A single sentence in a man page doesn't stand alone. If you look at the SYNOPSIS section of the xargs man page on macOS you'll see:
Every time you see "replstr" on this man page as underlined text, it will be referring to the option-argument given to a -I or a -J option. Every time you see "replacements" on this man page as underlined text, it will be referring to the option-argument to the -R option. As noted on the description of the -I option, if no -R option is present on the command line, the value of "replacements" defaults to 5.
In the command line:
or the better command line (using fewer system resources, running faster, and producing the same output):
there are two occurrences of the string {}: first occurrence is as the option-argument to the -I option and second is in the quoted argument to the echo command. With the -I {} option, each time {} appears (or occurs) in the command line arguments that xargs will be executing, it will be replaced by the contents of the current line of input read from standard input. So, if you get:
from one of the above command lines, you'll get:
from the command line:
in other words, each occurrence of the -I option-argument in the command line arguments will be replaced by a copy of the current input line.
Can I use xargs to send a list of commands to a process, to be acted upon individually? Here's what I have: a file that contains numbers, one per line. The desired outcome it to send each number to a DB2 query. I thought xargs would work, but it doesn't. I tried it like this:
cat file | xargs |... (4 Replies)
I discovered that GNU's xargs has a -P option to allow its processes to run in parallel. Great! Is this a GNU thing, or is it supported by other platforms as well? (4 Replies)
Hi,
I have a requirement to RCP the files from remote server to local server.
Also the RCP has to run in parallel. However using 'xargs' retrives 2 file names during each loop. How do we restrict to only one file name using xargs and loop till remaining files.
I use the below code for... (2 Replies)
Hello there,
Let me show you a simple example of what I am trying to achieve:
1) I have an input text file with some lines:
1 a
2 b
3 c
2) And I want to run a command with these lines as arguments (+ arbitrary extra arguments). For example:
$ command "1 a" "2 b" "3 c" "bye"
I... (7 Replies)
hi
Could any one please tell me the option using which we can run multiple commands using xargs
I have list of files, I want to run dos2unix and chmod at one shot on them
I tried google n searched man pages but couldnt really find the solution , please help
right now im doing this
ls... (4 Replies)
I have dir with many files ( close to 4M ) .
$ ls -la
total 76392
drwxr-xr-x 10 oracle dba 512 Jun 06 14:39 .
drwxr-xr-x 11 oracle dba 512 Dec 20 13:21 ..
drwxr-xr-x 2 oracle dba 39074816 Jun 15 14:07 ad
I am trying to delete them using... (8 Replies)
Using the bash shell I'm trying to either create a command for the command line or a script that will show netstat info for a given process name. Here is an example of what I'm trying to do:$ ps aux |grep catalina |grep -v grep | awk '{print $2}'
5132
$ netstat -nlp |grep 5132
(Not all processes... (11 Replies)
Hello, I need some help with xargs
$ ls
aaa bbb ccc ddd$ ls | xargs -I{} ls -la {}
-rw-rw-r--. 1 xxx xx 0 May 30 20:04 aaa
-rw-rw-r--. 1 xxx xx 0 May 30 20:04 bbb
-rw-rw-r--. 1 xxx xx 0 May 30 20:04 ccc
-rw-rw-r--. 1 xxx xx 0 May 30 20:04 dddit's possible to have output like this with... (3 Replies)
Hi,
can anyone tell me in detail ?
what the following do in detail ?
I am trying to get a largest number in a list
Thanks
Tao
LARGEST=$(echo $* | xargs -n1 | sort -nr | tail -1) (3 Replies)