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I let a script A call script B.
I used
nohup a.sh &>/tmp/log &

In script A it calls B directly, without any redirecting or nohup or background.

However A is always "Stopped", while B is...

I let a script A call script B.
I used
nohup a.sh &>/tmp/log &

In script A it calls B directly, without any redirecting or nohup or background.

However A is always "Stopped", while B is...

My system is ubuntu, can I use PMake ?

I found an interesting thing with ls. do the following steps in your linux:
open a terminal
mkdir x
cd x
echo "aaa" > test1
ls
<you will see test1>

Don't close the terminal, open another...

Thanks all.
Can I get an official link or resource for whether mv is atomic? I am writing a tech document of them. Thanks.

if I rename a dir
mv dir dir2

Is this operation atomic? Suppose there 100 files in dir, does linux rename them one by one or at once?

In other words, is there a time at which both dir and...

BTW, I understand time can be used to measure command execution, say
time ls -ltr

BUT, how can I embed `time` in my script to measure the execution time? In other words, I want to record time...

Thanks. What do real, user, sys mean?
`man time` does not give any clue

Is there a way to tell how long does a shell script(or a shell command)'s execution take?

Thanks, but what does ## mean here?

If I am not sure of how many fields a string has, say
STR=/homt/root/dir1/dir2/../dirn
how to use "cut -d/ -f" to get dirn ?

Really? Assigned "ww" to an empty string "" ? (Remember shell replaces $TEST with the empty string first)

Suppose I have a script named "sc.sh"
in the script how to print out its name "sc.sh"?

Thanks, what is the difference between:
if [ "$TEST" = "ww" ]
and
if [ "$TEST"="ww" ]

?

TEST is assigned as empty.

>TEST=
>if [ "$TEST"="ww" ] ; then echo not empty ; else echo empty ; fi

But it prints Not Empty. What's wrong here? Thanks.

I want to print "empty" if $TEST is empty.

TEST=
if ${TEST:?} ; then echo empty; fi

But it doesn't work. What's wrong?

Thanks, I tried to follow the thread but my sendmail reports:

>/usr/sbin/sendmail
>sendmail: fatal: open /etc/postfix/main.cf: No such file or directory

BTW, is there a way to use "mail"...

echo "content" | mail email@address -s subject
Where to attach a file with the email?

I know < and << are for re-direction, but never heard of <<<
What is that?
BTW is there >>>?

Another dummy question:
For IE I can double-click it up-left corner to close the browser. how can I set Firefox to do that?

My firefox can't use BackSpace key to go back to previous page. Anybody knows how to set it?

Thanks, but how to explain why it works with somebody's bash ?
BTW the exact syntax works with my another machine, which has bash version:

$ bash --version
GNU bash, version 2.05b.0(1)-release...

Thank you. Here are all the info:

$ ls
drwxr-xr-x 2 root root 4096 2008-02-20 12:03 olddir

$ mv olddir/ newdir/
mv: target `newdir/' is not a directory: No such file or directory

$ which...

Suppose you have a directory called "olddir" exists but no "newdir", you want to rename "olddir" to"newdir"
In previous versions (at least in 2.05b.0) of bash, you can try
mv olddir/ newdir/
OR...

I am using emacs to write c++ code. How to configure it to let the system highlight C++ keywords, variables, etc; and let it automatically indent, just like a common C++ IDE does?

Any suggestions?...