Yeah. On many shells, cd ~ is treated as a synonym for cd $HOME, however cd ~logname (where logname is your login name) should work.
But the real issue is that $HOME has been set incorrectly; it should ALWAYS be an absolute pathname.
It looks like you may have accidentally removed the leading "/" from $HOME. If you log out and log back in and $HOME still does not start with a "/", you'll need to dig through your shell's initialization files and correct the line that sets HOME.
Until you find the problem, assuming your login name is mecaka, the following should get your current shell execution environment back to a reasonable state:
I just went back and read my original post. I am not posting this from the browser on my VM, so I could not copy and paste... There is a backslash before home, and there has been the whole time. I apologize for this confusion. I will correct this in the original.
However, if this was not the issue, what is? The PWD is "/home/*****/Documents" (assuming this helps any...)
I must add, I don't know much about the behind-the-scenes workings of programming. There might be something quote-en-qoute "obvious" that I wouldn't have caught.
Hi
I have this code, and i want work with a ls -shalR output in .txt
What i need read to do this??
Where start?
#!/usr/bin/perl
# Allrights- A perl tool for making backups of file permissions
# Copyright (C) 2005 Norbert Klein <norbert@acodedb.com>
# This program is free... (1 Reply)
hi,,
i have perl scipt with line :
system('./try.sh $t $d $m');
in shell scipt try.sh i have the line:
echo $1
its not printing value of $t that i hav passed..y is it so..i am running it from apache web server (2 Replies)
Novice to perl here.
I have created a simple web page in perl, with only one submit button. I would like to execute a bash script on the same server when this button is clicked on.
Is this possible in perl? I have spent a few days researching this and am unable to find any useful information.... (0 Replies)
Hi
I m new to perl. I m trying to write a perl script that calls a bash script; does anyone have a script already that they can provide or help me out? Thanks a lot. (2 Replies)
I am writing a script to write to and a sort txt file. After I sort the file I want to add 2 to each line of the file. My script thus far is
#!/bin/bash
cat > /ramdisk/home/stux/unsortedints.out
COUNT=0
FILE =/ramdisk/home/stux/unsortedints.out
for i in {1..100}
do
NUMBER = $
echo $NUMBER... (3 Replies)
Ok, don't ask me why, but all calls to perl must be called by a shell script. Its really not ideal, but its what I have to work with.
Calling it isnt the issue, its passing in the arguments.
I have about 1000 perl scripts to call by a shell script. Right now, I'm executing the shell script... (3 Replies)
In a bash script, one can call a perl command in the following manner, where "myperlcommand" is a perl command.
perl -e 'myperlcommand(arguments)'
perl -e 'print("UUUU"x4)'
Now, how can one call a bash command from within a perl script? (Suppose that mybashcommand is a bash... (1 Reply)
Hi All,
Just have a requirement, I am executing a bash shell script, my requirement is to catch the pid and job name to a txt file in the same directory, is there anyway to do it? please help me out.
Regards
Rahul
---------- Post updated at 08:42 AM ---------- Previous update was at... (2 Replies)
Hi,
I need help in writing a shell script which can read data from a text file (Cancel_ID.txt) and then calls sqlplus session (Cancel.sql) with the first line parameter of the text file ("0322600453") till all rows are not completed.
... (4 Replies)
Hi, I am complete new to C programming and shell scripting. I just wrote a simple C code to calculate integral using trapezoid rule. I am prompting user to pass me No. of equally spaced points , N , upper and lower limit. My code looks as follows so far:
#include<stdio.h>
#include<string.h>... (2 Replies)
Discussion started by: bjhjh
2 Replies
LEARN ABOUT OSX
su
SU(1) BSD General Commands Manual SU(1)NAME
su -- substitute user identity
SYNOPSIS
su [-] [-flm] [login [args]]
DESCRIPTION
The su utility requests appropriate user credentials via PAM and switches to that user ID (the default user is the superuser). A shell is
then executed.
PAM is used to set the policy su(1) will use. In particular, by default only users in the ``admin'' or ``wheel'' groups can switch to UID 0
(``root''). This group requirement may be changed by modifying the ``pam_group'' section of /etc/pam.d/su. See pam_group(8) for details on
how to modify this setting.
By default, the environment is unmodified with the exception of USER, HOME, and SHELL. HOME and SHELL are set to the target login's default
values. USER is set to the target login, unless the target login has a user ID of 0, in which case it is unmodified. The invoked shell is
the one belonging to the target login. This is the traditional behavior of su.
The options are as follows:
-f If the invoked shell is csh(1), this option prevents it from reading the ``.cshrc'' file.
-l Simulate a full login. The environment is discarded except for HOME, SHELL, PATH, TERM, and USER. HOME and SHELL are modified as
above. USER is set to the target login. PATH is set to ``/bin:/usr/bin''. TERM is imported from your current environment. The
invoked shell is the target login's, and su will change directory to the target login's home directory.
- (no letter) The same as -l.
-m Leave the environment unmodified. The invoked shell is your login shell, and no directory changes are made. As a security precau-
tion, if the target user's shell is a non-standard shell (as defined by getusershell(3)) and the caller's real uid is non-zero, su
will fail.
The -l (or -) and -m options are mutually exclusive; the last one specified overrides any previous ones.
If the optional args are provided on the command line, they are passed to the login shell of the target login. Note that all command line
arguments before the target login name are processed by su itself, everything after the target login name gets passed to the login shell.
By default (unless the prompt is reset by a startup file) the super-user prompt is set to ``#'' to remind one of its awesome power.
ENVIRONMENT
Environment variables used by su:
HOME Default home directory of real user ID unless modified as specified above.
PATH Default search path of real user ID unless modified as specified above.
TERM Provides terminal type which may be retained for the substituted user ID.
USER The user ID is always the effective ID (the target user ID) after an su unless the user ID is 0 (root).
FILES
/etc/pam.d/su PAM configuration for su.
EXAMPLES
su man -c catman
Runs the command catman as user man. You will be asked for man's password unless your real UID is 0.
su man -c 'catman /usr/share/man /usr/local/man'
Same as above, but the target command consists of more than a single word and hence is quoted for use with the -c option being passed
to the shell. (Most shells expect the argument to -c to be a single word).
su -l foo
Simulate a login for user foo.
su - foo
Same as above.
su - Simulate a login for root.
SEE ALSO csh(1), sh(1), group(5), passwd(5), environ(7), pam_group(8)HISTORY
A su command appeared in Version 1 AT&T UNIX.
BSD September 13, 2006 BSD