1) "^$user" - what does the ^ symbol do?
The carat means "line starting with".
2)on the part grep -q what does the $ at the end of pass do?
The dollar means "end of line".
The technique posted is not perfect because you could get multiple matches for similar usernames or similar passwords. e.g. fred and freda . The match strings would be better if they included the delimiter (in this case a single space character):
Is the following even possible ? by echo $3, I mean enter password when prompted for it. My main issue is that it would deal with a prompted password, which is passed from the command line like this:
./processing serverA user password
I cannot not use expect here, I heard that was very... (1 Reply)
Can we write a script to telnet to a unix server from unix with the username and password hardcoded in the script??
something like ssh a@b -p password ??? (5 Replies)
I have a database that contains a list of server names, and the password for the root user on several servers (100+). I need to verify the passwords for each of the servers in an automated fashion because the database continues to grow. All of the users that I'm going to test are ROOT. I can't... (1 Reply)
hi all,
i run sqlplus command on unix(HP-UX)
like "sqlplus username/password@serverA @deneme.sql"
but when someone run "ps -ef | grep sqlplus", it can see my username and password :(
How can i hide username and password.
thanx. (1 Reply)
Hi All,
I want to login to a server through SFTP by giving username and password, in an automated script.
I know that this can be done through public key authentication, but my requirement is to login ONLY through username and password.
I am using GNU/Linux server.
Please advise me !!!... (4 Replies)
Hi,
Whenever I open my unix box,after providing username and password I get the following message.
Are you authorised to use this computer as detailed above? (Y)es/(N)o : y
Export: Release 10.2.0.2.0 - Production on Mon May 16 16:00:15 2011
Copyright (c) 1982, 2005, Oracle. All rights... (5 Replies)
Picked up a 3b2 running System V. Works fine, but it requires a username and password. Is the username "root" or "sysadm"? How do I find out and how to I reset it or bypass it?
Thanks. (2 Replies)
Hello,
I am currently working on a project that requires me to remote login into another UNIX system using different credentials. The problem is that progamatically I cannot simply feed the password into the UNIX system. Is there a way to feed the password within one command line statement.
I... (1 Reply)
Hi,
I know this sounds crazy question.. but I am just curious to know what happens next when I enter username and password and hit enter on a new Unix session (using Putty)? I mean which file gets executed, how the default login shell is determined etc...
regards
juzz4fun (5 Replies)
Hi I am new to shell scripting,
Can you please help me in writing a script that can switch user in same server with different user name and same password.
I want to perform some functional task in a particular user and need to switch user and perform same activity in another user and so on ...
... (4 Replies)
Discussion started by: Dew
4 Replies
LEARN ABOUT FREEBSD
vgrindefs
VGRINDEFS(5) BSD File Formats Manual VGRINDEFS(5)NAME
vgrindefs -- language definition data base for vgrind(1)SYNOPSIS
vgrindefs
DESCRIPTION
The vgrindefs file contains all language definitions for vgrind(1). The data base is very similar to termcap(5).
FIELDS
The following table names and describes each field.
Name Type Description
ab str regular expression for the start of an alternate comment
ae str regular expression for the end of an alternate comment
pb str regular expression for start of a procedure
bb str regular expression for start of a lexical block
be str regular expression for the end of a lexical block
cb str regular expression for the start of a comment
ce str regular expression for the end of a comment
sb str regular expression for the start of a string
se str regular expression for the end of a string
lb str regular expression for the start of a character constant
le str regular expression for the end of a character constant
nc str regular expression for a non-comment (see below)
tl bool present means procedures are only defined at the top lexical level
oc bool present means upper and lower case are equivalent
kw str a list of keywords separated by spaces
Non-comments are required to describe a certain context where a sequence that would normally start a comment loses its special meaning. A
typical example for this can be found in Perl, where comments are normally starting with '#', while the string '$#' is an operator on an
array.
REGULAR EXPRESSIONS
Vgrindefs uses regular expression which are very similar to those of ex(1) and lex(1). The characters `^', `$', `:' and `' are reserved
characters and must be "quoted" with a preceding '' if they are to be included as normal characters. The metasymbols and their meanings
are:
$ the end of a line
^ the beginning of a line
d a delimiter (space, tab, newline, start of line)
a matches any string of symbols (like .* in lex)
p matches any alphanumeric name. In a procedure definition (pb) the string that matches this symbol is used as the procedure name.
() grouping
| alternation
? last item is optional
e preceding any string means that the string will not match an input string if the input string is preceded by an escape character ().
This is typically used for languages (like C) which can include the string delimiter in a string by escaping it.
Unlike other regular expressions in the system, these match words and not characters. Hence something like "(tramp|steamer)flies?" would
match "tramp", "steamer", "trampflies", or "steamerflies".
KEYWORD LIST
The keyword list is just a list of keywords in the language separated by spaces. If the "oc" boolean is specified, indicating that upper and
lower case are equivalent, then all the keywords should be specified in lower case.
FILES
/usr/share/misc/vgrindefs File containing terminal descriptions.
EXAMPLES
The following entry, which describes the C language, is typical of a language entry.
C|c::pb=^d?*?d?pd?(a?):bb={:be=}:cb=/*:ce=*/:sb=":se=e":
:lb=':le=e':tl:
:kw=asm auto break case char continue default do double else enum
extern float for fortran goto if int long register return short
sizeof static struct switch typedef union unsigned while #define
#else #endif #if #ifdef #ifndef #include #undef # define else endif
if ifdef ifndef include undef:
Note that the first field is just the language name (and any variants of it). Thus the C language could be specified to vgrind(1) as "c" or
"C".
Entries may continue onto multiple lines by giving a as the last character of a line. Capabilities in vgrindefs are of two types: Boolean
capabilities which indicate that the language has some particular feature and string capabilities which give a regular expression or keyword
list.
SEE ALSO troff(1), vgrind(1)HISTORY
The vgrindefs file format appeared in 4.2BSD.
BSD June 6, 1993 BSD