I have a few questions about Unix. Can you please help!
1.How do I create an alias that greps the password file for my username and returns my password file entry? Once I get the alias to work I want to be able to let a friend use it .So that he can use the alias to locate his password entry... (1 Reply)
friends i wanted to now whehter there exists a book as a solution to the questions posted in exercies of the Design of Unix Operating system by Maurice J Bach !..its really urgent !! (1 Reply)
hi friends,
How to obtain list of groups we r a member of and redirect it to a file.
how to append the details of current OS to a file.
how to append the estimated file space to a file.
how to append the details of users loged on along wth their current activity into a file.
Thank you...I'm... (3 Replies)
Hi all,
i need to write an ls command which will pick up
ind_01.txt/pak_01.txt from
ind_01.txt
pak_01.txt
usa_01.txt
files in a directory..
i wrote a ls command by storing ind and pak in 2 variables and listing it. Its working fine. But the pattern to be matched should be sent in... (1 Reply)
Hi,
I have multiple servers and each server hosts multiple databases. Now i have requirement as below
1) Create a file in any server which will hold all the database name.
2) Write a shell script that will read the file and connect to each and every database. and log out of it one by... (2 Replies)
i define a function outside the nawk command which trims the leading and trailing spaces like
function TrimSpace(x)
{
y=gsub(/^+|+$/,"",x)
{
return x
}
}
and i want to call this function in nawk commad like.
nawk '{print TrimSpace($1)}' file
Note:... (2 Replies)
Hi I m creating a file which will serve as a virtual harddisk .
I m using following command to create a file.
#dd if=/dev/zero of=/tmp/Sample.dat bs=1M count=1024
I have following doubts regarding the operation.
1) In above example i m creating a file with byte size of 1M .However in... (1 Reply)
Hi,
I am new to Shell Scripting.
I need to pick the files from one directory and place them in another directory based on time stamp.It should pick the files if the files is not accessed for 1 hour.
Can any one please help me how to work on this.
Thanks in Advance.
Regards,
Prakash (1 Reply)
Hi,
I have the date as 20130101 and i need it to rephrased to 2013-01-01.
Any command which can do this. (5 Replies)
Discussion started by: ATWC
5 Replies
LEARN ABOUT OPENDARWIN
printenv
PRINTENV(1) BSD General Commands Manual PRINTENV(1)NAME
printenv, env -- print out the environment, set and print environment
SYNOPSIS
printenv [name]
env [-i] [name=value ...] [utility [argument ...]]
DESCRIPTION
The printenv utility prints out the names and values of the variables in the environment, with one name/value pair per line. If name is
specified, only its value is printed.
Some shells may provide a builtin printenv command which is similar or identical to this utility. Consult the builtin(1) manual page.
The env utility executes utility after modifying the environment as specified on the command line. The option name=value specifies an envi-
ronment variable, name, with a value of value.
The options are as follows:
-i Execute the utility with only those environment values specified. The environment inherited by env is ignored completely.
If no utility is specified, env prints out the names and values of the variables in the environment, with one name/value pair per line.
The env utility is sometimes useful with the ``#!'' construct (see execve(2)). The only difference between ``#!/usr/local/bin/foo'' and
``#!/usr/bin/env /usr/local/bin/foo'' is that the latter works even if /usr/local/bin/foo is itself interpreted. Using env this way also
allows one to reference foo without the path, as well as set up the environment as desired.
ENVIRONMENT
The env utility uses the PATH environment variable is used to locate the requested utility if the name contains no '/' characters.
DIAGNOSTICS
The printenv utility exits 0 on success, and >0 if an error occurs.
The env utility exits 0 on success, and >0 if an error occurs. An exit status of 126 indicates utility was found, but could not be executed.
An exit status of 127 indicates utility could not be found.
COMPATIBILITY
The env utility accepts the - option as a synonym for -i.
SEE ALSO csh(1), sh(1), execvp(3), environ(7)STANDARDS
The env utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'').
HISTORY
The printenv command appeared in 3.0BSD.
BUGS
The env utility doesn't handle utility arguments with equal (``='') signs in their names, for obvious reasons.
BSD June 6, 1993 BSD