10-04-2008
Quote:
Originally Posted by
vidyadhar85
write in command line or in any script.. it won't change your filename
Errm...yes. The downside of using vi is that vi will create a backup file in /var/tmp when it opens the file. When the file you are going to edit is very large chances are the space in /var/tmp will not suffice and you will get an error opening it.
I hope this helps.
bakunin
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I need some help in removing the header (first line) and the trailer (last line) in a give file...
The data file actually comes in EBCDIC format and I converted it into ASCII..
Now I need to strip off the first line and the last line..
I think we can use sed to do something like this:... (2 Replies)
Discussion started by: madhunk
2 Replies
2. Shell Programming and Scripting
say I want to insert "this is a test" as the first line into file A, besides
echo "this is a test" > /tmp/tmpfile
cat /tmp/tmpfile fileA >> /tmp/result,
is there any simple way I can do it? thanks (7 Replies)
Discussion started by: fedora
7 Replies
3. Shell Programming and Scripting
hi,
My code is
#!/bin/sh
echo "\n\nPlease enter the month of the year(YYYYMM) : \c"
read date_rep
INPUT_L9_FILE=L9_Recharge_Description_EOM_$date_rep.csv
#This part is used to summarise Grand_Total, Balance_Total of file L9_Recharge_Description_EOM_${1}.csv.
awk -F"," '{if(NR!=1)... (5 Replies)
Discussion started by: madfox
5 Replies
4. Shell Programming and Scripting
Hi,
i have a small requirement where i have to get the bottom most line from a file to the topmost position. a small example is shown below..
$ cat beep.txt
It is first documented as being played in southern England.
In the 16th century.
By the end of the 18th century,
Cricket is a... (5 Replies)
Discussion started by: Shellslave
5 Replies
5. UNIX for Dummies Questions & Answers
infile
a b c
A E F
1 2 3 outfile
new line
a b c
A E F
1 2 3 I tried:
sed '1i\
new line' infile > outfilecat outfile
new linea b c
A E F
1 2 3 I don't want the new line be added to the existing first line.
Thanks
Joseph (7 Replies)
Discussion started by: jdhahbi
7 Replies
6. Shell Programming and Scripting
If I have a txt file with
test.txt
somelineoftext
and I want to set that line of text to variable in a script:
so
#!/bin/bash
var=''
becomes
#!/bin/bash
var='somelineoftext' (3 Replies)
Discussion started by: digitalviking
3 Replies
7. Shell Programming and Scripting
Experts,
this has been dumped on me at the last minute.... i am having issue on few files where im getting files from source with BOM mark at the top of every file and i need to check for its existence and remove it.
<feff>
header
Coulmn1|column2......n
i know i can simply do sed on... (5 Replies)
Discussion started by: biztank
5 Replies
8. Shell Programming and Scripting
Hi,
Please excuse for posting new thread on control characters,
I am facing some difficulties in removing the control character from a file extracted from top command,
i am able to see control characters using more command and in vi mode, through cat control characters are not visible ... (8 Replies)
Discussion started by: karthikram
8 Replies
9. Shell Programming and Scripting
Hi,
I have a following file and it has only one occurrence of line that says "Output view:". It could be in middle somewhere ( i don't know the exact location ). I want to move it as the first line of the file.
Input
AAA
BBBB
CCCC
Output view:
XXXX
YYYY
ZZZZ
Output should be:
Output... (13 Replies)
Discussion started by: jakSun8
13 Replies
LEARN ABOUT REDHAT
dropuser
DROPUSER(1) PostgreSQL Client Applications DROPUSER(1)
NAME
dropuser - remove a PostgreSQL user account
SYNOPSIS
dropuser [ options... ] [ username ]
DESCRIPTION
dropuser removes an existing PostgreSQL user and the databases which that user owned. Only users with usesuper set in the pg_shadow table
can destroy PostgreSQL users.
dropuser is a shell script wrapper around the SQL command DROP USER [drop_user(7)] via the PostgreSQL interactive terminal psql(1). Thus,
there is nothing special about removing users via this or other methods. This means that the psql must be found by the script and that a
database server is running at the targeted host. Also, any default settings and environment variables available to psql and the libpq
front-end library do apply.
OPTIONS
dropuser accepts the following command-line arguments:
username
Specifies the name of the PostgreSQL user to be removed. This name must exist in the PostgreSQL installation. You will be prompted
for a name if none is specified on the command line.
-e
--echo Echo the queries that dropuser generates and sends to the server.
-i
--interactive
Prompt for confirmation before actually removing the user.
-q
--quiet
Do not display a response.
createuser also accepts the following command-line arguments for connection parameters:
-h host
--host host
Specifies the host name of the machine on which the server is running. If host begins with a slash, it is used as the directory for
the Unix domain socket.
-p port
--port port
Specifies the Internet TCP/IP port or local Unix domain socket file extension on which the server is listening for connections.
-U username
--username username
User name to connect as (not the user name to drop)
-W
--password
Force password prompt (to connect to the server, not for the password of the user to be dropped).
ENVIRONMENT
PGHOST
PGPORT
PGUSER Default connection parameters
DIAGNOSTICS
DROP USER
All is well.
dropuser: deletion of user "username" failed
Something went wrong. The user was not removed.
If there is an error condition, the backend error message will be displayed. See DROP USER [drop_user(7)] and psql(1) for possibilities.
EXAMPLES
To remove user joe from the default database server:
$ dropuser joe
DROP USER
To remove user joe using the postmaster on host eden, port 5000, with verification and a peek at the underlying query:
$ dropuser -p 5000 -h eden -i -e joe
User "joe" and any owned databases will be permanently deleted.
Are you sure? (y/n) y
DROP USER "joe"
DROP USER
SEE ALSO
createuser(1), DROP USER [drop_user(7)]
Application 2002-11-22 DROPUSER(1)