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 ULTRIX
grep
grep(1) General Commands Manual grep(1)Name
grep, egrep, fgrep - search file for regular expression
Syntax
grep [option...] expression [file...]
egrep [option...] [expression] [file...]
fgrep [option...] [strings] [file]
Description
Commands of the family search the input files (standard input default) for lines matching a pattern. Normally, each line found is copied
to the standard output.
The command patterns are limited regular expressions in the style of which uses a compact nondeterministic algorithm. The command patterns
are full regular expressions. The command uses a fast deterministic algorithm that sometimes needs exponential space. The command pat-
terns are fixed strings. The command is fast and compact.
In all cases the file name is shown if there is more than one input file. Take care when using the characters $ * [ ^ | ( ) and in the
expression because they are also meaningful to the Shell. It is safest to enclose the entire expression argument in single quotes ' '.
The command searches for lines that contain one of the (new line-separated) strings.
The command accepts extended regular expressions. In the following description `character' excludes new line:
A followed by a single character other than new line matches that character.
The character ^ matches the beginning of a line.
The character $ matches the end of a line.
A . (dot) matches any character.
A single character not otherwise endowed with special meaning matches that character.
A string enclosed in brackets [] matches any single character from the string. Ranges of ASCII character codes may be abbreviated
as in `a-z0-9'. A ] may occur only as the first character of the string. A literal - must be placed where it can't be mistaken as
a range indicator.
A regular expression followed by an * (asterisk) matches a sequence of 0 or more matches of the regular expression. A regular
expression followed by a + (plus) matches a sequence of 1 or more matches of the regular expression. A regular expression followed
by a ? (question mark) matches a sequence of 0 or 1 matches of the regular expression.
Two regular expressions concatenated match a match of the first followed by a match of the second.
Two regular expressions separated by | or new line match either a match for the first or a match for the second.
A regular expression enclosed in parentheses matches a match for the regular expression.
The order of precedence of operators at the same parenthesis level is the following: [], then *+?, then concatenation, then | and new
line.
Options-b Precedes each output line with its block number. This is sometimes useful in locating disk block numbers by context.
-c Produces count of matching lines only.
-e expression
Uses next argument as expression that begins with a minus (-).
-f file Takes regular expression (egrep) or string list (fgrep) from file.
-i Considers upper and lowercase letter identical in making comparisons and only).
-l Lists files with matching lines only once, separated by a new line.
-n Precedes each matching line with its line number.
-s Silent mode and nothing is printed (except error messages). This is useful for checking the error status (see DIAGNOSTICS).
-v Displays all lines that do not match specified expression.
-w Searches for an expression as for a word (as if surrounded by `<' and `>'). For further information, see only.
-x Prints exact lines matched in their entirety only).
Restrictions
Lines are limited to 256 characters; longer lines are truncated.
Diagnostics
Exit status is 0 if any matches are found, 1 if none, 2 for syntax errors or inaccessible files.
See Alsoex(1), sed(1), sh(1)grep(1)