It is the logical AND operator. See "man test" (though it is usually implemented in the shell).
In your example all three conditions must be true for the result of the whole "test" to be true.
The condition can be paraphrased in this syntactically incorrect way:
Hi ,
Can anyone explains what does the below highlighted statements means:
# Set environment variables
. ${0%/*}/wrkenv.sh
jobName_sh=${0##*/}
jobName=${jobName_sh%.*}
Thanks,
Sri (1 Reply)
Hi, I have this block in a code and I need to know it's meaning:
bool selectEvents = config.get("selectEvents",false);
if (selectEvents) {
ifstream in("events");
while (in) {
int run, evt;
in >> run >> evt;
if (in.eof()) break;
... (5 Replies)
Hi,
Can anyone pls explain me the below SED code in detail.
sed -e :a -e '$!N;s/\n//;ta' -e P -e D
When this code is executed with a file(has 1lac records), it is taking very long time to process.
So I wanted to modify this SED code with equivalant AWK code.
Thanks,
Sri (1 Reply)
I have something like in the script. Can anyone explain what does the sort command does and followed by the sed
sort -r -k3.7,3 -k3.1,3 -k3.4,3 -t: $dir"abc_"$x"_parsed" | sed -e 's/\(\)\(\{3\}\)/\1,\2/2' -e 's/\/2,00/\/200/'
The file abc_"$x"_parsed contains something like below
... (7 Replies)
Hi i am new to shell script can any one please explain me the code below which is written for execution of python scripts which are located in same folder.
please explain the code line by line
ls *.py > xx
while
do
read myline || break
python $myline
done<xx
Thanks
Mukthyar.... (1 Reply)
Hi Guys,
Please help me, I am new to programming and I don’t understand what some parts of this code are doing. I have comments on the parts I know, please help if my understanding of the code is not correct and also help with parts with questions.
awk '
{
gsub( ">",... (1 Reply)
can anyone please explain this code?
sed ':a;N;$!ba;s/]\n//g' file
it replaces lines ending with "]" and concatenates with the next line so that
line1]
line2
becomes
line1line2
i don't understand this part: :a;N;$!ba;
I have noted that I can replace "a" with any letter:
... (1 Reply)
Discussion started by: locoroco
1 Replies
LEARN ABOUT OSF1
true
true(1) General Commands Manual true(1)NAME
true, false - Returns a standard exit value
SYNOPSIS
true
false
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
true: XCU5.0
false: XCU5.0
Refer to the standards(5) reference page for more information about industry standards and associated tags.
DESCRIPTION
The true command returns a 0 (zero) exit value. The false command returns a nonzero exit value. These commands are usually used in input to
shell commands.
NOTES
The special built-in utility : (colon) is sometimes more efficient than the true command.
EXIT STATUS
[Tru64 UNIX] The nonzero value returned by the false command may vary from system to system.
EXAMPLES
To construct a loop in a shell procedure, enter: while true do date sleep 60 done
This procedure displays the date and time once a minute. To stop it, press the Interrupt key sequence.
SEE ALSO
Commands: csh(1), ksh(1), Bourne Shell sh(1b), POSIX shell sh(1p)
Standards: standards(5)true(1)