When you invoke a script
you can enter whatever arguments you want, whether the script likes it or not.
This script will tell you if the number of arguments you gave it is not equal to 1
First it sets envame = parameter #1
Then it tests to see if the envanme variable is "empty". If the variable is empty the script print a message
showing the correct usage of the script, then exits with error status.
FWIW the correct way to do this in modern POSIX shells is:
Hello,
I've got a problem with SED. It's my intention to shorten a file path (removing the file name) with the help of SED. Something like:
tmp\folder1\folder2\blah.txt has to be transformed to
tmp\folder1\folder2\.
I suppose, it's on the tip of my tongue. Perhaps it's close to:
sed... (2 Replies)
Hi,
I have the following file:
--#
--#line1
--#line2
--#line3
--#
--#line4
--#line5
and I want to use something like:
sed 's/--#/newline/g' file > newfile
to substitute the lines containing only '--#', but when I try, it replaces every instance of '--#' with 'newline' and I... (7 Replies)
Hi!
I'm having problems to get this simple script done:
I need to insert 50 lines with the value from the variable dtm=`date +"%d"` into a new file, how do I do that using the "for" or "while" loop commands ? Is there any other command I can use to do that ? I'm new to shell scripting, as you can... (8 Replies)
I am not that good with AWK. Is there a simple awk command I could use to get the word "this" from the following text besides using "awk -F ":" '{print $2} | awk -F " " '{print $1}"?
:this is:that is: (6 Replies)
how do I alias the following command:
ls -l |egrep 'drw|dr-|d--|d-w'
The alias command needs single quotes and so does the above command, so this does not work:
alias LSDIR 'ls -l |egrep 'drw|dr-|d--|d-w' '
My problem is how do I get a listing of only directories?
Solaris 8
SUN Ultra 10... (4 Replies)
I am currently having a problem with displaying multiple occurences of a line using grep/sed combination. Let's say that I do grep "$anything" $file.
When I do this it only displays a single line, but if I do grep -c "$anything" $file it says that there are 3 occurences of $anything, but how can... (15 Replies)
Hi everyone I'm new here and I don't know some command of unix, please help by describe me how it work, I study unix command by myself and can't search exactly means so...Thanks :D
sqlplus -s /nolog @${SQLFILE} ${file_type} >> ${OUTPUT_FILE}
date "+%Y%m%d%H%M%S"
$/usr/bin/echo "INFO : $1"... (2 Replies)
Hi there,
given the file
FIELD1 FIELD2 FIELD3 FIELD4 FIELD5 FIELD6 FIELD7 FIELD8 FIELD9 FIELD10 FIELD11
Why does not
awk '$6 == "FIELD6" {$6=="GREEN"}1' file
do the work and replace"FIELD6" by "GREEN"?
And second question, what is the purpose of the "1" at the end of... (5 Replies)
Discussion started by: la2015
5 Replies
LEARN ABOUT OPENDARWIN
script
SCRIPT(1) BSD General Commands Manual SCRIPT(1)NAME
script -- make typescript of terminal session
SYNOPSIS
script [-a] [-k] [-q] [-t time] [file [command ...]]
DESCRIPTION
The script utility makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an
interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1).
If the argument file is given, script saves all dialogue in file. If no file name is given, the typescript is saved in the file typescript.
If the argument command ... is given, script will run the specified command with an optional argument vector instead of an interactive shell.
Options:
-a Append the output to file or typescript, retaining the prior contents.
-k Log keys sent to program as well as output.
-q Run in quiet mode, omit the start and stop status messages.
-t time Specify time interval between flushing script output file. A value of 0 causes script to flush for every character I/O event. The
default interval is 30 seconds.
The script ends when the forked shell (or command) exits (a control-D to exit the Bourne shell (sh(1)), and exit, logout or control-d (if
ignoreeof is not set) for the C-shell, csh(1)).
Certain interactive commands, such as vi(1), create garbage in the typescript file. The script utility works best with commands that do not
manipulate the screen. The results are meant to emulate a hardcopy terminal, not an addressable one.
ENVIRONMENT
The following environment variable is utilized by script:
SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most
shells set this variable automatically).
SEE ALSO csh(1) (for the history mechanism).
HISTORY
The script command appeared in 3.0BSD.
BUGS
The script utility places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects.
It is not possible to specify a command without also naming the script file because of argument parsing compatibility issues.
When running in -k mode, echo cancelling is far from ideal. The slave terminal mode is checked for ECHO mode to check when to avoid manual
echo logging. This does not work when in a raw mode where the program being run is doing manual echo.
BSD June 6, 1993 BSD