10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I'm writing a shell script and trying to grep a variable value, it works fine as long as there is a value in /tmp/list.out which is captured in $DSK but sometimes the file tends to be empty and that is where I'm having an issue while using grep which returns nothing. I know I can use something... (15 Replies)
Discussion started by: mbak
15 Replies
2. Shell Programming and Scripting
hi,
i want to check whether a a variable contains some value or is empty in a shell script. so if the variable contains some value i want to do some job and if the variable doesnt contain any value then i need to skip that job.
here is a sample script
read_filenames.sh contains
... (5 Replies)
Discussion started by: Little
5 Replies
3. Red Hat
Hello All,
I am running the below code in my script. I want if jk is empty nothing should be appened to the file total_usage.
but apparently its not happening.Kindy let me know how to do it.
###################################
jk=`ps auxf |grep -w $inputline|tr -s " "|cut -d... (0 Replies)
Discussion started by: ajaincv
0 Replies
4. Shell Programming and Scripting
Hi Folks,
I am trying to read input from single line from a file and pass the read variable to one of the commands. However when I run the script it keeps the variable to be empty. I can however echo the variable ( but why it is empty when it goes to the command).
Any help will be... (6 Replies)
Discussion started by: bhadu
6 Replies
5. Shell Programming and Scripting
I haven't checked any installation script to see how this is done..
But I could not even do following simple task.
How do I Change existing variable value only when user enteres non-empty string. ?
#!/usr/bin/ksh
uid="scott"
# Assign new value user enters to uid, else leave it... (7 Replies)
Discussion started by: kchinnam
7 Replies
6. Shell Programming and Scripting
I have a variable with a new line. I want to check this variable for empty or a new line
Can anyone advise (4 Replies)
Discussion started by: Muthuraj K
4 Replies
7. Shell Programming and Scripting
How to check the variable is empty or not?
aaa=" "
how to check aaa variable is empty or just spacing?
If only spacing inside.. it will asume it is empty.
some are 6 spacing, or 8 spacing.. as long as variable is empty with spacing..
anyone can help me? (2 Replies)
Discussion started by: ryanW
2 Replies
8. Shell Programming and Scripting
I'm very new to writing scripts, so here is my problem...I have the following code already written (in perl)
system "rm file2";
open(FILE2, ">file2");
open(MYINPUTFILE, "file");
while(<MYINPUTFILE>) {
my($line) = $_;
chomp($line);
print file2 "$line\n";
print... (2 Replies)
Discussion started by: ddrew78
2 Replies
9. UNIX for Dummies Questions & Answers
sorry for the title of this thread-
I figured out how to capture empty variable by using-
if
then
........
This thread originally had two parts in it (one for capturing empty variable and the other to get the date time in 14 char format). Once I figured out the solution for the first part... (6 Replies)
Discussion started by: radhika
6 Replies
10. Shell Programming and Scripting
I am trying to assign list of files that created that day to a variable 'filename'
filename=`ls -ltr |grep "Mar 6" | awk '{print$9}'`
If there are no files created that day, my script just hangs, i need help with some login here.
i am also trying to figure out a way to look for files that... (3 Replies)
Discussion started by: gundu
3 Replies
CHSH(1) User Commands CHSH(1)
NAME
chsh - change login shell
SYNOPSIS
chsh [options] [LOGIN]
DESCRIPTION
The chsh command changes the user login shell. This determines the name of the user's initial login command. A normal user may only change
the login shell for her own account; the superuser may change the login shell for any account.
OPTIONS
The options which apply to the chsh command are:
-h, --help
Display help message and exit.
-s, --shell SHELL
The name of the user's new login shell. Setting this field to blank causes the system to select the default login shell.
If the -s option is not selected, chsh operates in an interactive fashion, prompting the user with the current login shell. Enter the new
value to change the shell, or leave the line blank to use the current one. The current shell is displayed between a pair of [ ] marks.
NOTE
The only restriction placed on the login shell is that the command name must be listed in /etc/shells, unless the invoker is the superuser,
and then any value may be added. An account with a restricted login shell may not change her login shell. For this reason, placing /bin/rsh
in /etc/shells is discouraged since accidentally changing to a restricted shell would prevent the user from ever changing her login shell
back to its original value.
FILES
/etc/passwd
User account information.
/etc/shells
List of valid login shells.
/etc/login.defs
Shadow password suite configuration.
SEE ALSO
chfn(1), login.defs(5), passwd(5).
User Commands 06/24/2011 CHSH(1)