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 PLAN9
regexp
REGEXP(6) Games Manual REGEXP(6)NAME
regexp - regular expression notation
DESCRIPTION
A regular expression specifies a set of strings of characters. A member of this set of strings is said to be matched by the regular
expression. In many applications a delimiter character, commonly bounds a regular expression. In the following specification for regular
expressions the word `character' means any character (rune) but newline.
The syntax for a regular expression e0 is
e3: literal | charclass | '.' | '^' | '$' | '(' e0 ')'
e2: e3
| e2 REP
REP: '*' | '+' | '?'
e1: e2
| e1 e2
e0: e1
| e0 '|' e1
A literal is any non-metacharacter, or a metacharacter (one of .*+?[]()|^$), or the delimiter preceded by
A charclass is a nonempty string s bracketed [s] (or [^s]); it matches any character in (or not in) s. A negated character class never
matches newline. A substring a-b, with a and b in ascending order, stands for the inclusive range of characters between a and b. In s,
the metacharacters an initial and the regular expression delimiter must be preceded by a other metacharacters have no special meaning and
may appear unescaped.
A matches any character.
A matches the beginning of a line; matches the end of the line.
The REP operators match zero or more (*), one or more (+), zero or one (?), instances respectively of the preceding regular expression e2.
A concatenated regular expression, e1e2, matches a match to e1 followed by a match to e2.
An alternative regular expression, e0|e1, matches either a match to e0 or a match to e1.
A match to any part of a regular expression extends as far as possible without preventing a match to the remainder of the regular expres-
sion.
SEE ALSO awk(1), ed(1), sam(1), sed(1), regexp(2)REGEXP(6)