Search Results

Search found 2503 results on 101 pages for 'danger cat'.

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

Page 38/101 | < Previous Page | 34 35 36 37 38 39 40 41 42 43 44 45  | Next Page >

  • .NET Framework - Possible memory-leaky classes?

    - by Robert Fraser
    Just the other day I was investigating a memory leak that was ballooning the app from ~50MB to ~130MB in under two minutes. Turns out that the problem was with the ConcurrentQueue class. Internally, the class stores a linked list of arrays. When an item is dequeued from the ConcurrentQueue, the index in the array is bumped, but the item remains in the array (i.e. it's not set to null). The entire array node is dropped after enough enqueues/dequeues, so it's not technically a leak, but if storing only a few large objects in the ConcurrentQueue, this can get out of hand fast. The documentation makes no note of this danger. I was wondering what other potential memory pitfalls are in the Base Class Library? I know about the Substring one (that is, if you call substring and just hold onto the result, the whole string will still be in memory). Any others you've encountered?

    Read the article

  • How can I get a list of linux users/group?

    - by Sergei
    Hello, guys, I need to get and filter the linux users list like: username1 username1_group username2 username2_group ... usernameN usernameN_group I've tried, but only that I've found is: cat /etc/passwd | grep /home | cut -d: -f1 It gives me the list of users in /home folder. But how can I add the group name to each of them? Thanks in advance!

    Read the article

  • Nagios shell script cannot be executed

    - by MeinAccount
    I'm trying to monitor GitLab with nagios. I've created the following command definition and shell script but when checking the service I'm receiving the following e-mail. How can I solve this? The file is executable. [...] nagios : 3 incorrect password attempts ; TTY=unknown ; PWD=/ ; USER=git ; COMMAND=/bin/bash -c /var/lib/nagios/custom_plugins/check_gitlab.sh Command definition: define command { command_name custom_check_gitlab command_line /var/lib/nagios/custom_plugins/check_gitlab.sh } Shell script: #! /bin/sh # [...] RAILS_ENV="production" # Script variable names should be lower-case not to conflict with internal /bin/sh variables such as PATH, EDITOR or SHELL. app_root="/home/git/gitlab" app_user="git" unicorn_conf="$app_root/config/unicorn.rb" pid_path="$app_root/tmp/pids" socket_path="$app_root/tmp/sockets" web_server_pid_path="$pid_path/unicorn.pid" sidekiq_pid_path="$pid_path/sidekiq.pid" ### Here ends user configuration ### # Switch to the app_user if it is not he/she who is running the script. if [ "$USER" != "$app_user" ]; then sudo -u "$app_user" -H -i $0 "$@"; exit; fi # Switch to the gitlab path, if it fails exit with an error. if ! cd "$app_root" ; then echo "Failed to cd into $app_root, exiting!"; exit 1 fi ### Init Script functions check_pids(){ if ! mkdir -p "$pid_path"; then echo "Could not create the path $pid_path needed to store the pids." exit 1 fi # If there exists a file which should hold the value of the Unicorn pid: read it. if [ -f "$web_server_pid_path" ]; then wpid=$(cat "$web_server_pid_path") else wpid=0 fi if [ -f "$sidekiq_pid_path" ]; then spid=$(cat "$sidekiq_pid_path") else spid=0 fi } # Checks whether the different parts of the service are already running or not. check_status(){ check_pids # If the web server is running kill -0 $wpid returns true, or rather 0. # Checks of *_status should only check for == 0 or != 0, never anything else. if [ $wpid -ne 0 ]; then kill -0 "$wpid" 2>/dev/null web_status="$?" else web_status="-1" fi if [ $spid -ne 0 ]; then kill -0 "$spid" 2>/dev/null sidekiq_status="$?" else sidekiq_status="-1" fi } check_pids check_status if [ "$web_status" != "0" -a "$sidekiq_status" != "0" ]; then echo "GitLab is not running." exit 2 fi if [ "$web_status" != "0" ]; then printf "The GitLab Unicorn webserver is \033[31mnot running\033[0m.\n" exit 1 fi if [ "$sidekiq_status" != "0" ]; then printf "The GitLab Sidekiq job dispatcher is \033[31mnot running\033[0m.\n" exit 1 fi if [ "$web_status" = "0" -a "$sidekiq_status" = "0" ]; then printf "GitLab and all it's components are \033[32mup and running\033[0m.\n" exit 0 fi

    Read the article

  • Does gunzip work in memory or does it write to disk?

    - by Ryan Detzel
    We have our log files gzipped to save space. Normally we keep them compressed and just do gunzip -c file.gz | grep 'test' to find important information but we're wondering if it's quicker to keep the files uncompressed and then do the grep. cat file | grep 'test' There has been some discussions about how gzip works if it would make sense that if it reads it into memory and unzips then the first one would be faster but if it doesn't then the second one would be faster. Does anyone know how gzip uncompresses data?

    Read the article

  • Is it possible to prevent SCP while still allowing SSH access?

    - by Jason
    Using Solaris and Linux servers and OpenSSH, is it possible to prevent users from copying files using "scp" while still allowing shell access with "ssh"? I realize that 'ssh $server "cat file" ' type file accesses are much harder to prevent, but I need to see about stopping "scp" for starters. Failing that, is there a way to reliably log all SCP access on the server side through syslog?

    Read the article

  • Why ethernet calbes must be ended with specific arrangement

    - by adopilot
    I just accepted that ethernet cables CAT 5 and more must be ended with specific arrangement. I learned when I ending my cables to take attention that either end must be in same arrangement(568A or 568B ). Sometime I get stacked with my fellow servant that they claim that Cable should work if just arrangement at both side are same even if it is not in 568A or 568B layouts. My experience said that it is not true, but I am now looking for some technical argument to prove that.

    Read the article

  • nginx + Jetty - thousands of connections stuck in LAST_ACK

    - by virulence
    I have a FreeBSD machine with jails -- two in particular, one that runs nginx and another that runs a Java program that accepts requests via Jetty (embedded mode) Jetty receives upwards of 500 requests/sec constantly and there has been an issue lately where I will constantly have over 60,000 connections in the LAST_ACK state between nginx and jetty. Distribution of all connections (includes some other services, particularly php-fpm) root@host:/root # netstat -an > conns.txt root@host:/root # cat conns.txt | awk '{print $6}' | sort | uniq -c | sort -n 18 LISTEN 112 CLOSING 485 ESTABLISHED 650 FIN_WAIT_2 1425 FIN_WAIT_1 3301 TIME_WAIT 64215 LAST_ACK Distribution of nginx - jetty connections root@host:/root # cat conns.txt | grep '10.10.1.57' | awk '{print $6}' | sort | uniq -c | sort -n 1 3 CLOSE_WAIT 3 LISTEN 18 FIN_WAIT_2 125 ESTABLISHED 64193 LAST_ACK I'd prefer every request to fully close the connection. Clients requests are about 10 minutes apart from each other so connections must be closed. Some of the connections, tcp4 0 0 10.10.1.50.46809 10.10.1.57.9050 LAST_ACK tcp4 0 0 10.10.1.50.46805 10.10.1.57.9050 LAST_ACK tcp4 0 0 10.10.1.50.46797 10.10.1.57.9050 LAST_ACK tcp4 0 0 10.10.1.50.46794 10.10.1.57.9050 LAST_ACK tcp4 0 0 10.10.1.50.46790 10.10.1.57.9050 LAST_ACK tcp4 0 0 10.10.1.50.46789 10.10.1.57.9050 LAST_ACK tcp4 0 0 10.10.1.50.46771 10.10.1.57.9050 LAST_ACK etc.. On Jetty's end I've set maxIdleTime to 2000 -- before this all connections were in ESTABLISHED but they are now LAST_ACK On Jetty's end I've set Connection: close (i.e response.setHeader(HttpHeaders.CONNECTION, HttpHeaderValues.CLOSE);) Jetty never reports a lot of open connections -- always very few. PF/IPFW is not currently being used nginx - reset_timedout_connection is on I cannot figure out how to get nginx or jetty to forcibly close the connection, is this simply something that needs to be fixed in Jetty so that it fully closes the socket after the request finishes? Thanks a lot in advance EDIT: forgot my nginx config for the proxy setup- proxy_pass http://10.10.1.57:9050; proxy_set_header HTTP_X_GEOIP $http_x_geoip; proxy_set_header GEOIP_COUNTRY_CODE $geoip_country_code; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $http_host; proxy_set_header Connection ""; proxy_http_version 1.1; EDIT2: Forcing Jetty to close the connection via request.getConnection().getEndPoint().close() does nothing -- it's obvious the connection IS being closed (as it's in LAST_ACK) but why isn't it getting past this? Is Nginx keeping the connection open to the backend for some reason?

    Read the article

  • Serial communication in between VM and ESX?

    - by user41685
    I am in verse to understand the serial communication between guest and host.I have just added a serial port through VI Client selecting "Use serial port on host"(host being ESX host).If I am on VM and run : ll /dev/ttyS0 I understand that it should get displayed through ESX Host. So On ESX Host, I typed: cat /dev/ttyS0 But nothing worked !!!

    Read the article

  • Console session stuck ESXi unsuported mode

    - by Datapimp23
    Hi guys, I was editing the /etc/inetd.conf file in VI to enable SSH and when I believed to have saved it. I entered cat and pressed enter accidently. Now I seem to be stuck in a black screen where I can enter characters but can't exit from it. How would I go on my way to get back to the normal console without rebooting the ESXi. Thanks

    Read the article

  • Can running object be garbage collected?

    - by Kugel
    I have a simple class: public class Runner { public void RunAndForget(RunDelegate method) { ThreadPool.QueueUserWorkItem(new WaitCallback(Run), method); } private void Run(object o) { ((RunDelegate )o).Invoke(); } } And if I use this like so: private void RunSomethingASync() { Runner runner = new Runner(); runner.FireAndForget(new RunDelegate(Something)); } Is there any danger using it like this? My C++ guts tell me that runner object should be destroyed after RunSomethingASync is finished. Am I right? What happens then to the method running on different thread? Or perhaps it is other way around and runner will not be collected? That would be a problem considering I may call RunSomethingASync() many times.

    Read the article

  • Should I convert overlong UTF-8 strings to their shortest normal form?

    - by Grant McLean
    I've just been reworking my Encoding::FixLatin Perl module to handle overlong UTF-8 byte sequences and convert them to the shortest normal form. My question is quite simply "is this a bad idea"? A number of sources (including this RFC) suggest that any over-long UTF-8 should be treated as an error and rejected. They caution against "naive implementations" and leave me with the impression that these things are inherently unsafe. Since the whole purpose of my module is to clean up messy data files with mixed encodings and convert them to nice clean utf8, this seems like just one more thing I can clean up so the application layer doesn't have to deal with it. My code does not concern itself with any semantic meaning the resulting characters might have, it simply converts them into a normalised form. Am I missing something. Is there a hidden danger I haven't considered?

    Read the article

  • Replicating iPhone Calendar View Lame?

    - by John Wright
    I am building an iPhone app that will need to display info primarily in a calendar view. Users will need to be able to search for entries and view them by day, month or in a list view. It seems like the built-in calendar type interface is ideal for my app. So I could build a similar calendar with 3 buttons at the bottom for list/day/month view as well as a button for today, in short a very similar interface to the built in iPhone calendar with different colors primarily. However, if I replicate it am I a) a lame copycat for replicating the built-in interface or smart for using a well-known iPhone metaphor and b) in danger of having my app rejected?

    Read the article

  • Run a local script on a remote server using ssh with out having to worry about quotes

    - by Michael Irey
    So I have been running local scripts fine on a remote server: ssh user@server '`cat local-script.sh`' However, today I have a script that has both single and double quotes in it. Which causes the script to fail because the output of cat local-script.sh is wrapped in quotes. With out modifying the script itself, is there a better way to handle this? I thought this may work: ssh user@server $(<local-script.sh) But is does not seem to do anything...

    Read the article

  • forcing Management Studio to use alter table instead of drop/recreate

    - by marco
    Hi! I'm wondering if is there a way to force MSSQL Management Studio to produce a script like this: ALTER TABLE Mytable ADD MyCol bit NOT NULL CONSTRAINT MyColDefault DEFAULT 0 WITH VALUES ALTER TABLE [dbo].Mytable ALTER COLUMN MyCol2 int NULL GO when I alter a very simple property of a column on a table. If I do this in the designer and ask for the produced script, the script doesn't do such simple tasks, but instead copies all the data in a tmp table, drops the original table, renames the tmp table with the original table name. And, of course, drops and recreates every constraint and relationships. Is there any option I can change to change this behaviour? Or, this may be possible, is there some danger I don't see in using the simple ALTER TABLE above? thanks.

    Read the article

  • Ubuntu karmic doesn't have the version file?

    - by Blankman
    I was following this tutorial: http://articles.slicehost.com/2010/4/23/ubuntu-karmic-setup-part-2 On my ubuntu karmic version (on ec2, ami from elastic) I don't see this file: cat /etc/lsb-release It just isn't there. How can I see the version of the O/S? And shouldn't that file be there? Some people have told me ubuntu isn't really used as a server, is that true or is the trend making it more viable?

    Read the article

  • C# : What if a static method is called from multiple threads?

    - by Holli
    In my Application I have a static method that is called from multiple threads at the same time. Is there any danger of my data being mixed up? In my first attempt the method was not static and I was creating multiple instance of the class. In that case my data got mixed up somehow. I am not sure how this happens because it only happens sometimes. I am still debugging. But now the method is static on I have no problems so far. Maybe it's just luck. I don't know for sure.

    Read the article

  • Failed to start up after upgrading software in ubuntu 10.10

    - by Landy
    I've been running Ubuntu 10.10 in a physical x86-64 machine. Today Update Manager reminded me that there are some updates to install and I confirmed the action. I should had read the update list but I didn't. I can only remember there is an update about cups. After the upgrading, Update Manager requires a restart and I confirmed too. But after the restart, the computer can't start up. There are errors in the console. Begin: Running /scripts/init-premount ... done. Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done. [xxx]usb 1-8: new high speed USB device using ehci_hcd and address 3 [xxx]usb 2-1: new full speed USB device using ohci_hcd and address 2 [xxx]hub 2-1:1.0: USB hub found [xxx]hub 2-1:1.0: 4 ports detected [xxx]usb 2-1.1: new low speed USB device using ohci_hcd and address 3 Gave up waiting for root device. Common probles: - Boot args (cat /proc/cmdline) - Check rootdelay=(did the system wait long enough) - Check root= (did the system wait for the right device?) - Missing modules (cat /proc/modules; ls /dev) FATAL: Could not load /lib/modules/2.6.35-22-generic/modules.dep: No such file or directory FATAL: Could not load /lib/modules/2.6.35-22-generic/modules.dep: No such file or directory ALERT! /dev/sda1 does not exist. Dropping to a shell! BusyBox v1.15.3 (Ubuntu 1:1.15.3-1ubuntu5) built-in shell(ash) Enter 'help' for a list of built-in commands. (initramfs)[cursor is here] At the moment, I can't input anything in the console. The keyboard doesn't work at all. What's wrong? How can I check boot args or "root=" as suggested? How can I fix this issue? Thanks. =============== PS1: the /dev/sda1 is type ext4 (rw,nosuid,nodev) PS2: the /dev/sda1 can be mounted and accessed successfully under SUSE 11 SP1 x64.

    Read the article

  • A good approach to db planing for reporting service

    - by Itay Moav
    The scenario: Big system (~200 tables). 60,000 users. Complex reports that will require me to do multiple queries for each report and even those will be complex queries with inner queries all over the place + some processing in PHP. I have seen an approach, which I am not sure about: Having one centralized, de-normalized, table that registers any activity in the system which is reportable. This table will hold mostly foreign keys, so she should be fairly compact and fast. So, for example (My system is a virtual learning management system), A user enrolls to course, the table stores the user id, date, course id, organization id, activity type (enrollment). Of course I also store this data in a normalized DB, which the actual application uses. Pros I see: easy, maintainable queries and code to process data and fast retrieval. Cons: there is a danger of the de-normalized table to be out of sync with the real DB. Is this approach worth considering, or (preferably from experience) is total $#%#%t?

    Read the article

  • How to interpret the contents of /proc/bus/pci/devices ?

    - by vivekian2
    The first few fields of 'cat /proc/bus/pci/devices' are understandable. Field 1 - BusDevFunc Field 2 - Vendor Id + Device Id Field 3 - Interrupt Line Field 4 - BAR 0 and the rest of the BAR registers (0 - 5) after that. After the BAR registers are printed out, what are the other fields? Specifically, what PCI configuration space registers(offsets) are printed out?

    Read the article

  • How do I tell mdadm to start using a missing disk in my RAID5 array again?

    - by Jon Cage
    I have a 3-disk RAID array running in my Ubuntu server. This has been running flawlessly for over a year but I was recently forced to strip, move and rebuild the machine. When I had it all back together and ran up Ubuntu, I had some problems with disks not being detected. A couple of reboots later and I'd solved that issue. The problem now is that the 3-disk array is showing up as degraded every time I boot up. For some reason it seems that Ubuntu has made a new array and added the missing disk to it. I've tried stopping the new 1-disk array and adding the missing disk, but I'm struggling. On startup I get this: root@uberserver:~# cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md_d1 : inactive sdf1[2](S) 1953511936 blocks md0 : active raid5 sdg1[2] sdc1[3] sdb1[1] sdh1[0] 2930279808 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU] I have two RAID arrays and the one that normally pops up as md1 isn't appearing. I read somewhere that calling mdadm --assemble --scan would re-assemble the missing array so I've tried first stopping the existing array that ubuntu started: root@uberserver:~# mdadm --stop /dev/md_d1 mdadm: stopped /dev/md_d1 ...and then tried to tell ubuntu to pick the disks up again: root@uberserver:~# mdadm --assemble --scan mdadm: /dev/md/1 has been started with 2 drives (out of 3). So that's started md1 again but it's not picking up the disk from md_d1: root@uberserver:~# cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md1 : active raid5 sde1[1] sdf1[2] 3907023872 blocks level 5, 64k chunk, algorithm 2 [3/2] [_UU] md_d1 : inactive sdd1[0](S) 1953511936 blocks md0 : active raid5 sdg1[2] sdc1[3] sdb1[1] sdh1[0] 2930279808 blocks level 5, 64k chunk, algorithm 2 [4/4] [UUUU] What's going wrong here? Why is Ubuntu trying to pick up sdd into a different array? How do I get that missing disk back home again? [Edit] - After adding the md1 to mdadm.conf it now tries to mount the array on startup but it's still missing the disk. If I tell it to try and assemble automatically I get the impression it know it needs sdd but can't use it: root@uberserver:~# mdadm --assemble --scan /dev/md1: File exists mdadm: /dev/md/1 already active, cannot restart it! mdadm: /dev/md/1 needed for /dev/sdd1... What am I missing?

    Read the article

  • how do I start GIT daemon automatically under CentOS 4.8 ?

    - by ck2
    Apparently my server is running CentOS 4.8 with Cpanel uname -a 2.6.9-023stab048.6-enterprise #1 SMP MSK 2008 i686 i686 i386 GNU/Linux cat /etc/redhat-release CentOS release 4.8 (Final) I'd prefer to install it as a service but I cannot seem to install "yum git-daemon" there is no package available for CentOS 4.8 (when I try to include another repos for it I get too many dependency failures) So what's the easiest way to just start it? Typically this is how I do it from CLI git daemon --detach --user=git --group=git Thanks for any help!

    Read the article

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

< Previous Page | 34 35 36 37 38 39 40 41 42 43 44 45  | Next Page >