General :: A Point In Syntax In GNU Programs?
Jun 18, 2011
For some commands the command synopsis (syntax) is given like this:
command [a|b] [args ...]
I take mplayer (perhaps not GNU) to illustrate the point:
mplayer [cdda|cddb]://track[-endtrack][:speed][/device] [options]
mplayer [dvd|dvdnav]://[title|[start_title]-end_title] [options]
An item inside square brackets is optional. The pipe sign is the 'or' logical connective (disjunction). But then, what is [cdda|cddb]?
If optional, I can omit it: it makes no sense because there are more the one possible synopsis for the command line.
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Mar 7, 2011
When ever i open vim, i get the error that the following error: E484: Can't open file/abcd/configFiles/vim/syntax/syntax.vim There was a .vimrc file in my home folder that i have removed.
Still i keep getting the same error. Presently in my home folder there is no .gvimrc or .vimrc file.
But still i keep getting the same error. I am not too sure where this file is mentioned.
Background info: The SHELL has been changed from tcsh to bash Earlier i had created a .vimrc file in tcsh, i have removed the .vimrc in bash SHELL.
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Apr 20, 2011
I am a Novell (now defunct) CNE tring to learn Linux and am having a lot of trouble finding out where the WB 6-6 is wrong in the syntax for adding local4... the the syslog-ng config file. In the instructions there are discrepancies between commas and simi-comma, they are both in the statements in no particular order. there is no pattern to them. Here is what the book shows:
filter f_local4debug { level(debug) and facility(local4); };
When I try to input this in the Gnome terminal window to try and find out where it goes wrong I get the following: -bash: syntax error near unexpected token "(" If I can get the correct syntax I belive I can use the info to get past the rest of this portion of the lesson. I am desperate to learn Linux as the only jobs out there for a Novell CNE are migrations to MS, which really sucks, since MS really really sucks.
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Mar 28, 2011
I recently installed the pptpd server on my system and set it up according to these instructions:HTML Code[URL]t=132029However after setting everything up on attempting to connect to it from a windows machine (windows 7 home premium to be specific) it gives me two errors which are 720 and 800...It reaches "registering your computer on the network" fine and then gives 720 on the first attempt to connect and then 800 on the second attempt to connect...and then on the third 720 and 4th 800 and so on..My system running the server's I.P is 192.168.1.70My system running the windows OS trying to connects I.P is: 192.168.1.66
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Aug 27, 2009
This one has been driving me nuts for some days now:My Gentoo box which is acting as an internet gateway has two point-to-point interfaces, ppp0 (PPPoE to my ISP) and ppp1 (PPTP VPN link to IPREDator). Packets from my local network are just routed through ppp0 and now the fun part starts: I want to MARK (netfilter...) all packets originating from one specific user on that box in order to use another routing table that will contain a default route via the ppp1 interface.Marking seems to work fine as does the second routing table. But quite mysteriously (at least for me), the packets sent out on ppp1 contain the wrong source IP address, namely the address associated with ppp0.So here is what ifconfig and friends tell me:Network interfaces:
Code:
# ifconfig ppp0
ppp0 Protokoll:Punkt-zu-Punkt Verbindung
[code]...
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Jun 3, 2010
I was wondering if there is any way to SSH from one computer to another and completely bypass a router or any other network infrastructure. The reason I ask is because my robot ( same one in this post ) often needs to change which wireless network it automatically connects to, however it is getting annoying to have to drag out a monitor and plug it in along with a keyboard and mouse every time this needs to happen. Instead I'd much rather just plug my laptop into the other computer, SSH in and change the network myself.
So I thought I would ask you kind people if this is possible. The robot's computer has unused ethernet and USB ports, and I'd like to use those if at all possible (and with linux, anything is possible! -- sorta). I thought about doing something with ad-hoc, but this would limit my range (in infrastructure mode I can control the thing anywhere there is internet), and is to be avoided.
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Mar 10, 2010
I have a project directory that contains source code and subdirectories of source code. I want to use the Unix program find to search recursively for the names of files of certain extensions. The versions of find on Linux and Mac OS X behave differently.
# Works in Linux
find . -type f -regex ".*.(py|html)$"
# Neither of these works in Mac OS X
find . -type f -regex ".*.(py|html)$"
find . -type f -regex ".*.(py|html)$"
How do I write this command so that it will run on Mac OS X (and hopefully on Linux too)?
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Mar 13, 2011
I'm trying to sanitize this output from it's metadata to plug this output into GreekTools, but I am getting stuck on sed.
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Mar 7, 2011
I have a requirement to check the following conditions..If my folders are not A and B then list files in the directory else no listing the filesso my if loop is some thing like this.
Code:
if [ $dirName = "C" && $dirName != "A" && != "B" ] then
ls -la
[code]....
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Jan 23, 2011
I have a couple of files which follow this syntax:
*_yyyy-mm-dd_hhhmmm.*
Example:
*_2010-01-01_00h10m.*
*_2010-01-01_01h10m.*
*_2010-01-01_02h10m.*
[Code].....
and delete the others. or maybe move them to a subdirectory to be safe...
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Feb 12, 2010
exec, a option of find command, takes a odd format as followsfind ... -exec command {} ;Is there any explaination about why it takes this kind of format, orsome obscure implication?
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Apr 29, 2011
What is wrong with the following ldif file :
Code:
dn: dc=mydomain
objectclass: dcObject
objectclass: organization
o: My Ldap
dc: mydomain
dn: cn=Manager,dc=mydomain
objectclass: organizationalRole
cn: Manager
Because I get following output :
Code:
[root@1 ~]# /usr/bin/ldapadd -x -D "cn=Manager,dc=mydomain" -W -f /etc/openldap/basic.ldif
Enter LDAP Password:
adding new entry "dc=mydomain"
ldapadd: Invalid syntax (21)
additional info: objectclass: value #0 invalid per syntax
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Jun 9, 2010
how would the syntax of reverse find be..i want to type a name and then find it and delete it from a file i have?
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Aug 20, 2010
I'm working on reorganizing my .bashrc. I moved my aliases to .bash_aliases (which is sourced by .bashrc, but I can't figure out how to enable syntax highlighting for this file. vim seems unable to figure out what language the file is in. It works fine for .bashrc.
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May 23, 2011
Mental note: ignore start-up process scroll.
Okay, now MySQL is just being (even more) difficult. Prior to boot's starting MySQL, I notice the line
Code:
/etc/rc2.d/S19mysql: line 132: syntax error near unexpected token ')'
Near?? Line 132 consists of
Code:
'stop')
Which is proper, and identical to all the other /etc/rc#.d/S19mysql scripts that don't result in errors. C'mon...!
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May 4, 2010
find /opt/postfix/mail/email.com/~spam/~quarantine/ ( -iname * -o -iname .* ) ! -type p -exec grep -i -c admin@email.com {}; -xdev -print
When I do this command I receive this error message:
-bash: syntax error near unexpected token `('
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Dec 1, 2010
I wrote a script to start portal.
Its start portal (not a problem)
Only getting following message:
This is the else before second logic
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Mar 24, 2011
I understand how to get a file from an another computer using the sftp syntax
So i can get the file abc from comp2 to comp1
But how can I send a file cba from comp1 to comp2 using the sftp(I am still using comp1)
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Jul 11, 2010
Recently I edited sudoers file and did typing error. Now neither I can do sudo nor change it.
Code:
sudo visudo -c
>>> sudoers file: syntax error, line 8 <<<
How I can get correct the sudoers file?
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Jun 28, 2011
I'm trying to install the Sun Java plugin to use in Chrome. The installation seems to have gone well, but I have hit an error trying to create a symbolic link of the libnpjp2.so library in the plugins directory of Chrome.
When typing in "in -s /opt/java/jre1.6.0_26/lib/i386/libnpjp2.so" I get "Syntax error near unexpected token `in' ". I'm not sure what could be wrong, I'm in the right directory.
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Oct 20, 2010
The following line is in the /etc/bashrc file. It's fedora 8. I know this is meant to configure the prompt but I don't know what the syntax is specifically doing.PROMPT_COMMAND='echo -ne "33]0;${USER}@${HOSTNAME%%.*}:${PWD/#$HOME/~}07"'I think that 33 is the ASCII character for ESC but not sure what ]0 does or anything after the HOSTNAME variable. Are these xterm control characters? All of my Google search results fail to explain it in any kind of meaningful detail.
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May 28, 2011
I am writing a simple shell script where it checks the condition using if condition.
Code:
if [ $name == "JOHN" ] then admin='YES'; fi
if I use like this I am getting below error
[code]....
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Apr 12, 2011
I'm scratching my head over a very simple netcat-based heartbeat monitoring script i wrote.
here we go:
Code:
echo `date --utc "+%Y-%m-%d %H:%M:%SZ"` script started
[code]...
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Sep 10, 2010
On this Red Hat Box that I am using there is no .vimrc file for the user root. So, I created one and entered only one line to highlight syntax with colors when I am writing scripts in PHP and Bash. But it is not working.
Code:
[root@localhost ~]# cat ~/.vimrc
syntax on
[code]....
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Jan 25, 2010
I am planning on running a script once every five minutes, and the syntax that comes to mind in doing this is the following:
Code:
5 10 15 20 25 30 35 40 45 50 55 * * * * /apps/<script>.pl
Is there a better syntax to use to accomplish this task, or is the above example the way to go?
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May 2, 2010
I am trying to install vlc media player on my backtrack3 but when i am giving a command xvjf to extract bz2 file then
bash: syntax error near unexpected token `('
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Sep 26, 2009
I have a program I use, rrdtool. I need to modify a ds value on every file at the same time. However, using a wildcard (*) to try this operation of all files does not work and instead only updates one file.
Here is the command syntax:
rrdtool tune <file> --maximum traffic_in:100000000000 && rrdtool tune <file> --maximum traffic_out:100000000000
So, how can I do this on every file in the directory?
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Jun 13, 2011
I just joined LinuxQuestions and find no Forum specific to command-line syntax questions, so I'll post it here. Here is the question. I can use:
cp -vr --parents /a/b/c/this /x/y
to create a directory /x/y/a/b/c/this containing this and everything under this.
But how could I create a directory x/y/b/c/this (ie omitting a)? I could MOVE to /a/ and then use
cp -vr --parents b/c/this /x/y
but I really don't want to do the MOVE (and can think of circumstances where I might not be able to).
I'm really looking for something exactly similar to the
tar -C DIRECTORY
switch that allows one to make a virtual move to the directory DIRECTORY before commencing the tar operation.
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Jan 19, 2011
I have been trying to get the following code to run.
Code:
However I am getting the following error:
Is there something that I am missing in the script? I have it as a unix file and tried to make sure that I did not have any extra characters.
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Sep 9, 2010
I've been trying to find a bug in this test script, but haven't been able to so far. I'm not lazy, I promise...just new to Bash so am having a hard time catching syntax errors. I call the script with the option -disableVenusBld, and it still prints "Starting build", which it shouldn't be doing right?
[Code]...
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