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)
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)
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)
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)
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)
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)
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)
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)
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 SUSE
dropuser
DROPUSER(1) PostgreSQL Client Applications DROPUSER(1)NAME
dropuser - remove a PostgreSQL user account
SYNOPSIS
dropuser [ option... ] [ username ]
DESCRIPTION
dropuser removes an existing PostgreSQL user. Only superusers and users with the CREATEROLE privilege can remove PostgreSQL users. (To
remove a superuser, you must yourself be a superuser.)
dropuser is a wrapper around the SQL command DROP ROLE [drop_role(7)]. There is no effective difference between dropping users via this
utility and via other methods for accessing the server.
OPTIONS
dropuser accepts the following command-line arguments:
username
Specifies the name of the PostgreSQL user to be removed. You will be prompted for a name if none is specified on the command line.
-e
--echo Echo the commands that dropuser generates and sends to the server.
-i
--interactive
Prompt for confirmation before actually removing the user.
dropuser 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 the value begins with a slash, it is used as the directory
for the Unix domain socket.
-p port
--port port
Specifies the TCP 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
--no-password
Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as
a .pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to
enter a password.
-W
--password
Force dropuser to prompt for a password before connecting to a database.
This option is never essential, since dropuser will automatically prompt for a password if the server demands password authentica-
tion. However, dropuser will waste a connection attempt finding out that the server wants a password. In some cases it is worth
typing -W to avoid the extra connection attempt.
ENVIRONMENT
PGHOST
PGPORT
PGUSER Default connection parameters
This utility, like most other PostgreSQL utilities, also uses the environment variables supported by libpq (see in the documentation).
DIAGNOSTICS
In case of difficulty, see DROP ROLE [drop_role(7)] and psql(1) for discussions of potential problems and error messages. The database
server must be running at the targeted host. Also, any default connection settings and environment variables used by the libpq front-end
library will apply.
EXAMPLES
To remove user joe from the default database server:
$ dropuser joe
To remove user joe using the server on host eden, port 5000, with verification and a peek at the underlying command:
$ dropuser -p 5000 -h eden -i -e joe
Role "joe" will be permanently removed.
Are you sure? (y/n) y
DROP ROLE joe;
SEE ALSO createuser(1), DROP ROLE [drop_role(7)]
Application 2010-05-14 DROPUSER(1)