There are times you want to enter a single-line command to unzip all the files in a directory. If the current directory is:
/home/timb/download/files
the command would be:
for i in `ls ~/download/files/`; do tar -xzvf ~/download/files/$i; done
This would unzip every .tar.gz file in that directory into your current directory.
There are times when you need to route all your web traffic (http) and file transfer (ftp) traffic through a proxy. This may be because you're in a business environment and all traffic is "inspected" prior to going to the destination site or it may be at home where you've installed proxy software to monitor the kids or block them from some web sites / ftp sites.
Setting up the information in Linux to use the proxy is as simple as adding the following lines in one of several files.
export HTTP_PROXY="http://192.168.0.2:8118/"
export FTP_PROXY="http://192.168.0.2:8118/"
export use_proxy=on
This could be in ~/.bashrc (or other shell configuration file) or in /etc/profile. Both will accomplish the same thing. The advantage of using it in /etc/profile is that it applies to everyone using the computer. If it's in just your personal .bashrc file it only applies to your login.
Enjoy
I had to install my compiler and make with the commands:
# apt-get install gcc
# apt-get install make
I had to install a current kernel with the command:
# apt-get install linux-headers-$(uname -r)
Then I ran into additional problems because the linux source directory was not available. This was solvd by listing the directory /usr/src/ to determine the current version of the source files, and linking to it.
# ls /usr/src drwxr-xr-x 20 root root 4096 2008-07-05 15:09 linux-headers-2.6.24-19 drwxr-xr-x 6 root root 4096 2008-07-05 15:09 linux-headers-2.6.24-19-server # ln -s linux-headers-2.6.24-19-server/ linux
Then the following error occurred:
make[2]: *** [/tmp/vmware-config0/vmmon-only/linux/driver.o] Error 1 make[1]: *** [_module_/tmp/vmware-config0/vmmon-only] Error 2 make[1]: Leaving directory `/usr/src/linux-headers-2.6.24-19-server' make: *** [vmmon.ko] Error 2 make: Leaving directory `/tmp/vmware-config0/vmmon-only' Unable to build the vmmon module. For more information on how to troubleshoot module-related problems, please visit our Web site at "http://www.vmware.com/download/modules/modules.html" and "http://www.vmware.com/support/reference/linux/prebuilt_modules_linux.html". Execution aborted.
This is related to the VMMon modules and has any easy fix by downloading the vmware-any-any module (see the http://www.vmware.com/support/reference/linux/prebuilt_modules_linux.html link for a link to Petr Vandrovec's website). Then you can run the runme.pl script yourself.
This generated the following messages:
VMware 2 or VMware Express detected, building for VMware 2, VMware Express and VMware Workstation 4.0.x. Using 2.6.x kernel build system. make: Entering directory `/tmp/vmware-config1/vmmon-only' make -C /usr/src/linux/include/.. SUBDIRS=$PWD SRCROOT=$PWD/. modules make[1]: Entering directory `/usr/src/linux-headers-2.6.24-19-server' CC [M] /tmp/vmware-config1/vmmon-only/linux/driver.o CC [M] /tmp/vmware-config1/vmmon-only/linux/driverLog.o CC [M] /tmp/vmware-config1/vmmon-only/linux/hostif.o CC [M] /tmp/vmware-config1/vmmon-only/common/comport.o CC [M] /tmp/vmware-config1/vmmon-only/common/cpuid.o CC [M] /tmp/vmware-config1/vmmon-only/common/hash.o CC [M] /tmp/vmware-config1/vmmon-only/common/memtrack.o CC [M] /tmp/vmware-config1/vmmon-only/common/phystrack.o CC [M] /tmp/vmware-config1/vmmon-only/common/task.o gcc: error trying to exec 'cc1plus': execvp: No such file or directory make[2]: *** [/tmp/vmware-config1/vmmon-only/common/task.o] Error 1 make[1]: *** [_module_/tmp/vmware-config1/vmmon-only] Error 2 make[1]: Leaving directory `/usr/src/linux-headers-2.6.24-19-server' make: *** [vmmon.ko] Error 2 make: Leaving directory `/tmp/vmware-config1/vmmon-only' Unable to build the vmmon module. For more information on how to troubleshoot module-related problems, please visit our Web site at "http://www.vmware.com/download/modules/modules.html" and "http://www.vmware.com/support/reference/linux/prebuilt_modules_linux.html". Execution aborted.
This told me I needed to install g++ as well.
# apt-get install g++
I still continued to have trouble, mainly I couldn't connect to the bridged network. Running the following command also helped:
# apt-get install ia32-libs
Then I was able to finally run the install commands:
# cd /home/install/vmware-server-distrib/
# ./vmware-install.pl
And when that errored our, I ran the following commands:
# cd /home/install/vmware-any-any-update115
# ./runme.pl
To solve the following error:
timb@pc018:~$ vmware & [1] 12350 timb@pc018:~$ /usr/lib/vmware/bin/vmware: /usr/lib/vmware/lib/libgcc_s.so.1/libgcc_s.so.1: version `GCC_3.4' not found (required by /usr/lib32/libcairo.so.2) /usr/lib/vmware/bin/vmware: /usr/lib/vmware/lib/libpng12.so.0/libpng12.so.0: no version information available (required by /usr/lib32/libcairo.so.2) /usr/lib/vmware/bin/vmware: /usr/lib/vmware/lib/libgcc_s.so.1/libgcc_s.so.1: version `GCC_4.2.0' not found (required by /usr/lib32/libstdc++.so.6) /usr/lib/vmware/bin/vmware: /usr/lib/vmware/lib/libgcc_s.so.1/libgcc_s.so.1: version `GCC_3.4' not found (required by /usr/lib32/libcairo.so.2) /usr/lib/vmware/bin/vmware: /usr/lib/vmware/lib/libpng12.so.0/libpng12.so.0: no version information available (required by /usr/lib32/libcairo.so.2) /usr/lib/vmware/bin/vmware: /usr/lib/vmware/lib/libgcc_s.so.1/libgcc_s.so.1: version `GCC_4.2.0' not found (required by /usr/lib32/libstdc++.so.6) /usr/lib/vmware/bin/vmware: /usr/lib/vmware/lib/libgcc_s.so.1/libgcc_s.so.1: version `GCC_3.4' not found (required by /usr/lib32/libcairo.so.2) /usr/lib/vmware/bin/vmware: /usr/lib/vmware/lib/libpng12.so.0/libpng12.so.0: no version information available (required by /usr/lib32/libcairo.so.2) /usr/lib/vmware/bin/vmware: /usr/lib/vmware/lib/libgcc_s.so.1/libgcc_s.so.1: version `GCC_4.2.0' not found (required by /usr/lib32/libstdc++.so.6) [1]+ Done vmware
Then I had to install gcc-3.4 and g++-3.4 with the following commands:
# apt-get install gcc-3.4
# apt-get install g++-3.4
And I got VMware to run.
I recently converted my system from SuSE 10.1 to OpenSuSE 10.2. When I upgraded VMware to v5.5.2, I was no longer able to change which ISO file I was using for Knoppix (that's how I discovered it at any rate). Turns out the issue was a little larger than that as something broke the virtual file system (VFS). From the VMware web site ( http://www.vmware.com/community/thread.jspa?messageID=545298) noticed that other people were having the same issue.
The actual error was The Folder could not be displayed - VFS error: Invalid parameters. Further on, a found a reference that fixed it for me. By logging on as root, and executing the following statements:
# cd /usr/lib/vmware/lib
# mv libpng12.so.0 libpng12.so.0.old
# ln -sf /usr/lib/libpng12.so.0
# mv libgcc_s.so.1 libgcc_s.so.1.old
# ln -sf /lib/libgcc_s.so.1
I was able to get VMware working again. This is specifically for VMware Workstation 5.5.2 on OpenSuSE 10.2. This is only documented because some people may find a similar problem in the future with different libraries.
I recently converted my system from SuSE 10.1 to OpenSuSE 10.2. When I upgraded VMware to v5.5.2, I was no longer able to change which ISO file I was using for Knoppix (that's how I discovered it at any rate). Turns out the issue was a little larger than that as something broke the virtual file system (VFS). From the VMware web site ( http://www.vmware.com/community/thread.jspa?messageID=545298) noticed that other people were having the same issue.
The actual error was The Folder could not be displayed - VFS error: Invalid parameters. Further on, a found a reference that fixed it for me. By loggng on as root, and executing the following statements:
cd /usr/lib/vmware/lib
mv libpng12.so.0 libpng12.so.0.old
ln -sf /usr/lib/libpng12.so.0
mv libgcc_s.so.1 libgcc_s.so.1.old
ln -sf /lib/libgcc_s.so.1
I was able to get VMware working again. This is specifically for VMware Workstation 5.5.2 on OpenSuSE 10.2.
Computer System Computer History
Timothy J. Bruce
PC001
PC002
PC003
PC004
PC005
PC006
PC007
PC008
PC009
PC010
PC011
PC012
PC013
PC014
Updates: 14 Jun 2007
PC015
PC016
PC017
PC018
PC019
PC020
PC021
PC022
PC023
PC024
PC025
PC026
This shell script is used to show me how much space a particular directory takes up. The idea came to me while I was looking at filelight at one point because I was wondering hot much space some directories are taking on one of my systems. I could see the space used by a directory (and all it's subdirectories), but I wanted a way to see that space usage from the command line as well. Maybe someone had already written it, but this was my first pass at it back in 2005.
#! /bin/sh echo du $DIR --max-depth=1 -k 2>/dev/null
Then I made some improvments so I could run it against either my current directory or against a path I had permissions to, giving me the current version below:
#! /bin/sh DIR=$1 if [ -z $1 ]; then DIR=. fi echo -n "Displaying size of: " if [ $DIR = "." ]; then echo `pwd` else echo "$DIR" fi echo -e '\n' du $DIR --max-depth=1 -k 2>/dev/null
I'm sure further improvements could be made, but this gives me a quick view of the space used. Sometimes I use this with space.sh | sort -n to sort my directories in numerical order so I can easily see which are the largest subdirectories.
It’s really not tough, but I always seem to forget how to install a package to Freesco. Just use the following command from the freesco command line (remember you must be root to do this)
pkg -i pathname
Pathname would be the location of the package, usually in http: format.
For instance, the installation of the Dinjite’s Utils package for 0.3.x would be:
pkg -i http://dingetje.homeip.net/packages/0.3.x/utils_1.1_dingetje
There are a lot of add-on packages you can add to extend the functionality of FreeSCO. ONe source of additional packages can be found at http://www.freescosoft.com/ which links to a variety of sources. You may also find other packages linked in various forums in the Freesco support forums (http://forums.freesco.org/support).
NOTE: This package (the Dingetje's Utils package) is not listed with the normal packages in the Freescosoft web site. The only reference I found was in the Support Forums (http://forums.freesco.org/support/index.php?showtopic=12984&hl=utils_1.1_dingetje). Feel free to explore for other packages that meet your needs.
Occasionally, I have a need to look up a particular ASCII code when I'm writing writing some software. This is a reference for me, so I can easily find the list of printable ASCII characters.
The list of printable ASCII characters
| 33 | ! | 34 | " | 35 | # | 36 | $ | 37 | % | ||||
| 38 | & | 39 | ' | 40 | ( | 41 | ) | 42 | * | ||||
| 43 | + | 44 | , | 45 | - | 46 | . | 47 | / | ||||
| 48 | 0 | 49 | 1 | 50 | 2 | 51 | 3 | 52 | 4 | ||||
| 53 | 5 | 54 | 6 | 55 | 7 | 56 | 8 | 57 | 9 | ||||
| 58 | : | 59 | ; | 60 | < | 61 | = | 62 | > | ||||
| 63 | ? | 64 | @ | 65 | A | 66 | B | 67 | C | ||||
| 68 | D | 69 | E | 70 | F | 71 | G | 72 | H | ||||
| 73 | I | 74 | J | 75 | K | 76 | L | 77 | M | ||||
| 78 | N | 79 | O | 80 | P | 81 | Q | 82 | R | ||||
| 83 | S | 84 | T | 85 | U | 86 | V | 87 | W | ||||
| 88 | X | 89 | Y | 90 | Z | 91 | [ | 92 | \ | ||||
| 93 | ] | 94 | ^ | 95 | _ | 96 | ` | 97 | a | ||||
| 98 | b | 99 | c | 100 | d | 101 | e | 102 | f | ||||
| 103 | g | 104 | h | 105 | i | 106 | j | 107 | k | ||||
| 108 | l | 109 | m | 110 | n | 111 | o | 112 | p | ||||
| 113 | q | 114 | r | 115 | s | 116 | t | 117 | u | ||||
| 118 | v | 119 | w | 120 | x | 121 | y | 121 | z | ||||
| 123 | { | 124 | | | 125 | } | 126 | ~ | 127 |
There are also some higher order character that show up in ASCII, but those are dependent on the code page that is loaded. One provides a "line art" set of character for drawing lines and double lines to make boxes and other emphasis and other provide a limited set of characters from some foreign languages. If you want more information on these, please search on "code pages" with your favorite search engine.
Sometimes you want to be able to list the active users, and you can use the system stored procedures of sp_who and sp_who2 to do that. However, I've found that it's inconvenient for a couple of reasons.
PRINT 'Building usp_ListUsers - Starting' GO IF NOT ( object_id ( 'usp_ListUsers' ) is NULL ) BEGIN DROP PROCEDURE usp_ListUsers END GO SET QUOTED_IDENTIFIER ON GO SET ANSI_NULLS ON GO SETUSER 'dbo' GO CREATE PROCEDURE usp_ListUsers @astr_database VARCHAR (50) = NULL, @astr_user VARCHAR (50) = NULL AS BEGIN /********************************************************************* NAME: usp_ListUsers DATABASE: master PARAMETERS: astr_Database - (Optional) The database to report on (list users in) astr_User - (Optional) The user to find and report on ASSUMPTIONS: NONE COMMENTS: NONE AUTHOR(S): TJB - Timothy J. Bruce PURPOSE: MODIFICATION HISTORY Init Date Comments TJB 07Mar02 Initially Created *********************************************************************/ /* Declare Variables */ DECLARE @lstr_Database CHAR ( 20 ) DECLARE @lstr_Error1 CHAR ( 50 ) DECLARE @lstr_Error2 CHAR ( 50 ) DECLARE @lstr_user VARCHAR ( 50 ) DECLARE @llng_Count INTEGER DECLARE @llng_DBID INTEGER /* Set up the Environment */ SET NOCOUNT ON /* Begin Processing */ IF @astr_database IS NOT NULL BEGIN IF db_id ( @astr_database ) IS NULL BEGIN -- If there is no associated db_id, it doesn't exist. SELECT @lstr_Error1 = 'The database name you entered (' SELECT @lstr_Error2 = ') is not valid for this server.' SELECT 'Error'=@lstr_Error1 + @astr_database + @lstr_Error2 RETURN ( -1 ) END ELSE BEGIN -- Found the database - lets list all the users in it. --SET 'DB' = @astr_database SELECT spid, 'Status' = CONVERT ( CHAR(10), status ), 'login' = CONVERT ( CHAR (15), loginame), 'NT Account' = CONVERT ( CHAR (12), nt_username), 'Workstation Id' = CONVERT ( CHAR (15), hostname), blk = CONVERT ( CHAR (5), blocked), dbname = CONVERT ( CHAR (20), db_name(dbid) ), 'Program' = CONVERT ( CHAR (10), program_name), 'Command' = CONVERT ( CHAR (20), cmd ) FROM master.dbo.sysprocesses WHERE spid BETWEEN 0 and 32767 AND dbid = db_id ( @astr_database ) ORDER BY loginame, hostname, spid END END ELSE BEGIN IF @astr_user IS NOT NULL BEGIN SELECT @lstr_user = '%'+ @astr_User + '%' SELECT @llng_Count = COUNT(*) FROM master..sysprocesses WHERE UPPER ( nt_username ) LIKE UPPER ( @lstr_user ) IF @llng_Count = 0 BEGIN SELECT 'Error' = 'User ''' + @astr_User + ''' could not be found.' RETURN ( -2 ) END ELSE BEGIN SELECT spid, 'Status' = CONVERT ( CHAR(10), status ), 'login' = CONVERT ( CHAR (15), loginame), 'NT Account' = CONVERT ( CHAR (12), nt_username), 'Workstation Id' = CONVERT ( CHAR (15), hostname), blk = CONVERT ( CHAR (5), blocked), dbname = CONVERT ( CHAR (20), db_name(dbid) ), 'Program' = CONVERT ( CHAR (10), program_name), 'Command' = CONVERT ( CHAR (20), cmd ) FROM master.dbo.sysprocesses WHERE spid BETWEEN 0 and 32767 AND UPPER ( nt_username ) LIKE UPPER ( @lstr_user ) ORDER BY loginame, hostname, spid END END ELSE BEGIN /* All Users & Processes */ SELECT spid, 'Status' = CONVERT ( CHAR(10), status ), 'login' = CONVERT ( CHAR (15), loginame), 'NT Account' = CONVERT ( CHAR (12), nt_username), 'Workstation Id' = CONVERT ( CHAR (15), hostname), blk = CONVERT ( CHAR (5), blocked), dbname = CONVERT ( CHAR (20), db_name(dbid) ), 'Program' = CONVERT ( CHAR (10), program_name), 'Command' = CONVERT ( CHAR (20), cmd ) from master.dbo.sysprocesses where spid BETWEEN 0 and 32767 ORDER BY loginame, hostname, spid END END RETURN ( 0 ) END GRANT EXECUTE ON usp_ListUsers TO PUBLIC GO SET QUOTED_IDENTIFIER OFF GO SET ANSI_NULLS ON GO SETUSER go PRINT 'Building usp_ListUsers - Finished' GO
If you have any questions, feel free to contact me.