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• Suggestion: ALLFILES option for RESTORE

  - by Greg Low

  The default action when performing a backup is to append to the backup file yet the default action when restoring a backup is to restore just the first file.I constantly come across customer situations where they are puzzled that they seem to have lost data after they have completed a restore. Invariably, it's just that they haven't restored all the backups contained within a single OS file. This happens most commonly with log backups but also happens when they have not restored the most recent database backup file.It is not trivial to achieve this within simple T-SQL scripts, when the number of backup files within the OS file is unknown. It really should be.I'd like to see a FILES=ALLFILES option on the RESTORE command. For RESTORE DATABASE, it should restore the most recent database backup plus any subsequent log files. For RESTORE LOG (which is the most important missing option), it should just restore all relevant log backups that are contained.If you agree, you know what to do: please vote:  https://connect.microsoft.com/SQLServer/feedback/details/769204/option-to-restore-all-backups-files-within-a-media-setAlternately, how would you write a T-SQL command to restore all log backups within a single OS file where the number of files is unknown? Would love to hear creative solutions because all the ones that I think of are pretty messy and need dynamic SQL. 

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• Table 'mysql.host' doesn't exist

  - by eriktm

  100913 10:21:29 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql /usr/local/mysql/libexec/mysqld: Table 'mysql.plugin' doesn't exist 100913 10:21:29 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it. 100913 10:21:29 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist 100913 10:21:29 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended This is the output from the log-file for mysqld I get when I try to start mysqld with the mysqld_safe command. I tried to run mysql_upgrade to correct the first error, but this command seems to require the server to be started, which is my original problem. Next, it says that the table mysql.host does not exist. I was unable to figure out what this is caused by.

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• How to automatically mount a folder and change ownership from root in virtualbox

  - by Fiztban

  It is my first time using virtualbox and ubuntu (14.04), I am on a host Windows 7 OS. I am trying to mount a shared folder that has files I need to access both in the virtualbox and on the windows OS. I have successfully mounted them using the vboxsf from the Guest Additions installed. To mount I used the command sudo mount -t vboxsf <dir name in vbox> <directory in linux for example I used sudo mount -t vboxsf Test /home/user/Test I found several ways of mounting the directories automatically upon startup using for example the /etc/rc.local method (here) where you modify said file appending the command to it (without sudo). Or by using the fstab method (here). I prefer the rc.local method personally. Once mounted it has permissions dr-xr-xr-x however once mounted the directory is of root ownership and chown user /home/user/Test has no effect. This means I cannot make or change files in it as a normal user. In the VirtualBox the directory to be shared is not set as read-only. Is there a way to automatically mount the shared folder and assign ownership to my non root user?

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• how to google a symbol keyword like "$?"

  - by ZhengZhiren

  i saw a trick in a book: in a linux shell, we can use &? to get the return value of a command. For example,we run a command,if it exit normally, the return value is 0. And then we type $?,we will get 0 in the screen. i want to google this kind of usage, so i have to type these two symbol $? in the search blank.But the search engine just return nothing to me... i have looked at the google help page, but still can't find a solution. so my question is: how can i search with this kind of keyword. or if you can give me some advise of the usage of $? or sort of thing, that will be also appreciated.

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• snmptrap and snmptt - authcommunity not found

  - by sabs6488

  I am trying to configure snmptt to translate the snmp traps received and handle them as passive checks in icinga monitoring server as described here . after doing the changes to the snmptrapd.conf . I am trying to restart the service and I see authcommunity : command not found, traphandle : command not found . my understanding is the authcommunity and traphandle are just configuration directives which will tell snmptrapd about the community string to use and the traphandle script to be called. It would be helpful if someone can help me understand better. Thanks, sabs

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• Cron job failing to backing up a Postgres database

  - by user705142

  I'm unsure what's going on here: I've got a backup script which runs fine under root. It produces a 300kb database dump in the proper directory. When running it as a cron job with exactly the same command however, an empty gzip file appears with nothing in it. The cron log shows no error, just that the command has been run. This is the script: #! /bin/bash DIR="/opt/backup" YMD=$(date "+%Y-%m-%d") su -c "pg_dump -U postgres mydatabasename | gzip -6 > "$DIR/database_backup.$YMD.gz" " postgres # delete backup files older than 60 days OLD=$(find $DIR -type d -mtime +60) if [ -n "$OLD" ] ; then echo deleting old backup files: $OLD echo $OLD | xargs rm -rfv fi And the cron job: 01 10 * * * root sh /opt/daily_backup_script.sh It produces a database_backup file, just an empty one. Anyone know what's going on here?

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• Ftp freezes despite connection seems allright

  - by Alfred M.

  I am trying to connect to a an ftp through command line using ftp ftpperso.free.fr I am then prompted for username and password. I get this message 230 User username logged in. Remote system type is UNIX. Using binary mode to transfer files. and status confirm that I am connected to the server. However when I then try any command, for instance ls the console freezes and nothing happens. Do you have any idea of what is going on?

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• is there a cheatsheet for linux commands to save your system?

  - by Asaf

  I've recently lost my window options, had to somehow manipulate my way to Xchat and ask some people how do I get it back (it was metacity --replace, and after I decided to stop the command and run it in background the X was completely useless so I had to do killall -u user). And that was after the internet connection stopped working for some reason (might've been the ISP) ..The thing is, after using linux a long time, I still get the feeling that on dire situations, I don't know the good tricks (stuff like metacity --replace) I feel like a really need like a "rescue" cheatsheet for things like "how to save the X no matter what without pressing reset" and "how to reset the system to "normal state"" "how to connect to the internet through the command line" "how to monitor what the X is doing" (using ubuntu linux 10.04 btw)

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• Getting console2 to work nicely with UAC

  - by Merlyn Morgan-Graham

  I would like to get console2 to work nicely with UAC Particular problems I would like to tackle: If I start non-elevated, have a way to elevate while running. It'd be especially nice if I could elevate individual tabs I would like to get different coloring for admin/non-admin, similar to: this link. Basically, if I can get the console to execute a command on startup (similar to the HKLM\Software\Microsoft\Command Processor\AutoRun registry value), that's all I need How do I get this working? Would I have to modify source code to get this to work, or can I use different tab settings/do hacks w/ shell executables? I am using Windows 7, although I would imagine any working solution would also work on Vista.

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• Vim - select text highlighted by search?

  - by GorillaSandwich

  In vim, I often perform searches to hop to a word or phrase instead of navigating there with h/j/k/l. Then I hit n to hop between occurrences. Say I've got this text: Time flies like an arrow; fruit flies like a banana. - Groucho Marx I type /an arrow and hit enter. That phrase is highlighted, and I jump to it. Now I want to visually select that text, maybe to change it or delete it. (Yes, I'm aware of the :s substitution command.) Since my cursor is at the letter "a" at the beginning of "an arrow," I can hit v, then press e a couple of times to highlight the entire phrase. But I have a feeling there's a shorter and more semantic way. After all, I've already specified the text I'm interested in. How might I compose a command to say "visually select the current search selection?"

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• How to change the download save directory in ktorrent from a remote host

  - by Garethj94

  So I have ktorrent running on a server and I don't have the ability to see the X11 display for the client, and I need to change my download directory since I like to keep everything very organized. So I need a way to change the download directory for the program as a whole, not like decide where to put each and every torrent that I download. This can't be done through the webui preferences so I'm guessing that I'll have to do it through ssh somehow but from what I've read there really isn't a command to use. Also the way that I have the application run is on startup my server runs the command ktorrent, so it will already be running when I want to change the download location so I assume that I will have to restart the program as well. If anyone knows how to do this it would be much appreciated, and I can't think that I'm the only person to want this feature.

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• setup vim so that it searches the python path

  - by Dave

  I'm using vim as my primary editor with python files; I'd like to be able to easily open python files. As an example: I'm looking at a particular module A.py, in it I see the line import funkyModule, I want to edit that module so I just type in the command :pyed funkyModule and the pyed vim-command automatically finds the file funkyModule.py (or funkyModule/__init__.py) where ever it occurs on the python path. This capability is modeled on the capabilities if the ipython shell, where In [#]: edit funkyModule does what I've just described.

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• How can I see if my server uses DDRII or DDRIII RAM?

  - by Temnovit

  I have a very newbie question. My server is running out of RAM and it is time to add some. The is located far away, and I need to buy some RAM and drive to install it. How can I determine, whether I need to buy DDRII or DDRIII, having only command line access via SSH? Is there some command that will print witch kind of RAM is supported by the server or I need to go and check the server physically? UPDATE Sorry, forgot to mention: I am using Ubuntu Server 9.04

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• Help updating cron entry using regular expressions

  - by Uday

  hi I am trying to update a cron entry NOT by using crontab -e but by shell commands. For example the cron entry is like this: 10 * * * * /home/localuser/foo.sh -b 1 -h 4 > foo_output.sh 2>&1 No i need edit the command line parameters part ONLY i.e -b 1 -h 4 to something else which will be coming in from the user. First thing would be to write the crontab to a tmp file and then manipulate that temp file. Now, is there an easy way to edit that line using SED or something? The crude way wud be to delete that entire line, write a new line with the entire expression and then load that into the cron. I am not very good with regular expressions. My system supports sed -i so was thinking this could be done in a single line command. Thanks in advance

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• ffmpeg error while segmenting

  - by Tommy Ng

  I'm using ffmpeg and segmenter on Ubuntu 10.04 to create the transport stream from flv/h264 video files and then segment the ts segments for ipad streaming. Some ts files show an error with segmenter - Output #0, mpegts, to '29': Stream #0.0: Video: 0x0000, yuv420p, 480x360, q=2-31, 90k tbn, 25 tbc Stream #0.1: Audio: 0x0000, 0 channels, s16 [mpegts @ 0x11f4ac0]sample rate not set Could not write mpegts header to first output file my ffmpeg command for creating the ts file - ffmpeg -i 1.flv -f mpegts -acodec libfaac -ar 48000 -ab 64k -s 480x360 -vcodec libx264 -b 192k -flags +loop -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -subq 5 -trellis 1 -refs 1 -coder 0 -me_range 16 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -bt 200k -maxrate 192k -bufsize 192k -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 30 -aspect 480:360 -g 30 -async 2 -y 1.ts my segmenter command - segmenter 1.ts 10 1 1.m3u8 path/to/streams/

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• ImageMagick convert to png32, can't change background at all

  - by Doug

  So I'm stumped. I've been wrestling with this simple command to turn an SVG file into a transparent SVG to no avail. Here's my command convert svg:/home/media/svgTest.svg -quality 100 -background none -size 3300x3300 png32:/home/media/pngTest.png The PNG comes out fine, but the background is white. Upon further investigation - the PNG's background is white no matter what I set the -background option to. I've tried black, tomato4, and even various hex colors. Nothing - just white. My SVG has no background fill layer or anything like that, it's just a couple of blue path layers. Also, I am running ImageMagick v 6.6.9-7 on Ubuntu 12.04 Lts What am I doing wrong? Thanks

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• Cannot usermod -L in LightDM scripts

  - by user95723

  I'm running Xubuntu 12.04 and use the LightDM. I want to restrict access to the machine as a kind of parental control. This is how it should work I hook in a script that executes just before the greeter comes up. Within that script some awk processing will read an entry in a config file and will trigger a usermod -L or usermod -U depending on whether the user is allowed to login. While user is logged, a cron job will count down the entry in the config and forces a xfce4-session-logout if time is up. A cron job running on a server will upload the "credits" on a daily base. How is this idea? That's theory, now for the problems It appears for some unknown reason, the usermod command is not executed, neither as part of a display-setup-script nor within the greeter-setup-script. I wrote a small sandbox script usermod -L johndoe 2error.txt touch /etc/blabla 2error.txt The script is executing, cause the blabla file is existing. That means that the script must have been executed with root privileges. error.txt is empty but the usermod command has just no effect. Is this a bug or a feature. What's wrong? Best regards and thank you Oli

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• Using TrueCrypt (software encryption) with an SSD

  - by Shackrock

  I use full drive encryption (FDE) w/ TrueCrypt on my laptop. I have a 2nd gen I7 with AES instruction support, so honestly I can't even notice a speed change on the system with it on. My question, is for those who know about SSD's a lot. I previously (early 2011) read articles about how software encryption will negate the speed benefits that an SSD provides - because of the need for the SSD to send a delete command, then a write command, for every encrypted write - instead of just writing over data like a regular HDD would (or something like this...honestly I can't remember...ha!). Anyway, any improvements in this field? Is it pointless for me to grab an SSD if I'm using FDE? Thanks all.

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• Vlan Tagging at Access Port in Switch

  - by singh

  I'm Confused from the fact that Vlan tagging is done at access port and trunk port always gets tagged packets (until its case of native vlan).But I still believe in other fact which says tagging happen only when a frame hit the trunk port which means trunk port gets untagged frame and tagging is not possible at access port. Would like to know where actually this tagging happens ? and also which command we can use to encapsulate 802.1q protocol to access port ? The way we do at trunk port is switchport trunk encapsulation dot1q Is the above command applicable for access mode also?

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• EC2 Amazon Linux AMI MySQL CPU @ 62% When Idle?

  - by Jeff

  I am running MySQL on an Amazon Linux AMI. There is nothing connected to it. There are no connections and no other applications running that use MySQL. It is completely idle, but yet, top is reporting that mysql is using 62% of the CPU? Why is this happening and how do I fix it? Cpu(s): 0.2%us, 0.2%sy, 0.0%ni, 97.8%id, 0.0%wa, 0.0%hi, 0.0%si, 1.7%st Mem: 1738504k total, 390708k used, 1347796k free, 56888k buffers Swap: 917500k total, 0k used, 917500k free, 229804k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2959 mysql 20 0 466m 39m 5244 S 62.2 2.3 4:00.67 mysqld 1 root 20 0 19252 1504 1212 S 0.0 0.1 0:00.20 init 2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd There are no connections... mysql> show processlist; +----+------+-----------+------+---------+------+-------+------------------+ | Id | User | Host | db | Command | Time | State | Info | +----+------+-----------+------+---------+------+-------+------------------+ | 5 | root | localhost | NULL | Query | 0 | NULL | show processlist | +----+------+-----------+------+---------+------+-------+------------------+

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• How do I create the "Gnome-Desktop-Item-Edit" program's launch icon with root privileges and more?

  - by GanZ

  I personally dont prefer running commands in terminal to achieve a task and prefer apps to execute the job. Creating launcher for apps is one such command where I prefer the gnome-desktop-item-edit application for creating launchers. If the gnome package is installed, just searching "create launcher" opens the app. But, it doesnt serve any purpose, because for starters the application cannot create launchers for various apps without root permission and the location where the apps have to be created. Usually the launcher apps with root permission can be created at /usr/share/applications and without root permission at /.local/share/applications. I dont prefer the latter location as it is vulnerable to deletion. Hence, in order to create the launchers through gnome with root, everytime I am forced to open this through terminal using the below command! $ sudo gnome-desktop-item-edit ~/.local/share/applications --create-new I dont want to open terminal everytime I want to create an application launcher on unity! I am able to lock the "Create Launcher" App in the Launcher, but not with root privileges So I want to be able to create the "Create Launcher" app shortcut on unity with default root privileges and for the app to create the launchers at usr/share/applications by default! Please help! P.S. I dont have enough rep points to add screenshots to help with the question!

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• How to enable logging for Google Chrome in Ubuntu 12.04?

  - by skytreader

  I'm trying to capture the logs for a certain bug I'm having with Google Chrome. However, I can't find/enable logs for GC. According to this Chromium project page, I just need to add the flags --enable-logging --v=1 and a chrome_debug.log file will appear in my user data directory. However, after running GC (and closing through the 'X' title bar button) there is no chrome_debug.log file in the specified directory. I even tried running as root as it may have something to do with write permissions but GC refuses to start as root. Another thing, GC also prints messages when invoked from command line. I tried capturing this and redirecting them to a file via $ google-chrome > today.log but the messages are still printed in the command line and the file I specify gets created but remains empty. Note that I can't just copy-paste the messages printed on terminal after my bug occurs as the bug freezes up my whole system that, when it occurs, my only option is to turn off my computer straight via the power button. I've seen a few similar bugs already posted but I find that they don't exactly describe my situation so I'd really like to get some logs for this. So how do I enable logging or, at least, get those terminal messages in a file?

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• Run preseed commands as specific user / switching users

  - by pduersteler

  Beside the usual setup where I create a normal user foo, I want to run a few d-i preseed/late_command commands as that foo user. My initial thought was to simply call those commands with sudo, e.g: d-i preseed/late_command in-target echo "<pwd>" | sudo -Si <command>. This works for some sort of commands. However the problem is that some of the commands load up shell scripts which require to not be run with sudo. Issuing a su -c "<command>" would be an alternative, but su does not offer the possibility to read the password from stdin. Is it safe to jump around between the users using su (And if yes, how do I provide the stdin? and does it work or just result in a su: must be run from a terminal) or would this cause issues?

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• Is there a PROPRIETARY driver (NVIDIA or ATI) that actually works with 12.10?

  - by DS13

  NOTE: I see many similar topics on this, but I've tried all their suggestions, and nothing has worked. THE MAIN DIFFERENCE SEEMS TO BE: I always get a black screen with a blinking cursor, while others seem to get through the boot-up and see distorted graphics or just their wallpaper. ISSUE: I do a clean install of Ubuntu 12.10. Boots fine with the “nouveau” graphics driver – graphics (even just menus) are very slow, choppy, and distorted. The three other driver options in Ubuntu (official NVIDIA drivers), all result in a variation of the black screen on boot up. There will be NO access to a command line/GUI in anyway what-so-ever (tried every option recommended out there, but the system is unusable at this stage). I can only reinstall, and try different drivers…and I only ever get one shot at it. QUESTIONS: -Does anyone know of a PROPRIETARY driver that will actually work on 12.10 with a NVIDIA or ATI card? -Should I just buy a newer graphics card to put in as a replacement? MORE INFO: This is my second computer, and I’m just trying to get a working install of Ubuntu on it. I don’t want to put much money into it, as I have seen Ubuntu run great on much older/less capable machines. I’ve got a decent'ish Core2Duo Intel processor (2.13Ghz), 2GB of RAM, 320GB hard drive, 32-bit architecture, and there is no other O/S installed. It appears as if the graphics card (NVIDIA Geforce 7350 LE) is holding me back. TRIED SO FAR: -all drivers available in Ubuntu *all fail -manual install of some different NVIDIA drivers *all fail -also tried installing the generic kernel, Nvidia driver doesn't work in 12.10 *no difference -tried installing 12.04 *same results -every method suggested to at least get a command line after switching to a NVIDIA driver *all fail -UPDATE- Re-tried everything above with a new NVIDIA Geforce 210...same results for everything. -UPDATE #2- Re-tried everything above with a new AMD Radeon HD 6450...installed the proprietary driver from Ubuntu's "Software Sources" menu...EVERYTHING NOW WORKS. See "answer" below for summary.

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• Cannot access SVN repository from another host within the LAN

  - by akaii

  I'm trying to connect to a repository I've set up on our server from another host on the same network, but the connection is failing. checkout command: svn checkout svn://192.168.11.192/ error: Can't connect to host '192.168.11.192' : Connection refused I tried probing port 3690 with telnet, and I can't seem to connect that way either. I thought the port might be blocked, so I added an entry for port 3690 in sysconfig/iptables, but it doesn't seem to have had any effect at all. I'm sure svnserve is running, because I can checkout the repository on server using the same command above. What can I possibly try next?

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