$# in a script stands for the number of args that were sent in to the script from the command line. This does not include the script itself.
i.e. If there are no arguments sent in from command line to the script, the value of $# will be zero.
In the script Perderabo is checking that there is indeed some input to the script before he proceeds to work on the input.
You can check the man page of ksh for more details about the various parameters set by ksh.
The above bit of code means that if the expression inside the parenthesis evaluates to a non zero value, then execute some_command.
Hi all,
I would like to append list of files to already taken tar backup
file. can anybody help?
last month backup :
cd /accounts/11
tar -cvf monthback.tar *
Now I want to add /accounts/12 to monthback.tar
is it possible?
Krishna (1 Reply)
Hi all & anyone.
I'm trying to selectively backup up some old Apache log files before they are removed from the system (Slackware box).
Have created a file listing of what I want backed up ...Below is a portion of the file ./selectedbkup... (2 Replies)
I am trying to do a full system backup using tar. It then after maybe 12 or so hours comes up with tar: write error: unexpected EOF. I have thoroughly cleaned the drive and tried to use a different drive but it still gives me this error. Can someone help. I am on solaris 8. (1 Reply)
Hello everyone!
I'm trying to make incremental tar archives of a folder for an example. On the box I use is UNIX AIX installed. I tried some sample codes I found on several web pages but with no success. Don't know what I'm doing wrong. Please write some sample code to make incremental tar... (0 Replies)
Hi all,
i need to backup files on network from RHEL 4 machine
tape drive is installed on solaris 10 machine and want ot use this
using
# tar cv /myfiles |ssh -l myuser myhost 'buffer -o /dev/rmt/0 "
to backup these file but getting getting error " sh buffer not found '
even "buffer-1.19-1"... (2 Replies)
Hi friends,
I am planning to backup my Solaris Servers to SAN storage using tar.
Also palnning to automate the job using Crontab.
Can anyone advise how to make the date change automatically everyday for backup.
Pls correct me if I am wrong. Thanks (7 Replies)
Hi all
i'm looking for good advice regarding backup plan becuase its first time to me handle large scale database expected to grow up 10000 - 20000 record per year with daily operations on it
I'm working as sysAdmin in educational organization ( junior level ) with mixed OSes environment... (3 Replies)
I am backing up some data to an NTFS formatted backup drive. I have to preserve the Unix permissions of the data being backed up and therfore use backup into a tar file.
I would like to backup the differnential data in the tar file similiar to how Rsync works so as to save on backup time as it... (1 Reply)
This will be covered elsewhere im sure but i just cant seem to find my exact issue.
I want to backup my systems using tar, command is:
tar -cjpf /backup /bin /etc /home /opt /root /sbin /usr /var /bootWhen i include the / directory it also tar's the /lib /sys /proc /dev filesystems too (and... (8 Replies)
Hi,
Not sure whether this is the right place to post it. I decided to post it here 'coz Advanced and Expert users will most likely have the answer to what I am looking for.
I want to backup scripts that I have access to to a tar file file and zip it. At the moment I am creating a directory... (4 Replies)
Discussion started by: newbie_01
4 Replies
LEARN ABOUT SUNOS
exit
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)