebayItemID='xxxxxxxxxxxxxx'; // This is eBay code. I cannot edit it. <h1 id="title"> TO BE REPLACED</h1> $(document).ready(function(){ var link = "http://www.ebay.com/itm/" + ebayItemID + "?item=" + ebayItemID + &viewitem=&vxp=mtr"; var newTitle = $('#title').load(link + "#itemTitle"); $('#title').html(newTitle); }); What's the point of this. I want to show the item title on the description, but I want to do so dynamically,

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  • MySQL 5.5 (Percona) assertion failure log.. what would cause this?

    - by Tom Geee
    256GB, 64 Core , AMD running Ubuntu 12.04 with Percona MySQL 5.5.28. Below is the assertion failure. We just had a second assertion failure (different "in file", position, etc) while running a large set of inserts. After the first failure, MySQL restarted after a reboot only - after continuously looping on the same error after trying to recover. I decided to do a mysqlcheck with -o for optimize. Since these are all Innodb tables (very large tables, 60+GB) this would do an alter table on all tables. In the middle of this , the below assertion failure happened again: 121115 22:30:31 InnoDB: Assertion failure in thread 140086589445888 in file btr0pcur.c line 452 InnoDB: Failing assertion: btr_page_get_prev(next_page, mtr) == buf_block_get_page_no(btr_pcur_get_block(cursor)) InnoDB: We intentionally generate a memory trap. InnoDB: Submit a detailed bug report to http://bugs.mysql.com. InnoDB: If you get repeated assertion failures or crashes, even InnoDB: immediately after the mysqld startup, there may be InnoDB: corruption in the InnoDB tablespace. Please refer to InnoDB: http://dev.mysql.com/doc/refman/5.5/en/forcing-innodb-recovery.html InnoDB: about forcing recovery. 03:30:31 UTC - mysqld got signal 6 ; This could be because you hit a bug. It is also possible that this binary or one of the libraries it was linked against is corrupt, improperly built, or misconfigured. This error can also be caused by malfunctioning hardware. We will try our best to scrape up some info that will hopefully help diagnose the problem, but since we have already crashed, something is definitely wrong and this may fail. Please help us make Percona Server better by reporting any bugs at http://bugs.percona.com/ key_buffer_size=536870912 read_buffer_size=131072 max_used_connections=404 max_threads=500 thread_count=90 connection_count=90 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 1618416 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. Thread pointer: 0x14edeb710 Attempting backtrace. You can use the following information to find out where mysqld died. If you see no messages after this, something went terribly wrong... stack_bottom = 7f687366ce80 thread_stack 0x30000 /usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x7b52ee] /usr/sbin/mysqld(handle_fatal_signal+0x484)[0x68f024] /lib/x86_64-linux-gnu/libpthread.so.0(+0xfcb0)[0x7f9cbb23fcb0] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0x35)[0x7f9cbaea6425] /lib/x86_64-linux-gnu/libc.so.6(abort+0x17b)[0x7f9cbaea9b8b] /usr/sbin/mysqld[0x858463] /usr/sbin/mysqld[0x804513] /usr/sbin/mysqld[0x808432] /usr/sbin/mysqld[0x7db8bf] /usr/sbin/mysqld(_Z13rr_sequentialP11READ_RECORD+0x1d)[0x755aed] /usr/sbin/mysqld(_Z17mysql_alter_tableP3THDPcS1_P24st_ha_create_informationP10TABLE_LISTP10Alter_infojP8st_orderb+0x216b)[0x60399b] /usr/sbin/mysqld(_Z20mysql_recreate_tableP3THDP10TABLE_LIST+0x166)[0x604bd6] /usr/sbin/mysqld[0x647da1] /usr/sbin/mysqld(_ZN24Optimize_table_statement7executeEP3THD+0xde)[0x64891e] /usr/sbin/mysqld(_Z21mysql_execute_commandP3THD+0x1168)[0x59b558] /usr/sbin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_state+0x30c)[0x5a132c] /usr/sbin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0x1620)[0x5a2a00] /usr/sbin/mysqld(_Z24do_handle_one_connectionP3THD+0x14f)[0x63ce6f] /usr/sbin/mysqld(handle_one_connection+0x51)[0x63cf31] /lib/x86_64-linux-gnu/libpthread.so.0(+0x7e9a)[0x7f9cbb237e9a] /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f9cbaf63cbd] Trying to get some variables. Some pointers may be invalid and cause the dump to abort. Query (7f6300004b60): is an invalid pointer Connection ID (thread ID): 876 Status: NOT_KILLED You may download the Percona Server operations manual by visiting http://www.percona.com/software/percona-server/. You may find information in the manual which will help you identify the cause of the crash. 121115 22:31:07 [Note] Plugin 'FEDERATED' is disabled. 121115 22:31:07 InnoDB: The InnoDB memory heap is disabled 121115 22:31:07 InnoDB: Mutexes and rw_locks use GCC atomic builtins .. Then it recovered , without a reboot this time. from the log, what would cause this? I am currently running a dump to see if the problem resurfaces. edit: data partition is all in / since this is a hosted, defaulted file system unfortunately: Filesystem Size Used Avail Use% Mounted on /dev/vda3 742G 445G 260G 64% / udev 121G 4.0K 121G 1% /dev tmpfs 49G 248K 49G 1% /run none 5.0M 0 5.0M 0% /run/lock none 121G 0 121G 0% /run/shm /dev/vda1 99M 54M 40M 58% /boot my.cnf: [client] port = 3306 socket = /var/run/mysqld/mysqld.sock [mysqld_safe] socket = /var/run/mysqld/mysqld.sock nice = 0 [mysqld] skip-name-resolve innodb_file_per_table default_storage_engine=InnoDB user = mysql socket = /var/run/mysqld/mysqld.sock port = 3306 basedir = /usr datadir = /data/mysql tmpdir = /tmp skip-external-locking key_buffer = 512M max_allowed_packet = 128M thread_stack = 192K thread_cache_size = 64 myisam-recover = BACKUP max_connections = 500 table_cache = 812 table_definition_cache = 812 #query_cache_limit = 4M #query_cache_size = 512M join_buffer_size = 512K innodb_additional_mem_pool_size = 20M innodb_buffer_pool_size = 196G #innodb_file_io_threads = 4 #innodb_thread_concurrency = 12 innodb_flush_log_at_trx_commit = 1 innodb_log_buffer_size = 8M innodb_log_file_size = 1024M innodb_log_files_in_group = 2 innodb_max_dirty_pages_pct = 90 innodb_lock_wait_timeout = 120 log_error = /var/log/mysql/error.log long_query_time = 5 slow_query_log = 1 slow_query_log_file = /var/log/mysql/slowlog.log [mysqldump] quick quote-names max_allowed_packet = 16M [mysql] [isamchk] key_buffer = 16M

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  • Computer Networks UNISA - Chap 10 &ndash; In Depth TCP/IP Networking

    - by MarkPearl
    After reading this section you should be able to Understand methods of network design unique to TCP/IP networks, including subnetting, CIDR, and address translation Explain the differences between public and private TCP/IP networks Describe protocols used between mail clients and mail servers, including SMTP, POP3, and IMAP4 Employ multiple TCP/IP utilities for network discovery and troubleshooting Designing TCP/IP-Based Networks The following sections explain how network and host information in an IPv4 address can be manipulated to subdivide networks into smaller segments. Subnetting Subnetting separates a network into multiple logically defined segments, or subnets. Networks are commonly subnetted according to geographic locations, departmental boundaries, or technology types. A network administrator might separate traffic to accomplish the following… Enhance security Improve performance Simplify troubleshooting The challenges of Classful Addressing in IPv4 (No subnetting) The simplest type of IPv4 is known as classful addressing (which was the Class A, Class B & Class C network addresses). Classful addressing has the following limitations. Restriction in the number of usable IPv4 addresses (class C would be limited to 254 addresses) Difficult to separate traffic from various parts of a network Because of the above reasons, subnetting was introduced. IPv4 Subnet Masks Subnetting depends on the use of subnet masks to identify how a network is subdivided. A subnet mask indicates where network information is located in an IPv4 address. The 1 in a subnet mask indicates that corresponding bits in the IPv4 address contain network information (likewise 0 indicates the opposite) Each network class is associated with a default subnet mask… Class A = 255.0.0.0 Class B = 255.255.0.0 Class C = 255.255.255.0 An example of calculating  the network ID for a particular device with a subnet mask is shown below.. IP Address = 199.34.89.127 Subnet Mask = 255.255.255.0 Resultant Network ID = 199.34.89.0 IPv4 Subnetting Techniques Subnetting breaks the rules of classful IPv4 addressing. Read page 490 for a detailed explanation Calculating IPv4 Subnets Read page 491 – 494 for an explanation Important… Subnetting only applies to the devices internal to your network. Everything external looks at the class of the IP address instead of the subnet network ID. This way, traffic directed to your network externally still knows where to go, and once it has entered your internal network it can then be prioritized and segmented. CIDR (classless Interdomain Routing) CIDR is also known as classless routing or supernetting. In CIDR conventional network class distinctions do not exist, a subnet boundary can move to the left, therefore generating more usable IP addresses on your network. A subnet created by moving the subnet boundary to the left is known as a supernet. With CIDR also came new shorthand for denoting the position of subnet boundaries known as CIDR notation or slash notation. CIDR notation takes the form of the network ID followed by a forward slash (/) followed by the number of bits that are used for the extended network prefix. To take advantage of classless routing, your networks routers must be able to interpret IP addresses that don;t adhere to conventional network class parameters. Routers that rely on older routing protocols (i.e. RIP) are not capable of interpreting classless IP addresses. Internet Gateways Gateways are a combination of software and hardware that enable two different network segments to exchange data. A gateway facilitates communication between different networks or subnets. Because on device cannot send data directly to a device on another subnet, a gateway must intercede and hand off the information. Every device on a TCP/IP based network has a default gateway (a gateway that first interprets its outbound requests to other subnets, and then interprets its inbound requests from other subnets). The internet contains a vast number of routers and gateways. If each gateway had to track addressing information for every other gateway on the Internet, it would be overtaxed. Instead, each handles only a relatively small amount of addressing information, which it uses to forward data to another gateway that knows more about the data’s destination. The gateways that make up the internet backbone are called core gateways. Address Translation An organizations default gateway can also be used to “hide” the organizations internal IP addresses and keep them from being recognized on a public network. A public network is one that any user may access with little or no restrictions. On private networks, hiding IP addresses allows network managers more flexibility in assigning addresses. Clients behind a gateway may use any IP addressing scheme, regardless of whether it is recognized as legitimate by the Internet authorities but as soon as those devices need to go on the internet, they must have legitimate IP addresses to exchange data. When a clients transmission reaches the default gateway, the gateway opens the IP datagram and replaces the client’s private IP address with an Internet recognized IP address. This process is known as NAT (Network Address Translation). TCP/IP Mail Services All Internet mail services rely on the same principles of mail delivery, storage, and pickup, though they may use different types of software to accomplish these functions. Email servers and clients communicate through special TCP/IP application layer protocols. These protocols, all of which operate on a variety of operating systems are discussed below… SMTP (Simple Mail transfer Protocol) The protocol responsible for moving messages from one mail server to another over TCP/IP based networks. SMTP belongs to the application layer of the ODI model and relies on TCP as its transport protocol. Operates from port 25 on the SMTP server Simple sub-protocol, incapable of doing anything more than transporting mail or holding it in a queue MIME (Multipurpose Internet Mail Extensions) The standard message format specified by SMTP allows for lines that contain no more than 1000 ascii characters meaning if you relied solely on SMTP you would have very short messages and nothing like pictures included in an email. MIME us a standard for encoding and interpreting binary files, images, video, and non-ascii character sets within an email message. MIME identifies each element of a mail message according to content type. MIME does not replace SMTP but works in conjunction with it. Most modern email clients and servers support MIME POP (Post Office Protocol) POP is an application layer protocol used to retrieve messages from a mail server POP3 relies on TCP and operates over port 110 With POP3 mail is delivered and stored on a mail server until it is downloaded by a user Disadvantage of POP3 is that it typically does not allow users to save their messages on the server because of this IMAP is sometimes used IMAP (Internet Message Access Protocol) IMAP is a retrieval protocol that was developed as a more sophisticated alternative to POP3 The single biggest advantage IMAP4 has over POP3 is that users can store messages on the mail server, rather than having to continually download them Users can retrieve all or only a portion of any mail message Users can review their messages and delete them while the messages remain on the server Users can create sophisticated methods of organizing messages on the server Users can share a mailbox in a central location Disadvantages of IMAP are typically related to the fact that it requires more storage space on the server. Additional TCP/IP Utilities Nearly all TCP/IP utilities can be accessed from the command prompt on any type of server or client running TCP/IP. The syntaxt may differ depending on the OS of the client. Below is a list of additional TCP/IP utilities – research their use on your own! Ipconfig (Windows) & Ifconfig (Linux) Netstat Nbtstat Hostname, Host & Nslookup Dig (Linux) Whois (Linux) Traceroute (Tracert) Mtr (my traceroute) Route

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