How can I grep for a certain letter that only shows on the 3rd letter or character.
ex:
ASGHDY
SHTYRD
SDTYRD
IGIKGD
I only want the TY part of the 3rd character
so output would only be SHTYRD and DDTYRD - I only want the TY on the 3rd character.
THANKS (5 Replies)
Hi,
I am learning unix shell scripting. I want to create a utiltiy. I will explain about that. When I run my utility, it will display only the directories of a particular directory like the below output. For example
My current directory is /home/balamv and it has 3 directories called Andrew,... (9 Replies)
Hi
I would like to accept in a string from user like
username/pwd@dbname
suppose the user does not input @ then i should throw an error that @ symbol missing . How to achieve this
Thanks in advance
Suresh (6 Replies)
Hi,
For example, i have a string
"123 456 789 abc 111 222 333"
and I would like to delete all the characters before abc so that it becomes
"abc 111 222 333"
how can i do that in unix? using sed?
note: I actually don't know how many words/charachters before "abc", so the "cut"... (9 Replies)
Hi All,
Can anyone help me please,
I have a word like below.
6,76
I want to read this word and check if it has "," (comma) and if yes then i want to replace it with "." (dot). That means i want to be changed to 6.76
If the word doesnot contain "," then its should not be changed.
Eg.
... (6 Replies)
Friends, I'm looking for a command that delete the first tho caractere in a word. Here is an exp :
I want to replace "20091001" by "091001"
or "replace" by "place"
Thx, (13 Replies)
Hi friends,
I am working in a korn shell. i want to know the command which gives me the previous one character and next one character of a given keyword in a string?
for exmaple:
input string: /bin/dir/folder1/.proc_name^folderone
Keyword: proc_name
output : .^
... (10 Replies)
Hi,
I have a command in my bash script, searchDirectoryName.sh:
DIR_NAME=$(find . -type d)
echo "${DIR_NAME}"
.
./Dir1
./Dir1/1.0.2.1
./Dir2
./Dir2/1.1
./Dir3
./Dir3/2.2.1
How can I select only following directory names with second subdirectoies and without first ./ in the... (3 Replies)
How can I represent the position of 1 (considering only the 1s after the colon) in the word from field5 and above; counting from right to left.
Input:
TT-124 06-03-14 08-02-10 FAS CAT1:10
TT-125-1 05-03-14 10-06-08 CAS CAT2:1010 FAT1:10000
TT-125-3 07-03-14 11-02-06 FAS FAT1:1101... (6 Replies)
Hi,
I have a file which looks like this
id integer,
name string,
create_dt date,
I want to remove all words that are present before the character ,
My output should be
id,
name,
create_dt,
Thanks
wah (2 Replies)
Discussion started by: wahi80
2 Replies
LEARN ABOUT POSIX
export
EXPORT(P) POSIX Programmer's Manual EXPORT(P)
NAME
export - set the export attribute for variables
SYNOPSIS
export name[=word]...
export -p
DESCRIPTION
The shell shall give the export attribute to the variables corresponding to the specified names, which shall cause them to be in the envi-
ronment of subsequently executed commands. If the name of a variable is followed by = word, then the value of that variable shall be set to
word.
The export special built-in shall support the Base Definitions volume of IEEE Std 1003.1-2001, Section 12.2, Utility Syntax Guidelines.
When -p is specified, export shall write to the standard output the names and values of all exported variables, in the following format:
"export %s=%s
", <name>, <value>
if name is set, and:
"export %s
", <name>
if name is unset.
The shell shall format the output, including the proper use of quoting, so that it is suitable for reinput to the shell as commands that
achieve the same exporting results, except:
1. Read-only variables with values cannot be reset.
2. Variables that were unset at the time they were output need not be reset to the unset state if a value is assigned to the variable
between the time the state was saved and the time at which the saved output is reinput to the shell.
When no arguments are given, the results are unspecified.
OPTIONS
See the DESCRIPTION.
OPERANDS
See the DESCRIPTION.
STDIN
Not used.
INPUT FILES
None.
ENVIRONMENT VARIABLES
None.
ASYNCHRONOUS EVENTS
Default.
STDOUT
See the DESCRIPTION.
STDERR
The standard error shall be used only for diagnostic messages.
OUTPUT FILES
None.
EXTENDED DESCRIPTION
None.
EXIT STATUS
Zero.
CONSEQUENCES OF ERRORS
Default.
The following sections are informative.
APPLICATION USAGE
None.
EXAMPLES
Export PWD and HOME variables:
export PWD HOME
Set and export the PATH variable:
export PATH=/local/bin:$PATH
Save and restore all exported variables:
export -p > temp-fileunset a lot of variables... processing. temp-file
RATIONALE
Some historical shells use the no-argument case as the functional equivalent of what is required here with -p. This feature was left
unspecified because it is not historical practice in all shells, and some scripts may rely on the now-unspecified results on their imple-
mentations. Attempts to specify the -p output as the default case were unsuccessful in achieving consensus. The -p option was added to
allow portable access to the values that can be saved and then later restored using; for example, a dot script.
FUTURE DIRECTIONS
None.
SEE ALSO
Special Built-In Utilities
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
online at http://www.opengroup.org/unix/online.html .
IEEE /The Open Group 2003 EXPORT(P)