Interpreting Logicals/Environment Variables using the read command
Hi All
I have something that from the outset seems really trivial but in practice is not quite working.
I have the following code sample in my shell script which illustrates the problem
Code:
echo "enter home directory"
read home
mkdir $home/newdir
The user then enters a logical $HOME in the prompt. This is what is displayed on the screen
Code:
enter home directory
$HOME
mkdir: cannot create directory `$HOME/newdir': No such file or directory
If I type the full name into the prompt, it works fine. But this isn't ideal as in the real script, the directory structure could be 10 directories deep. Typing the full path could lead to potential issues.
Is there some way for the read command to interpret environment variables?
hi,
1). i would like to know what is meant by environment variables?
2). is the number of envi variables is a constant number for unix systems?
3). how to see the list of envi variables (and the values of the envi variables)in a single command?
4). if this questions were already asked... (3 Replies)
hi,
I want to create a new EV(Environment Variable) through a c program and I done this thing through setenv() method. But the newly created EV is not permanent, i.e. when I exit from the program the EV also no longer lives. But I want to make it a permanent EV for the current user. Actually I... (6 Replies)
I know there are caveats about using read in pipelines because read is treated by a subshell. I know this but I can't think of any way to accomplish this regardless, I'm still a rookie.
I hope somebody will be able to interpret what it is that I'm trying to accomplish and correct me.
... (2 Replies)
say i define an environment variable in a particular script (upgrade.sh).
my script is upgarde.sh and it calls another script try.sh. will this environment variable be accessible to try.sh also. if not how to I make environment variables global so that they can be used by any script. (2 Replies)
Hello All
i have input files contains 2 values as following
20-Oct-09 Z59408009
20-Oct-09 Z59423060
and i am using the following script
cat /home/or/input.txt | awk '{print $2}' >log
count=0
while read line; do
count=$(( count + 1 ))
echo "UPDATE SAT_JRLTRT SET AVT='X' WHERE... (6 Replies)
I cannot get the following substitution ($ORACLE_SID) to work:
The variable ORACLE_SID is set to wardin my environment. It has been exported.
I have a text file called test.dat:
/u07/oradata/${ORACLE_SID}/extab/finmart/summit/ps_voucher_line_crnt_ex.dbf... (2 Replies)
Hi Experts,
Need your help in understanding the commands to setup the environment variables in hp-ux.
Beleive need to use either set,setenv or export.
I am confused between above three options, when to use which option?
On command line, I have tried both set and setenv but couldn't... (1 Reply)
Hi All,
I need to understand following three environment variables and their usages in HP Unix.
_M_ARENA_OPTS
_M_CACHE_OPTS
PTHREAD_SCOPE_SYSTEM
How does these environment variables influence multi threaded applciation and how do we decide the value of these variables? Is there... (0 Replies)
I have two questions on Linux's free command. Below, I have provided output from my home laptop (fedora 26 ) which has 16GB Physical RAM and a production server (RHEL 7.4) which has 24GB RAM.
Question1. What exactly does the buffer/cache column say in free command's output ? buffer/cache is... (9 Replies)
Hi Folks,
I'm currently trying to read several values into different variables.
Actually, what I'm doing works, but I get an error message.
My attempts are:
read strCPROC strIPROC strAPROC <<<$(ssh -n -T hscroot@$HMC "lshwres -r proc -m $strIDENT --level sys -F \"configurable_sys_proc_units... (11 Replies)
Discussion started by: NKaede
11 Replies
LEARN ABOUT LINUX
gnomevfs-mkdir
gnomevfs-mkdir(1) User Commands gnomevfs-mkdir(1)NAME
gnomevfs-mkdir - make a new directory at a VFS location
SYNOPSIS
gnomevfs-mkdir URI
DESCRIPTION
gnomevfs-mkdir makes a new directory at a URI location that supports the creation of new directories.
OPERANDS
The following operands are supported:
URI Specifies the location of the new directory in standard URI format.
EXAMPLES
Example 1: Making a New Directory in the Home Directory
example% gnomevfs-mkdir file:///home/user/newdir
ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables: NLSPATH.
EXIT STATUS
The exit value 0 is returned regardless of success or failure.
FILES
The following files are used by this application:
/usr/bin/gnomevfs-mkdir Executable to make a new directory at a VFS location
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWgnome-vfs |
+-----------------------------+-----------------------------+
|Interface stability |External |
+-----------------------------+-----------------------------+
SEE ALSO gnomevfs-cat(1), gnomevfs-copy(1), gnomevfs-info(1), gnomevfs-ls(1)NOTES
Written by Stephen Browne, Sun Microsystems Inc., 2004.
SunOS 5.10 6 Sep 2004 gnomevfs-mkdir(1)