Note the difference of the two equivalent entries:
Don't know exactly how to explain it but it seems that when the variable is assigned, there is an extra level of escape that is happening when echoing that variable which returns the different result.
Hi All,
I search the forum for my query, Glad that got solution to it. But i really want to understand how does this command work.
sed -e ':a' -e 's/\("*\),\(*"\)/\1~\2/;ta'
Basically it is replacing all the comma(,) characters in between quotes with a tilde.
Specially what does ':a' ,... (2 Replies)
Hi Guys,
I like to know if i have a process which triggers 10 different child processes.
How to identify out of the 11 processes running which is the parent process and what are the child process?
And if i kill the parent process will the child process be killed.. if not is there a way to... (2 Replies)
I am trying to create a basic script that converts an Oracle script into a Sybase script.
The only things im changing are Datatypes and the to_char and to_date functions.
I am not really 100% sure of the way it works. I have tried running the functions through a loop to replace each word line... (6 Replies)
hi
i was moving a file from one directory to another with the following cmmand
mv /home/hsghh/dfd/parent/file.txt .
while doing so i i accidently
mv /home/hsghh/dfd/dfd .
although i gave ctrl c and terminate the move command some of the file are missing in the parent directory and... (1 Reply)
Hi
I have a questions related 2 commands : 'du' and 'ls'.
Why is the difference between output of 'du' and 'ls' cmd's ?
Command 'du' :
------------------
jakubn@server1 /home/jakubn $ du -s *
4 engine.ksh
1331 scripts
'du -s *' ---> shows block count size on disk (512 Bytes... (5 Replies)
After running nm command on any object file from out put can we get to know that wheather a symbol is a call to a function or definition of function ?
I am searching a class and function definitions inside many .so files.
I have 3 files which contain the symbol but I don't know wheather they... (2 Replies)
Hi Friends,
I need a small help in understanding the below sed command.
$ cat t4.txt
1 root 1 58 0 888K 368K sleep 4:06 0.00% init
1 root 1 58 0 888K 368K sleep 4:06 0.00% init last
$ sed 's/*$//' t4.txt
1 root 1 58 0 888K ... (3 Replies)
I have the following line of code that works wonders. I just don't completely understand it as I am just starting to learn regex. Can you help me understand exactly what is happening here?
find . -type f | grep -v '^\.$' | sed 's!\.\/!!' (4 Replies)
Hi,
can some one suggest me,how "sed" is managed to delete the second field here.
Any explanation on , how the below code is working would be appreciated.
sed 's/^\(*\)::/\1::/' /etc/passwd
sed 's/*:/:/2' /etc/passwd (14 Replies)
Hi Guys,
Could you please kindly explain what exactly the below SED command will do ?
I am quite confused and i assumed that,
sed 's/*$/ /'
1. It will remove tab and extra spaces .. with single space.
The issue is if it is removing tab then it should be Î right ..
please assist.... (3 Replies)
Discussion started by: Nandy
3 Replies
LEARN ABOUT SUNOS
echo
echo(1B) SunOS/BSD Compatibility Package Commands echo(1B)NAME
echo - echo arguments to standard output
SYNOPSIS
/usr/ucb/echo [-n] [argument]
DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output.
echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi-
ronment variables.
For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows:
o echo your current-working-directory's full pathname
o pipe the output through tr to translate the path's embedded slash-characters into space-characters
o pipe that output through wc -w for a count of the names in your path.
example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w"
See tr(1) and wc(1) for their functionality.
The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if
the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape
characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's
echo() also understands a as the audible bell character; however, these commands do not have an -n option.
OPTIONS -n Do not add the NEWLINE to the output.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWscpu |
+-----------------------------+-----------------------------+
SEE ALSO csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5)NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases.
SunOS 5.10 3 Aug 1994 echo(1B)