10 More Discussions You Might Find Interesting
1. What is on Your Mind?
It always seemed to me that these utils are siblings.
All they do are that substitute values for variables, rearrange the parameters, and confuse the input with the output. :)
I tried to display their main signature in table together. To show their similarities (3 Replies)
Discussion started by: nezabudka
3 Replies
2. UNIX for Dummies Questions & Answers
Hi,
i am witing a function in a shell script which will echo the file name and witre in to the new line, but i dont get expected results. The below is my code
#!/bin/bash
DATE=$1
myview(){
base_name=$1
echo -ne "${base_name}${DATE}">> /path/to/file/txt
}
myview sample3030
myview... (5 Replies)
Discussion started by: vikatakavi
5 Replies
3. Shell Programming and Scripting
my command deletes the oldest file from a folder and I'd like to have some type of output when the file is selected or deleted.
ls -t -1 | tail -n 1 | xargs rm
I'm not sure how to incorporate echo into this.
Thanks, (2 Replies)
Discussion started by: evanlivingston
2 Replies
4. Shell Programming and Scripting
Hi,when I run my first shell script,I got something that doesn't work right.
I wrote this code in the script.
echo -e "Hello,World\a\n"But the screen print like this:
-e Hello,World
The "-e" wasn't supposed to be printed out.
Can anyone help me out?:wall:
Many thanks!:) (25 Replies)
Discussion started by: Demon
25 Replies
5. Shell Programming and Scripting
Hi,
When I run:
echo "\033I see hi in color, but if I run this color is not shown, why?
(echo "\033Thanks
Israel.
---------- Post updated at 05:17 AM ---------- Previous update was at 04:43 AM ----------
DONE!!
I had to run more -v.
Thanks (4 Replies)
Discussion started by: iga3725
4 Replies
6. Shell Programming and Scripting
#!/bin/sh
something(){
echo "Inside something"
echo $1 $2
}
val=$(something "Hello " "world")
Output expected:
Inside somethingHello world
But it's not echoing. (4 Replies)
Discussion started by: cola
4 Replies
7. UNIX for Dummies Questions & Answers
Bit of a weird one i suppose, i want to use an echo inside an echo... For example...
i have a script that i want to use to take users input and create another script. Inside this script it creates it also needs to use echos...
echo "echo "hello"" >$file
echo "echo "goodbye"" >$file
... (3 Replies)
Discussion started by: mokachoka
3 Replies
8. Shell Programming and Scripting
I have entry in the my .profile like below, but still i see $PWD is not defied in my system
export PS1=$LOGNAME@`hostname`':'$PWD'>'
echo $PWD also gives me nothing, my env list also give no entry for PWD.Can someone help me setting PWD variable.
I use /bin/sh (9 Replies)
Discussion started by: yesmani
9 Replies
9. Shell Programming and Scripting
Hallo,
I need to test a String (a special ip number-string).
So I want to run that:
ipadress=172.0.0.0
# for debugging:
echo $ipadress | egrep -e '172\.?\.??\.??$'
# the test that doesnt work
if test -z `echo $ipadress | egrep -e '172\.?\.??\.??$'` != ""
then
echo "match"
else... (1 Reply)
Discussion started by: wiseguy
1 Replies
10. UNIX for Dummies Questions & Answers
without using ls, just using echo so purely pattern matching
I can say echo */ <-- lists directories
but how would I match files? surely something like *!/ or * but neither work ?
it seems like there isn't much that I can put in but surely i should be able to put any ascii... (1 Reply)
Discussion started by: james hanley
1 Replies
XARGS(1L) XARGS(1L)
NAME
xargs - build and execute command lines from standard input
SYNOPSIS
xargs [-0prtx] [-e[eof-str]] [-i[replace-str]] [-l[max-lines]] [-n max-args] [-s max-chars] [-P max-procs] [--null] [--eof[=eof-str]]
[--replace[=replace-str]] [--max-lines[=max-lines]] [--interactive] [--max-chars=max-chars] [--verbose] [--exit] [--max-procs=max-procs]
[--max-args=max-args] [--no-run-if-empty] [--version] [--help] [command [initial-arguments]]
DESCRIPTION
This manual page documents the GNU version of xargs. xargs reads arguments from the standard input, delimited by blanks (which can be pro-
tected with double or single quotes or a backslash) or newlines, and executes the command (default is /bin/echo) one or more times with any
initial-arguments followed by arguments read from standard input. Blank lines on the standard input are ignored.
xargs exits with the following status:
0 if it succeeds
123 if any invocation of the command exited with status 1-125
124 if the command exited with status 255
125 if the command is killed by a signal
126 if the command cannot be run
127 if the command is not found
1 if some other error occurred.
OPTIONS
--null, -0
Input filenames are terminated by a null character instead of by whitespace, and the quotes and backslash are not special (every
character is taken literally). Disables the end of file string, which is treated like any other argument. Useful when arguments
might contain white space, quote marks, or backslashes. The GNU find -print0 option produces input suitable for this mode.
--eof[=eof-str], -e[eof-str]
Set the end of file string to eof-str. If the end of file string occurs as a line of input, the rest of the input is ignored. If
eof-str is omitted, there is no end of file string. If this option is not given, the end of file string defaults to "_".
--help Print a summary of the options to xargs and exit.
--replace[=replace-str], -i[replace-str]
Replace occurences of replace-str in the initial arguments with names read from standard input. Also, unquoted blanks do not termi-
nate arguments. If replace-str is omitted, it defaults to "{}" (like for `find -exec'). Implies -x and -l 1.
--max-lines[=max-lines], -l[max-lines]
Use at most max-lines nonblank input lines per command line; max-lines defaults to 1 if omitted. Trailing blanks cause an input
line to be logically continued on the next input line. Implies -x.
--max-args=max-args, -n max-args
Use at most max-args arguments per command line. Fewer than max-args arguments will be used if the size (see the -s option) is
exceeded, unless the -x option is given, in which case xargs will exit.
--interactive, -p
Prompt the user about whether to run each command line and read a line from the terminal. Only run the command line if the response
starts with `y' or `Y'. Implies -t.
--no-run-if-empty, -r
If the standard input does not contain any nonblanks, do not run the command. Normally, the command is run once even if there is no
input.
--max-chars=max-chars, -s max-chars
Use at most max-chars characters per command line, including the command and initial arguments and the terminating nulls at the ends
of the argument strings. The default is as large as possible, up to 20k characters.
--verbose, -t
Print the command line on the standard error output before executing it.
--version
Print the version number of xargs and exit.
--exit, -x
Exit if the size (see the -s option) is exceeded.
--max-procs=max-procs, -P max-procs
Run up to max-procs processes at a time; the default is 1. If max-procs is 0, xargs will run as many processes as possible at a
time. Use the -n option with -P; otherwise chances are that only one exec will be done.
SEE ALSO
find(1L), locate(1L), locatedb(5L), updatedb(1) Finding Files (on-line in Info, or printed)
XARGS(1L)