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  • using curl command to download file in parts from different interfaces and to run the commands simultaneously from a script

    - by jsjain007
    i wanted to download a file using curl command simultaneously in different parts using ip aliasing(virtual Ethernet ports) so what i did was pasted the commands in a text file and run but the problem as obvious since it is in a file the commands will be executed one by one so is there a way to run all those commands simultaneously. here is the command curl --interface eth0:0 --range 0,38010880 http://wdl.cache.ijinshan.com/wps/download/Linux/unstable/kingsoft-office_9.1.0.4244~a12p3_i386.deb -o kinsoft-office.part1 curl --interface eth0:1 --range 38010880 ,- http://wdl.cache.ijinshan.com/wps/download/Linux/unstable/kingsoft-office_9.1.0.4244~a12p3_i386.deb -o kinsoft-office.part2 cat kinsoft-office.part*>kinsoft-office can anyone help me to run these above 2 commands simultaneously from the script so as to increase download speed

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  • Is there a POSIX pathname that can't name a file?

    - by Charles Stewart
    Are there any legal paths in POSIX that cannot be associated with a file, regular or irregular? That is, for which test -e "$LEGITIMATEPOSIXPATHNAME" cannot succeed? Clarification #1: pathnames By "legal paths in POSIX", I mean ones that POSIX says are allowed, not ones that POSIX doesn't explicitly forbid. I've looked this up, and the are POSIX specification calls them character strings that: Use only characters from the portable filename character set [a-zA-Z0-9._-] (cf. http://www.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap03.html#tag_03_276); Do not begin with -; and Have length between 1 and NAME_MAX, a number unspecified for POSIX that is not less than 14. POSIX also allows that filesystems will probably be more relaxed than this, but it forbids the characters NUL and / from appearing in filenames. Note that such a paradigmatically UNIX filename as lost+found isn't FPF, according to this def. There's another constant PATH_MAX, whose use needs no further explanation. The ideal answer will use FPFs, but I'm interested in any example with filenames that POSIX doesn't expressly forbid. Clarification #2: impossibility Obviously, pathnames normally could be bound to a file. But UNIX semantics will tell you that there are special places that couldn't normally have arbitrary files created, like in the /dev directory. Are any such special places stipulated in POSIX? That is what the question is getting after.

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  • Remote Socket Read In Multi-Threaded Application Returns Zero Bytes or EINTR (104)

    - by user39891
    Hi. Am a c-coder for a while now - neither a newbie nor an expert. Now, I have a certain daemoned application in C on a PPC Linux. I use PHP's socket_connect as a client to connect to this service locally. The server uses epoll for multiplexing connections via a Unix socket. A user submitted string is parsed for certain characters/words using strstr() and if found, spawns 4 joinable threads to different websites simultaneously. I use socket, connect, write and read, to interact with the said webservers via TCP on their port 80 in each thread. All connections and writes seems successful. Reads to the webserver sockets fail however, with either (A) all 3 threads seem to hang, and only one thread returns -1 and errno is set to 104. The responding thread takes like 10 minutes - an eternity long:-(. *I read somewhere that the 104 (is EINTR?), which in the network context suggests that ...'the connection was reset by peer'; or (B) 0 bytes from 3 threads, and only 1 of the 4 threads actually returns some data. Isn't the socket read/write thread-safe? I use thread-safe (and reentrant) libc functions such as strtok_r, gethostbyname_r, etc. *I doubt that the said webhosts are actually resetting the connection, because when I run a single-threaded standalone (everything else equal) all things works perfectly right, but of course in series not parallel. There's a second problem too (oops), I can't write back to the client who connect to my epoll-ed Unix socket. My daemon application will hang and hog CPU 100% for ever. Yet nothing is written to the clients end. Am sure the client (a very typical PHP socket application) hasn't closed the connection whenever this is happening - no error(s) detected either. Any ideas? I cannot figure-out whatever is wrong even with Valgrind, GDB or much logging. Kindly help where you can.

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  • netstat on fresh install of Solaris 10 update 9

    - by cjavapro
    I am attempting to decipher the below output bash-3.00$ netstat -a UDP: IPv4 Local Address Remote Address State -------------------- -------------------- ---------- *.sunrpc Idle *.* Unbound *.32771 Idle TCP: IPv4 Local Address Remote Address Swind Send-Q Rwind Recv-Q State -------------------- -------------------- ----- ------ ----- ------ ----------- *.* *.* 0 0 49152 0 IDLE *.sunrpc *.* 0 0 49152 0 LISTEN *.* *.* 0 0 49152 0 IDLE localhost.5987 *.* 0 0 49152 0 LISTEN localhost.898 *.* 0 0 49152 0 LISTEN localhost.32771 *.* 0 0 49152 0 LISTEN localhost.5988 *.* 0 0 49152 0 LISTEN localhost.32772 *.* 0 0 49152 0 LISTEN *.ssh *.* 0 0 49152 0 LISTEN *.32785 *.* 0 0 49152 0 BOUND localhost.6788 *.* 0 0 49152 0 LISTEN localhost.6789 *.* 0 0 49152 0 LISTEN localhost.32782 *.* 0 0 49152 0 LISTEN localhost.smtp *.* 0 0 49152 0 LISTEN localhost.submission *.* 0 0 49152 0 LISTEN server-host-name.ssh pc-host-name.51269 64868 51 49640 0 ESTABLISHED TCP: IPv6 Local Address Remote Address Swind Send-Q Rwind Recv-Q State If --------------------------------- --------------------------------- ----- ------ ----- ------ ----------- ----- *.* *.* 0 0 49152 0 IDLE *.ssh *.* 0 0 49152 0 LISTEN SCTP: Local Address Remote Address Swind Send-Q Rwind Recv-Q StrsI/O State ------------------------------- ------------------------------- ------ ------ ------ ------ ------- ----------- 0.0.0.0 0.0.0.0 0 0 102400 0 32/32 CLOSED Active UNIX domain sockets Address Type Vnode Conn Local Addr Remote Addr ffffffff84e25ab8 stream-ord ffffffff8569c740 00000000 /var/run/.inetd.uds bash-3.00$ It looks to me like we have the following items UDP IPv4 Open ports sunrpc, 32771 Question 1: What is *.* Unbound? TCP IPv4 Open ports sunrpc, ssh 10 ports open only for localhost The open ssh connection from my PC Question 2: What is *.32785 *.* 0 0 49152 0 BOUND? Question 3: What is *.* *.* 0 0 49152 0 IDLE? (shows up twice) IPv6 Open port ssh Question 3: What is *.* *.* 0 0 49152 0 IDLE? Question 4: What is SCTP? Question 5: What is Active UNIX domain sockets

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  • Colorizing your terminal and shell environment?

    - by Stefan Lasiewski
    I spend most of my time working in Unix environments and using Terminal emulators. I try to use color on the commandline, because color makes the output more useful and intuitive. What are some good ways to add color to my terminal environment? What tricks do you do? What pitfals have you encountered? Unfortunately, support for color is wildly variable depending on terminal type, OS, TERM setting, utility, buggy implementations, etc. Here's what I do currently, after alot of experimentation: I tend to set 'TERM=xterm-color', which is supported on most hosts (but not all). I work on a number of different hosts, different OS versions, etc. I'm trying to keep things simple and generic, if possible. Many OSs set things like 'dircolors' and by default, and I don't want to modify this everywhere. So I try to stick with the defaults. Instead tweak my Terminal's color configuration. Use color for some unix commands (ls, grep, less, vim) and the Bash prompt. These commands seem to the standard "ANSI escape sequences" I've managed to find some settings which are widely supported, and which don't print gobbledygook characters in older environments (even FreeBSD4!) (For the most part). From my .bash_profile ### Color support # The Terminal application typically does 'export TERM=term=color' # Some terminal types will print Black, White & underlined with these settings. OS=`uname -s` case "$OS" in "SunOS" ) # Solaris9 ls doesn't allow color, so use special characters instead. LS_OPTS='-F' ;; "Linux" ) # GNU tools supports colors! See dircolors to customize colors export LS_OPTS='--color=auto' # Color support using 'less -R' alias less='less --RAW-CONTROL-CHARS' alias ls='ls ${LS_OPTS} export GREP_OPTIONS="--color=auto" ;; "Darwin"|"FreeBSD") # Most FreeBSD & Apple Darwin supports colors # LS_OPTS="-G" export CLICOLOR=true alias less='less --RAW-CONTROL-CHARS' export GREP_OPTIONS="--color=auto" ;; esac

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  • Spreadsheet application that can handle big data OS X

    - by Peter
    I've been working with Excel for quite a while for some statistical analysis that I do regularly. The size of the data that I'm working with has gotten much larger as of late, however. The layout of the databases in question is quite simple, usually just three rows which includes a UNIX timestamp, and EST value, a proprietary numeric value and finally an average of the rows that have a timestamp +/- 1000 that row's timestamp (little AVERAGEIFS() formula). That formula and the EST conversion are the only formulas in the sheet. I'm beginning to work with files with 500,000+ rows. Running the average formula down the entire row takes forever. The end result is the production of print-worthy graphs. I'm looking for either a UNIX CL utility or separate spreadsheet/database application that can handle this amount of data without melting my CPU or making me wait an hour. Is there anything out there? TL;DR: Simple excel sheet with over half a million rows is getting too slow to work with. OS X alternatives?

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  • Patch management on multiple systems

    - by Pierre
    I'm in charge of auditing the security configuration of an important farm of Unix servers. So far, I came up with a way to assess the basic configuration but not the installed updates. The very problem here is that I just can't trust the package management tools on those machine. Indeed some of them did not sync with the repository for a long time (So I can't do a "yum check-updates" on Redhat for example). Some of those servers are not even connected to the internet and use an company repository. Another problem is that I have multiple target systems: AIX, Debian, Centos/Redhat, etc... So the version could be different (AIX) and the tools available will be different. And, last but not least, I can't install anything on the target system. So I need to use a script to retrieve the information and either: process it directly or save the information to be able to process it later on a server (Which may happen to run a different distribution than the one on which the information have been retrieved). The best ideas I could come up with were: either retrieve the list of installed packages on the machine (dpkg -l for example on debian) and process it on a dedicated server (Directly parsing the "Packages" file of debian repositories). Still, the problem remains the same for AIX and Redhat... or use Nessus' scripts to assess vulnerability on the installed packages, but I find this a bit dirty. Does anyone know any better/efficient way of doing this ? P.S: I already took time to review some answers to similar problems. Unfortunately Chef, puppet, ... don't meet the requirements I have to meet. Edit: Long story short. I need to have the list of missing updates on a Unix system just like MBSA on Windows. I'm not authorized to install anything on this system as it's not mine. All I have are scripts languages. Thanks.

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  • Modelling problem - Networked devices with commands

    - by Schneider
    I encountered a head scratching modelling problem today: We are modelling a physical control system composed of Devices and NetworkDevices. Any example of a Device is a TV. An example of a NetworkDevice is an IR transceiver with Ethernet connection. As you can see, to be able to control the TV over the internet we must connect the Device to the NetworkDevice. There is a one to many relationship between Device and NetworkDevice i.e. TV only has one NetworkDevice (the IR transceiver), but the IR transceiver may control many Devices (e.g. many TVs). So far no problem. The complicated bit is that every Device has a collection of Commands. The type of the Command (e.g IrCommand, SerialCommand - N.B. not currently modelled) depends on the type of NetworkDevice that the Device is connected to. In the current legacy system the Device has a collection of generic Commands (no typing) where fields are "interpreted" depending on the NetworkDevice type. How do I go about modelling this in OOP such that: You can only ever add a Command of the appropriate type, given the NetworkDevice the Device is attached to? If I change the NetworkDevice the Commands collection changes to the appropriate type Make it so the API is simple/elegant/intuitive to use

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  • NSURLConnection and Basic HTTP Authentication

    - by Justin Galzic
    I need to invoke an initial GET HTTP request with Basic Authentication. This would be the first time the request is sent to the server and I already have the username & password so there's no need for a challenge from the server for authorization. First question: 1) Does NSUrlConnection have to be set as synchronous to do Basic Auth? According to the answer on this post, it seems that you can't do Basic Auth if you opt for the async route. 2) Anyone know of any some sample code that illustrates Basic Auth on a GET request without the need for a challenge response? Apple's documentation shows an example but only after the server has issued the challenge request to the client. I'm kind of new the networking portion of the SDK and I'm not sure which of the other classes I should use to get this working. (I see the NSURLCredential class but it seems that it is used only with NSURLAuthenticationChallenge after the client has requested for an authorized resource from the server).

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  • Cannot install Office 2003 Professional on a machine which formerly had 2003 Basic

    - by Paul
    Hi to all, I have a problem with one of our PCs. I've inherited this PC and it's always had MS Office basic on it; the time has come to install our Access application on it, so I'm trying to install Office Professional 2003, the problem I have is the installer says the license key is invalid; I can only assume this is down to the fact that the PC used to have Office Basic installed. I've deleted the registration keys for the OFFICE11 section of the registry, but am still getting the problem... Any suggestions as to how to kill any trace of the old install would be appreciated - its' no longer showing up in the add/remove programs window.

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  • Install Office 2003 professional over Office 2003 Basic?

    - by Paul
    I have a problem with one of our PCs. I've inherited this PC and it's always had MS Office Basic on it. The time has come to install our Access application on it, so I'm trying to install Office Professional 2003. The problem I have is the installer says the license key is invalid. I can only assume this is down to the fact that the PC used to have Office Basic installed. I've deleted the registration keys for the OFFICE11 section of the registry, but am still getting the problem. Any suggestions as to how to kill any trace of the old install would be appreciated - it's no longer showing up in the add/remove programs window.

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  • Rewriting UNIX cal(1)

    - by dharmatech
    Hello, Today I was testing out SRFI 19 and wrote a simple version of the UNIX cal(1) command. Here's a version in R6RS Scheme which runs in Ikarus and Ypsilon. A few example runs. Schemers: How would you write it? Use your favorite implementation. Ruby and Python: I'm guessing that y'all have elegant date and time libraries. I'm sure you can put the Schemers to shame. ;-) Let's see what ya got. I'd also like to see Haskell and golfed versions. Is there a Stack Overflow tag for re-implementations of UNIX commands? :-) Ed

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  • generalizing the pumping lemma for UNIX-style regular expressions

    - by Avi
    Most UNIX regular expressions have, besides the usual *,+,? operators a backslash operator where \1,\2,... match whatever's in the last parentheses, so for example L=(a)b\1* matches the (non regular) language a^n b a^n On one hand, this seems to be pretty powerful since you can create (a*)b\1b\1 to match the language a^n b a^n b a^n which can't even be recognized by a stack automaton. On the other hand, I'm pretty sure a^n b^n cannot be expressed this way. Two questions: 1. Is there any literature on this family of languages (UNIX-y regular). In particular, is there a version of the pumping lemma for these? 2. Can someone prove (or perhaps disprove) that a^n b^n cannot be expressed this way? Thanks

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  • Can't send commands via SSH to Juniper firewalls

    - by Massimo
    I have some Juniper SSG firewalls which I need to manage, and I'd like to be able to send commands to them from some monitoring scripts. I configured SSH access using public keys, and I'm able to automatically login to the firewalls. When I run SSH interactively, everything works fine: $ssh <firewall IP> FIREWALL-> <command> <command output> FIREWALL-> exit Connection to <firewall IP> closed. $ But when I try to run the command from the command line, it doesn't work: $ssh <firewall IP> <command> $ This, of course, works fine when sending a command to a remote Linux box: $ssh <linux box IP> <command> <command output> $ Why is this happening? What is the difference between running SSH interactively and specifying the command to run on the SSH command line? Update: It also works fine with a Cisco router. Only these Juniper firewalls seem to behave this way. From the debug output from SSH, it looks like the connection gets established correctly, but the Juniper box replies with an EOF when sending the command, while instead the Linux box replies with the actual command output: Linux: debug1: Authentication succeeded (publickey). debug1: channel 0: new [client-session] debug2: channel 0: send open debug1: Entering interactive session. debug2: callback start debug2: client_session2_setup: id 0 debug1: Sending command: uptime debug2: channel 0: request exec confirm 0 debug2: callback done debug2: channel 0: open confirm rwindow 0 rmax 32768 debug2: channel 0: rcvd adjust 131072 debug1: client_input_channel_req: channel 0 rtype exit-status reply 0 16:44:44 up 25 days, 1:06, 3 users, load average: 0.08, 0.02, 0.01 debug2: channel 0: rcvd eof debug2: channel 0: output open -> drain debug2: channel 0: obuf empty debug2: channel 0: close_write debug2: channel 0: output drain -> closed debug2: channel 0: rcvd close debug2: channel 0: close_read debug2: channel 0: input open -> closed debug2: channel 0: almost dead debug2: channel 0: gc: notify user debug2: channel 0: gc: user detached debug2: channel 0: send close debug2: channel 0: is dead debug2: channel 0: garbage collecting debug1: channel 0: free: client-session, nchannels 1 debug1: Transferred: stdin 0, stdout 0, stderr 0 bytes in 0.1 seconds debug1: Bytes per second: stdin 0.0, stdout 0.0, stderr 0.0 debug1: Exit status 0 Juniper: debug1: Authentication succeeded (publickey). debug1: channel 0: new [client-session] debug2: channel 0: send open debug1: Entering interactive session. debug2: callback start debug2: client_session2_setup: id 0 debug1: Sending environment. debug1: Sending env LANG = en_US.UTF-8 debug2: channel 0: request env confirm 0 debug1: Sending command: get system debug2: channel 0: request exec confirm 0 debug2: callback done debug2: channel 0: open confirm rwindow 2048 rmax 1024 debug2: channel 0: rcvd eof debug2: channel 0: output open -> drain debug2: channel 0: obuf empty debug2: channel 0: close_write debug2: channel 0: output drain -> closed debug1: client_input_channel_req: channel 0 rtype exit-status reply 0 debug2: channel 0: rcvd close debug2: channel 0: close_read debug2: channel 0: input open -> closed debug2: channel 0: almost dead debug2: channel 0: gc: notify user debug2: channel 0: gc: user detached debug2: channel 0: send close debug2: channel 0: is dead debug2: channel 0: garbage collecting debug1: channel 0: free: client-session, nchannels 1 debug1: Transferred: stdin 0, stdout 0, stderr 0 bytes in 0.2 seconds debug1: Bytes per second: stdin 0.0, stdout 0.0, stderr 0.0 debug1: Exit status 1

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  • Reading file resource in Unix and MacOS

    - by Sanjeev
    Hi, I am writing my first wxWidgets application which aims to be cross-platform. The program uses dll file for plugins and in Windows, reads dll resource part for information regarding plugin name, author name etc. I have never used Unix or MacOS (little Linux though) and am wondering whether compiling binary for these other OSes will require changes to the code written for Windows. For instance, is there a DLL equivalent in Unix and MacOS? Are there any provisions of compiling resource strings and files into a such files? Thanks, Sanjeev

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  • apache redirect to https for basic auth

    - by shreddd
    I have a tricky variation on an old problem. I have an apache based site that should generally be accessed via http/port 80. However for certain areas protected areas that require authentication (designated by .htaccess), I want to be able to redirect the user the https/port 443. The key here is that I want this to always happen - i.e. I don't want to have to rewrite each htaccess file with a redirect. I only want to enforce this for basic authentication and the protected areas are scattered all over the site. Is it possible to somehow redirect all basic authentication requests to the SSL host?

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  • Allow from referer for HTTP-basic protected SSL apache site

    - by user64204
    I have an apache site protected by HTTP basic authentication. The authentication is working fine. Now I would like to bypass authentication for users that are coming from a particular website by relying on the HTTP Referer header. Here is the configuration: SetEnvIf Referer "^http://.*.example\.org" coming_from_example_org <Directory /var/www/> Options Indexes FollowSymLinks MultiViews AllowOverride None Deny from all Allow from env=coming_from_example_org AuthName "login required" AuthUserFile /opt/http_basic_usernames_and_passwords AuthType Basic Require valid-user Satisfy Any </Directory> This is working fine for HTTP, but failing for HTTPS. My understanding is that in order to inspect the HTTP headers, the SSL handshake must be completed, but apache wants to inspect the <Directory> directives before doing the SSL handshake, even if I place them at the bottom of the configuration file. Q: How could I workaround this issue? PS: I'm not obsessed with the HTTP referer header, I could use other options that would allow users from a known website to bypass authantication.

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  • Dynamic Disk: Revert back to basic or...?

    - by someguy
    When I was trying to create a new partition (via Disk Management) it warned me that the disk would be dynamic, but I thought it meant the partition and went ahead. Now, my hard disk, which has the main C partition, is dynamic. I haven't shut down the computer, and I'm not sure what the consequences are. Should I revert back to basic or...? What ever happens, I don't want to lose my data. Edit: I think I should mention that I don't know how to revert back to basic...

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  • Is there a alternative to DCOM on unix?

    - by comguy
    Hi All, Is there a COM implementation on UNIX platform. My requirements is that I have a COM client on windows , But I want the server on a AIX servers. I want to write COM clients and servers on unix platforms. Is there anyway to do this?. I tried looking for EntireX from software ag, but couldn't find it. also tried other commercial implementation of DCOM .like COMbridge , Java com bridge. But I need a open source production ready alternative. Am I asking for too much? Thanks all

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  • advance/basic and smartphone views in Rails

    - by aleds
    In a new Rail app I have to consider 2 differents user's type: basic and Advanced and I have to create smartphone views( unique view for both user's type). Then I have 3 view/layout: - web advance - web basic - smartphone I already have the adv/basic flag for the user, and I followed the RBates tutorial http://asciicasts.com/episodes/199-mobile-devices. What is the best way to manage the 3 views/layout ?

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  • Writing bash script for X-11 forwarding

    - by Bruce
    I was having problem with SSH X-11 forwarding while I used sudo. I found a solution for it. $hostname server4.a.b.edu First I do: $ echo $DISPLAY localhost:10.0 then $ xauth list server1.a.b.edu/unix:12 MIT-MAGIC-COOKIE-1 6026864294a0e081ac452e8740bcd0fe server4.a.b.edu/unix:10 MIT-MAGIC-COOKIE-1 f01fbfe0c0d68e30b45afe3829b27e58 Then I need to do $ sudo xauth add server4.a.b.edu/unix:10 MIT-MAGIC-COOKIE-1 f01fbfe0c0d68e30b45afe3829b27e58 for sudo to work, for the cookie with my server name and display. How do I write a bash script to automate this?

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