I wonder why systems don't link /bin/sh to BASH rather than DASH by default if BASH is a better shell?
bash is no better (or worse) than dash - just different. Every UNIX system has some default shell, which you can reach under "/bin/sh". In many Linux-variants this is bash (RedHat-based variants, Slackware, ....), in some others (debian-based variants) it is dash, and in my beloved IBM AIX Unix it is a ksh88.
This is why you can specify explicitly by which shell your script should be run using the "shebang", as it is called: if the absolute first 2 bytes of an executable file are "#!" then the named executable following this is run and fed the following text as input.
means: load "/bin/bash" and feed it the rest of the text as input. You can even force the system to use your own version if you want to try something with a special version you installed:
and you can specify any other executable as well, for instance awk:
Hey guys i need help i have a script to push a password to a remote server the only problem is the $ENCRYPT variable has $'s in it (from the encrypted password in the shadow file) and they drop out when apending to the shadow file via the usermod command so
$1$Q/6a08n$EoAcBuR/YnoCQC shows up as... (3 Replies)
Hi,
I have a script where I am trying to set a local variable using the following,
MYVAR="$NAME"_"$NAME2".txt
where say,
NAME = one
NAME2 = two
so I want the output one_two.txt but what I am getting is,
two.txt
basically the $NAME2 is overwriting, what am I doing wrong?
... (3 Replies)
Hi, I am trying to unzip a file( $pfile, it contains a couple of files and 4 folders with subfolders and files) and have its contents go into a directory instead of into a folder in that directory (ZZZZ), I have the following script:
#Unzip the build
unzip -o "$HOME/ZZZZ/$pfile" -d... (2 Replies)
Dear All,
we have a command output which looks like :
Total 200 queues in 30000 Kbytes
and we're going to get "200" and "30000" for further process. currently, i'm using :
numA=echo $OUTPUT | awk '{print $2}'
numB=echo $OUTPUT | awk '{print $5}'
my question is : can I use just one... (4 Replies)
I am facing a problem while storring the grep results into a variable. I need to count the occurence of the pattern \, in a file and store that in a variable. I have given the below command
p=`grep -c '\\,' filename`
But while echoing the variable, i am getting the total number of lines in... (2 Replies)
Hi, I'm new to these forums, and I'm hoping that someone can solve this problem...
To make things short:
I have DD-wrt set up on a router.
I'm trying to run a script in CRON that fetches the daily password from my database using SSH.
CRON is set like so(in web interface):
* * * *... (4 Replies)
Hi All,
I'm trying to run a similar script to copy a files from one location to another.
#!/bin/bash
source="/home/pradeepk/a.txt"
destination="/home/pradeepk/dir1"
cp $source $destinationi'm getting following error.
cp: cannot stat `/home/pradeepk/a.txt\r': No such file or directorywhen... (1 Reply)
I have a shell script (.sh) and I want to pass a parameter value to the awk command but I am getting exception, please assist.
diff=$1$2.diff
id=$2 new=new_$diff
echo "My id is $1"
echo "I want to sync for user account $id"
##awk command I am using is as below
cat $diff | awk... (2 Replies)
I need help with one of my shell script. The script is working fine but i need to add two condition -
i need to get rid of all the below ftp messages and need to have only ftp completed or failed message.
example when i run the script i get below lines -
Connected to xxxx
220 (vsFTPd... (1 Reply)
I have the following script, and I want to assign the output ($10 and $5) from awk to N and L:
grdinfo data.grd | awk '{print $10,$5}'| read N L
output from gridinfo data.grd is: data.grd 50 100 41 82 -2796 6944 0.016 0.016 3001 2461. where N and L is suppose to be 3001 and 100. I use... (8 Replies)
Discussion started by: geomarine
8 Replies
LEARN ABOUT OSF1
return
exit(1) User Commands exit(1)NAME
exit, return, goto - shell built-in functions to enable the execution of the shell to advance beyond its sequence of steps
SYNOPSIS
sh
exit [n]
return [n]
csh
exit [ ( expr )]
goto label
ksh
*exit [n]
*return [n]
DESCRIPTION
sh
exit will cause the calling shell or shell script to exit with the exit status specified by n. If n is omitted the exit status is that of
the last command executed (an EOF will also cause the shell to exit.)
return causes a function to exit with the return value specified by n. If n is omitted, the return status is that of the last command exe-
cuted.
csh
exit will cause the calling shell or shell script to exit, either with the value of the status variable or with the value specified by the
expression expr.
The goto built-in uses a specified label as a search string amongst commands. The shell rewinds its input as much as possible and searches
for a line of the form label: possibly preceded by space or tab characters. Execution continues after the indicated line. It is an error to
jump to a label that occurs between a while or for built-in command and its corresponding end.
ksh
exit will cause the calling shell or shell script to exit with the exit status specified by n. The value will be the least significant 8
bits of the specified status. If n is omitted then the exit status is that of the last command executed. When exit occurs when executing
a trap, the last command refers to the command that executed before the trap was invoked. An end-of-file will also cause the shell to exit
except for a shell which has the ignoreeof option (See set below) turned on.
return causes a shell function or '.' script to return to the invoking script with the return status specified by n. The value will be the
least significant 8 bits of the specified status. If n is omitted then the return status is that of the last command executed. If return
is invoked while not in a function or a '.' script, then it is the same as an exit.
On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:
1. Variable assignment lists preceding the command remain in effect when the command completes.
2. I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not
performed.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO break(1), csh(1), ksh(1), sh(1), attributes(5)SunOS 5.10 15 Apr 1994 exit(1)