General :: Rpm -qa Doesn't Return A Result
Jul 3, 2010
I have an Ubuntu Linux on a VMWare running and I've installed RPM Package Manager. However when I try to query all packages using the rpm -qa command, I don't get any results returned.
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Dec 17, 2010
I want to search files (basically .cc files) in /xx folder and subfolders. Those files (*.cc files) must contain #include "header.h" AND x() function. Clearly, I wanna list of *.cc files that have 'header.h' & 'x()'. They must have two strings.
I tried several ways, and got only files with header.h OR x(). Some examples given in Internet doesn't give any result in my system. I am using Fedora 8.0 in my PC and I have grep 2.5.1 version.
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Feb 14, 2010
I have a dumb question but the google can't seem to answer it. When (if?) my host locks up (RHEL 5.4) I generally don't get anything in /var/crash . kdump is configured correctly and works (if tested using ` echo "c" > /proc/sysrq-trigger` as per Red Hat's KBase article) but in the real world, when the system locks up nothing ever ends up there.
So, on to the dump ( ) question - I have to crash it using Ctrl + SysRq in order to get anything out of this, right. If the box is comatose and doesn't respond at all to the point of being power cycled, it's all gone isn't it? Volatile memory being what it is and all; or is there some sort of magic / voodoo in place that makes it survive the reboot. And no, my Dell PowerEdge 1950 doesn't have battery backed RAM, so i'm quite sure that unless i can kill it through sysrq ...
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Sep 25, 2010
I try to fetch links from a URL using HTML::LinkExtor, but it always return 0 links even if the status code is 200 OK. I am running the following code in Ubuntu 9.04, just curious if the module is too old and its ways of HTTP request is disabled by some platforms.
Code:
#!/usr/bin/perl
use HTML::LinkExtor;
[code]...
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Oct 21, 2010
#!/bin/shLOOK_FOR="NTLMAuthenticationFilter"for i in `find ./ -name "*jar"`doecho "Looking in $i ..."grepjar -e $LOOK_FOR $idoneI wrote the script above, and try to find if there any file name LOOK_FOR exist in those jar,my quest is: grepjar -e $LOOK_FOR $ihere how can I check if there are any successful result , and output them ?
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Nov 10, 2010
Every time I need to find a file and then open it, I have to use :
find ./ -name **.properties. , then copy the result, and then vi "paste the result here" .
If I need to use a mouse, it can be a little trouble. So is there any better way to do this?
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Jul 14, 2011
I have used cp -rl to copy a folder. When measuring the size of the source and of the result of the copy du -sl returns slightly different sizes, even though diff confirms that their content are identical.Both folders reside on the same hard drive, no modifications to any of them have been done between the copy and the measure. I found nothing in the documentation of du and cp which could explain the difference.
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Apr 19, 2011
I want to store the result of wc -l as a variable so I can use it later in my script...so far unsuccessfully.
I have tried this:
set `echo awk '{ print $1, $6}' | wc -l` | echo $1
but it is far from working.
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Jul 20, 2011
List of 77 lines with the names of movies. For ease, let's say it's in a text file. What I want is a command line argument I can pass that'll read each line and pick one of those 77 lines at random, except I can't figure out how to do this. Is there a program I can just pipe the output of 'cat listofmovies.txt' to?
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Apr 15, 2011
the command acpi gives me the percentage of battery that my laptop has.I would like to print the result of acpi in the hardstatus line of "screen".
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May 25, 2011
I am connecting to MySQL DataBase using shellscript and writing a select statement like select attachmentid from attachments where pageid=10175 I want to store the output of the select statement into a shellvariable or a file. How can i do it using shellscript.
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Jul 1, 2011
I am frustrated by running a script on the Fedora 14 computer as a cron job. I paste the code:
Code:
#!/bin/bash
#a backup script to copy data from sda to sdc
ROOTVOL=`blkid -U ea210a08-6212-4dc8-be1c-23fce3b965bc`
[code]....
So when I run this as root, for example:
Code:
# /root/myscript
the result is what I expect:
Code:
Jul 1 13:41:16 svn root: ADMIN: Executing backup-svn
Jul 1 13:41:16 svn root: using blkid ea210a08-6212-4dc8-be1c-23fce3b965bc as /dev/mapper/vg_svn_backup-lv_root
[code]....
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Oct 26, 2010
I have a CSV file with 8 columns. I want to check the 5th column, which will contain a single capitalised letter. If that letter is say "B" I would then like to replace the 2nd column in the csv with an incremental number starting at 0 (basically a count) with a prefix of B (B0000001) Sample row would be:
Code:
C, 0109390,sfs,sfsf,B,blah,blah
Amended row would be:
Code:
C, B000001,sfs,sfsf,B,blah,blah
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Feb 5, 2011
If I want to use that result to be saved in a variable, which type would it be in script? For clearing: let variable x and destination path is y/z
in prog.sh:
x=du -hb /y/z
echo $x
Q1: What type of x?
Q2: What option instead of -hb to presedent the size in kib?
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Aug 8, 2011
I am working at a client who has a project where code is a mixture of different source control systems. So a layout might be like this
project/a/.svn
/a/subfolder/.svn
/b/.hg
/c/subproject/.svn
/d/.hg
So I am trying to put together a simple command that when executed from the project folder will run the appropriate hg/svn command in each project i.e:
[Code]...
Since the client has many such projects, Instead I am looking for a solution similar to find -exec where the svn/hg commands are automatically executed on each first level of match (i.e. svn up is run in the project/a folder but not in project/a/subfolder). How can such a command be constructed ?.
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Oct 7, 2010
I am wanting to create the smallest server I can possible. I have a small server I use as a print server and for file sharing. The hard drive is about 80GB. Since I only run cups and samba, I see no reason to take up an addition few GBs with major distros just to run the OS. I know it is possible to get a small distro around 50MB or so. I would even be happy with an OS running around 200MB. what would be the best way to go about doing this? LFS is just too complicated and time consuming for the end result. Would something like Gentoo be better? Anything else that I may not know about?
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Mar 31, 2011
I have the following commande /sbin/fuser -f -u /u/DT01/F010107 1>/tmp/null 2>/tmp/seausr.T0069 when executing as root 'su' this give me all user using the file. but when tried with 'sudo' i am asked with 'user password'. Is ther anyway to simply get the result without having to supply a password and to see all user not only me. (i have the file open also).
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Jan 7, 2010
i've just appeared RHCE exam. i passed RHCT....but got only 36% in rhce part. but i configured all the servers correctly. i wrote shell script of iptables and i successfully run it. i wrote the following scripts....
[Code]...
the result of shell script showed ok when i tested during exam. i didnt know why i failed in rhce..?? is there any problem in the above scripting..?? BTW i checked all the servers and i found ok after rebooting machine.
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Aug 30, 2010
I am trying to write a script to access sqlplus and use the output to replace the result in another file. But I am having some issues with it (This script is just a test script and I am just trying to print the updated value.
#!/bin/bash
I am not able to post the sqlplus connection, but it works.
bb=$a
[code]....
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May 30, 2011
I came across this reult of the type command (hashed) in another post. (see below).
Code:
fraespappp8:/data/apps > type topic_file_publish.sh
topic_file_publish.sh is hashed (/data/apps/pnbgstk/publication/topic_file_publish.sh)
This (result = hashed) is new to me.
I wonder which kernel/distro/shell it is from.
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Apr 18, 2011
I have an xml file that is similar to this.Suppose that this file name is Example.
<PMID>10605436</PMID>
<Year>2000</Year>
<ArticleTitle>Steroids</ArticleTitle>
[code]...
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Aug 30, 2010
I am trying to write a script to access sqlplus and use the output to replace the result in another file. But I am having some issues with it (This script is just a test script and I am just trying to print the updated value.
#!/bin/bash
a=`echo exit|sqlplus -S -L xxx/xxx@xxx @test.sql`
bb=$a
[code].....
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Aug 12, 2009
ok, I pressed alt-ctrl-f1 and it displayed my screen with a gui. I then pressed alt-ctrl-f2 and it displayed a textual desktop. I pressed alt-ctrl-f3 and it displayed the same thing. When I pressed alt-ctrl-f1 to return to my gui, it would not let me return to a gui. I was stuck in a cmd line textual desktop.
How, without restarting, do i return to a gui once I press alt-ctrl-f2??
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Jan 13, 2010
I'm trying to get a return value from the command running within screen. I have tried
Code:
screen "some_command ; echo $? > retval"
but this refuses to write "retval".
[code]....
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Feb 11, 2010
I am writing a script that will give me the network address that a host belongs to, for example if a machine has a ip address of 192.168.1.4 I want the script to give me 192.168.1.0.
I am able to get the ip address echoed using:
Code:
I am having trouble getting the ip address stored as a variable so I can work with it, below is what I have
Code:
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Jul 20, 2010
Alex accidentally deletes his PATH variable.what are some of the problems he may soon encounter and explain the reasons for these problems. How could he easily return PATH to its original value?
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Apr 19, 2011
why does md5sum return a dash at the end:
Code:
$ md5sum
string290350295 -
How can I remove this using the md5sum tags?
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May 15, 2010
I have called an script in cronjob named get_mac.sh as follows:
#!/bin/sh
MAC=`ifconfig eth0 |sed -n 1p|awk '{print $5}'|awk -F : '{print $1$2$3$4$5$6}'`
ARG_FILE="/etc/asterisk/scripts/server.params"
[code]....
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Jul 27, 2010
I am trying to automate yum update of specific package on a remote machine.So far I have this:
#!/bin/bash
# Update my system
if ! yum update w3m
then
failure=1
[Code]...
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Apr 2, 2010
I tried to format my harddisk (160 GB) with the following command
dd if=/dev/zero of=/dev/sda
After some 3 hours, following error came up:
dd: writing to '/dev/sda' : No space left on device
312581809+0 records in
312581808+0 records out
160041885696 bytes (160 GB) copied, 10708.3 s, 14.9 MB/s
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