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  • MySQL wants a password but it's empty

    - by gAMBOOKa
    mysql -uroot ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) mysql -uroot -p Enter password: <-- leave blank, hit enter without entering anything mysql> <-- i am logged in NOTE: This is a new mysql instance installation So if the password is blank, why won't it log me in without a -p flag? For a little clarification. I am running into this issue when attempting to change the password using a script: We're using a bash script to do that. mysqladmin -u root password abc wouldn't work (access denied) mysqladmin -u root -p password abc cannot be used because it prompts for a password and we need to automate this. mysqladmin -u root -p'' password abc is not working either

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  • System time is off in Fedora

    - by NoClue
    I have a desktop PC with Fedora, Ubuntu and Windows installed and grub used for multibooting. But time in Fedora is always 5 hours behind. If I change the time in Fedora, then Windows and Ubuntu will be 5 hours ahead of the current time. I don't understand how to fix it. Any ideas? All the timezone settings in Fedora, Ubuntu and Windows are the same.

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  • Running out of LowMem with Ubuntu PAE Kernel and 32GB of RAM

    - by magneticMonster
    I'm running a Java data import process on a 32-bit Ubuntu 10 PAE kernel machine. After running the process for a while, the oom-killer zaps my Java process. After some Googling and digging through docs, it looks like the system is running out of LowMem. I started the process for the third time and am watching free -lm show me Low: 464 386 77 with the free value (77MB) slowly decreasing. Why am I running out of lowmem and how do I increase it? Some details: $ cat /proc/sys/vm/lowmem_reserve_ratio 256 256 32 $ free -lm total used free shared buffers cached Mem: 32086 24611 7475 0 0 24012 Low: 464 407 57 High: 31621 24204 7417 -/+ buffers/cache: 598 31487 Swap: 2047 0 2047

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  • How to run a program and get its PID in the background

    - by Ivan
    I have a Minecraft server startup script that looks like this: #!/bin/bash cd "$(dirname "$0")" exec java -Xmx4096M -Xms4096M -jar minecraft_server.jar How do I get java process's PID while being able to enter input into the Java process? if I change the exec line to exec java -Xmx4096M -Xms4096M -jar minecraft_server.jar & echo $! > pid it won't let me input any text into the Minecraft server java process.

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  • startx error no desktop manager

    - by WikiWitz
    I have Backtrack 5R2 KDE. I started recovery mode and did a failsafe xorg configuration. After that, I cannot load the KDE manager when I enter the startx command after logging in. Whenever I do a startx command (as root), the result resembles the following: This is not the actual output (I just drew this with MS paint because I cannot do a printscreen). The screen is just black with the icon in the upper left corner. The other pop-up menu appears when left-clicking the mouse. I tried the cp xorg.conf.failsafe xorg.conf advice from other websites with no luck. I have also tried the 'reconfigure option(s)' form the recovery mode with no success.

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  • Cannot boot NixOS Install CD

    - by InFreefall
    I am trying to install NixOS on an Acer laptop. When I try to boot off of the install CD, the system starts up and shows the Acer logo. Then, the boot menu of the CD appears, but it only displays on the top left corner of the screen. The rest of the screen still shows the Acer logo. If I try to select "boot" from the menu, that area of the screen goes black, and nothing else happens. I tried adding "nomodeset" to the boot arguments, but that did not affect anything. Are there any other boot arguments or anything else that could fix this?

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  • How to delete files quicker than rm -rf?

    - by Byakugan
    Is there any way how to delete folder/files quicker than with command rm -rf? It seems my disc is filled with bilions of files (sessions of php5) which were not deleted in cron so I need to delete them manually but it takes hours and it is still not helping reducing the amount. Thank you. My command: rm -rf /var/lib/php5/* Tried also these commands: find /var/lib/php5 -name "sess_*" -exec rm {} \; And perl -e 'chdir "/var/lib/php5/" or die; opendir D, "."; while ($n = readdir D) { unlink $n }'

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  • external drive and CentOS - Reset high speed USB device number

    - by Phil
    I have 2 external drives (3TB) and both will not work with my centOS Box. Tested them in windows ( different machine ) No problems ( 2.6.32-279.9.1.el6.i686 ) dmesg reports: usb 2-2: new high speed USB device number 3 using ehci_hcd usb 2-2: New USB device found, idVendor=2109, idProduct=0700 usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 2-2: Product: USB 3.0 SATA Bridge usb 2-2: Manufacturer: VIA Labs, Inc. usb 2-2: SerialNumber: 0000000000006121 usb 2-2: configuration #1 chosen from 1 choice scsi6 : SCSI emulation for USB Mass Storage devices usb-storage: device found at 3 usb-storage: waiting for device to settle before scanning usb-storage: device scan complete scsi 6:0:0:0: Direct-Access ST3000DM 001-9YN166 CC4B PQ: 0 ANSI: 2 sd 6:0:0:0: Attached scsi generic sg3 type 0 sd 6:0:0:0: [sdd] Very big device. Trying to use READ CAPACITY(16). sd 6:0:0:0: [sdd] 5860533165 512-byte logical blocks: (3.00 TB/2.72 TiB) sd 6:0:0:0: [sdd] Write Protect is off sd 6:0:0:0: [sdd] Mode Sense: 00 06 00 00 sd 6:0:0:0: [sdd] Assuming drive cache: write through sd 6:0:0:0: [sdd] Very big device. Trying to use READ CAPACITY(16). sd 6:0:0:0: [sdd] Assuming drive cache: write through sdd: sdd1 sd 6:0:0:0: [sdd] Very big device. Trying to use READ CAPACITY(16). sd 6:0:0:0: [sdd] Assuming drive cache: write through sd 6:0:0:0: [sdd] Attached SCSI disk Tyring to use cfdisk / fdisk / gdisk or even fdisk -l results in the program hanging and dmesg reports: usb 2-2: reset high speed USB device number 3 using ehci_hcd usb 2-2: reset high speed USB device number 3 using ehci_hcd usb 2-2: reset high speed USB device number 3 using ehci_hcd I have the same 2 drives physically installed in the computer via SATA Any Ideas?

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  • How long does badblocks take on a 1TB drive?

    - by Steven Don
    I'm running badblocks (or rather "e2fsck -c") on a 1TB drive and if the progress indicator is any indication (no pun intended), it's going to take almost forever to complete. Right now it says 0.01% done, 30:20 elapsed which would mean the thing would take 17 weeks or so to complete, which seems rather excessive in my book. Is that a normal amount of time for such a check to take or it simply that my suspicions are correct in that the drive is failing, thus causing the check to take only slightly shorter than eternity? I found this question here, but that pertains to the amount of passes done.

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  • Limiting and redirect port access with useragent

    - by linuxcore
    I'm trying to write iptables string match rule To block http://domain.com:8888 and https://domain.com:8888 when it matches the supplied string in the rule. And another rule to redirect the ports also from 8888 to 7777 I tried following rules but unfortunately didn't work iptables -A INPUT -p tcp -s 0.0.0.0/0 -m string --string linuxcore --algo bm --sport 8888 -j DROP iptables -t raw -A PREROUTING -m string --algo bm --string linuxcore -p tcp -i eth0 --dport 8888 -j DROP iptables -t nat -A PREROUTING -p tcp --dport 8888 -m string --algo bm --string "linuxcore" -j REDIRECT --to-port 7777 iptables -A INPUT -t nat -p tcp --dport 8888 -m string --algo bm --string "linuxcore" -j DROP I want to do this from iptables not the webserver because the server may not have a webserver and those ports are working on internal proxy or something like ..etc

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  • `rsync` NEVER uses its 'famous' delta-transfer!

    - by o_O Tync
    I have a big iso image which is currently being downloaded by a torrent client with space-reservation turned on: that means, file size is not changing while some chunks in in (4 Mib) are constantly changing because of a download. At 90% download I do the initial rsync to save time later: $ rsync -Ph DVD.iso /some/target/ sending incremental file list DVD.iso 2.60G 100% 40.23MB/s 0:01:01 (xfer#1, to-check=0/1) sent 2.60G bytes received 73 bytes 34.59M bytes/sec total size is 2.60G speedup is 1.00 Then, when the file's fully downloaded, I rsync again: total size is 2.60G speedup is 1.00 Speedup=1 says delta-transfer was not used, although 90% of the file has not changed. Why?!

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  • lamp server permissions on development server

    - by user101289
    I run a LAMP server on a ubuntu laptop I use only for development. I am not greatly concerned with security, since the server is never accessible outside the local network, and it's turned off when I'm not using it. My question is what is the simplest and 'best' way to set permissions/users/groups so that when my myself user creates, edits or writes files in the webroot, I won't need to go through and CHMOD / CHOWN everything back to the www-data user? Should I add myself to the www-data group? Or chown the webroot to www-data:myself? Or is there a best practice for this situation so I don't have to keep re-setting the ownership of these files? Thanks

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  • Why does my Mac address reset after reconnecting?

    - by Mr.Student
    I have ubuntu 12. I'm changing my mac address with ifconfig wlan0 hw ether xx:xx:xx:xx:xx:xx which works. However when I restart my connection my computer resets my mac to my original mac address. I'm guessing that this happens because something calls... ifconfig wlan0 down ... do something before connecting ifconfig wlan0 up ... connect to designated access point I want my mac address to however be the same no matter how many times I disconnect and reconnect, whether to another network or the same one. Also it would be nice to turn off the auto-connect feature for my network-manager with out having to edit each individual connection. Lastly I would like to know how to connect to a wifi network through the terminal and not via gui network manager ubuntu provides.

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  • Apache - The name

    - by Joshua Enfield
    I am working on a migration to a newer virtualized server. The old one has Apache 2.2.4 according to the old servers phpinfo(). The new one with the most up to date has 2.2.3. How can this be assuming no trickery is involved? The old one is years old. A lot of the guides I reference use apache2 in folders names and many of the conventions. The newest version of things, as I understand it is called httpd. Did apache change the name from what it originally was? (i.e. break the web server component into its own project called httpd, I realize the original daemon was probably still called httpd)

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  • How do you persist installed software & configurations on an Amazon EC2 instance?

    - by Richard
    I've gotten a base Debian AMI up and running and now I need to know the best way to maintain it. I've ran the updates (aptitude update/upgrade) and installed/configured my software (Apache, Ruby, etc.) but if I reboot the instance or start a new one I'll have to do all this work over again. How do you persist these types of things over a reboot? Do you build a new AMI every time you adjust some tiny piece of the system? Or is there some way to feed it a script on startup that configures it in "real-time"? I know I could go all the way with a Reductive Labs Puppet style setup but that's a bit too much for my needs right now (1-2 servers). Any best practices on this? Update: I found a bit of information on using User-Data to run scripts at instance boot time.

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  • NVidia TwinView - slow rendering on dual desktop

    - by lisak
    Hey, does anybody have experience with it ? I've set it up 4 times on 4 different machines. And there was always problems with slow rendering ( for instance : scrolling pages in browser is not fluent). But there always was something that finally made it work perfectly... I remember that one time this option helped, but not now Option "RenderAccel" "1" Nvidia geforce 8400GS or Zotac geforce 9500GT Monitors connected via dvi and hdmi connectors proper nvidia driver installed Section "ServerLayout" Identifier "X.org Configured" Screen 0 "Screen0" 0 0 InputDevice "Mouse0" "CorePointer" InputDevice "Keyboard0" "CoreKeyboard" Option "Xinerama" "0" EndSection Section "Files" ModulePath "/usr/lib64/xorg/modules" FontPath "/usr/share/fonts/local" FontPath "/usr/share/fonts/TTF" FontPath "/usr/share/fonts/OTF" FontPath "/usr/share/fonts/Type1" FontPath "/usr/share/fonts/misc" FontPath "/usr/share/fonts/CID" FontPath "/usr/share/fonts/75dpi/:unscaled" FontPath "/usr/share/fonts/100dpi/:unscaled" FontPath "/usr/share/fonts/75dpi" FontPath "/usr/share/fonts/100dpi" FontPath "/usr/share/fonts/cyrillic" EndSection Section "Module" Load "dri2" Load "glx" Load "extmod" Load "record" Load "dbe" EndSection Section "InputDevice" Identifier "Keyboard0" Driver "kbd" EndSection Section "InputDevice" Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/input/mice" Option "ZAxisMapping" "4 5 6 7" EndSection Section "Monitor" Identifier "Monitor0" VendorName "Unknown" ModelName "Acer AL1715" HorizSync 30.0 - 83.0 VertRefresh 50.0 - 75.0 EndSection Section "Device" Identifier "Nvidia" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "MSI big bang-fuzion" EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce 8400 GS" EndSection Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "RenderAccel" "1" Option "AllowGLXWithComposite" "1" Option "TwinView" "1" Option "TwinViewXineramaInfoOrder" "DFP-1" Option "metamodes" "CRT: 1280x1024 +1920+0, DFP: 1920x1080 +0+0" SubSection "Display" Depth 24 EndSubSection EndSection

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  • Is it possible to open server ports on TUN devices?

    - by JosephH
    If I make a VPN connection to a server (say myvpn.com; assume this server is not behind any router/firewall) via a TUN device and open a port (say 5555), will someone else be able to connect to me via myvpn.com:5555? If not, is there a tunneling software that does exactly this in a transparent manner? i.e. run any TCP/UDP-based server instance behind a router without NAT using another remote server.

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  • How can I upgrade Ubuntu from 9.10 to 10.04 on a netbook with a 4GB root partition?

    - by Blorgbeard
    I have an Asus EeePC 901, running Ubuntu 9.10. I'd like to upgrade it to 10.04. I don't want to reinstall, since I have a bunch of scripts and programs all set up. However, when I attempt to upgrade using sudo apt-get dist-upgrade, I get an error asking me to free up another ~600MB on /. My / is mounted on sda0, which is a 4GB SSD. I do not have 600MB worth of deletable stuff on /. I've emptied my trash, and done apt-get autoremove and apt-get clean. I do have plenty of space in /home, mounted on sda1 (a 16GB SSD). Is there some way I can tell apt-get to use a different download/temp directory?

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  • Remote file copy util (like rsync) but that will take account of data already copied (in this sessio

    - by Rory McCann
    Let's say I have a directory with 2 files, both are identical and quite large (e.g. 2GB ea.) I want to rsync that directory to a remote host. As I understand it (and I could be wrong), rsync calculates checksums of files. Surely if it sees 2 files with the same checksum it can just copy the first file, then do a local copy on the remote host for the 2nd file? That would make it faster, no? On a similar note, doesn't rsync hash all the remote files before copying? If it saw a different file with the same hash as a file that was to transfered, it could do a local copy on the remote host. Does rsync support this sort of thing? Is there some way to turn it on? Is there a tool similar to rsync that will do this sort of 'hash based' local copies?

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  • Processes spawned by taskset not respecting environment variables

    - by jonesy16
    I've run into an issue where an intel compiler generated program that I'm running with taskset has been putting its temporary files into the working directory instead of /tmp (defined by environment variable TMPDIR). If run by itself, it works correctly. If run with taskset (e.g. taskset -c 0 <program> Then it seems to completely ignore the TMPDIR environment variable. I then verified this by writing a quick bash script as follows: contents of test.sh: #!/bin/bash echo $TMPDIR When run by itself: $ export TMPDIR=/tmp $ test.sh /tmp When run through taskset: $ export TMPDIR=/tmp $ taskset -c 1 test.sh "" Another test. If I export the TMPDIR variable inside of my script and then use taskset to spawn a new process, it doesn't know about that variable: #!/bin/bash export TMPDIR=/tmp taskset -c 1 sh -c export When run, the list of exported variables does not include TMPDIR. It works correctly with any other exported environment variable. If i diff the output of: export and taskset -c 1 bash -c export Then I see that there are 4 changes. The taskset spawned export doesn't have LD_LIBRARY_PATH, NLSPATH (intel compiler variable), SHLVL is 3 instead of 1, and TMPDIR is missing. Can anyone tell me why?

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  • All invalid hosts gets resolved to "com.org"

    - by Vi
    vi@vi-server:~$ nslookup nonexistent.itransition.com Server: 8.8.8.8 Address: 8.8.8.8#53 ** server can't find nonexistent.itransition.com: NXDOMAIN vi@vi-server:~$ cat /etc/resolv.conf nameserver 8.8.8.8 It does not exist. The same result from dig nonexistent.itransition.com. vi@vi-server:~$ ping nonexistent.itransition.com PING nonexistent.itransition.com.org (216.234.246.153) 56(84) bytes of data. 64 bytes from 99.f6.ead8.static.theplanet.com (216.234.246.153): icmp_seq=1 ttl=46 time=128 ms 64 bytes from 99.f6.ead8.static.theplanet.com (216.234.246.153): icmp_seq=2 ttl=46 time=128 ms It catches all invalid hostnames? Why? How to prevent?

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  • xinet vs iptables for port forwarding performance

    - by jamie.mccrindle
    I have a requirement to run a Java based web server on port 80. The options are: Web proxy (apache, nginx etc.) xinet iptables setuid The baseline would be running the app using setuid but I'd prefer not to for security reasons. Apache is too slow and nginx doesn't support keep-alives so new connections are made for every proxied request. xinet is easy to set up but creates a new process for every request which I've seen cause problems in a high performance environment. The last option is port forwarding with iptables but I have no experience of how fast it is. Of course, the ideal solution would be to do this on a dedicated hardware firewall / load balancer but that's not an option at present.

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