Is there any way to use the pipe "|" operator to pass more than one input? For instance do:
(command1) (command2) | command3
with command 3 taking 2 parameters?
is a form of named pipe; bash just cleans up after it by deleting the file it creates. You can use named pipes as in this example:
Code:
$ # create a named pipe called d1:
$ mkfifo d1
$ # send something to it in the background:
$ ls -l > d1 &
[2] 6332
$ # create a file that is new:
$ touch new3
$ ls -l > lsfile
$ #compare a pipe and a file:
$ diff <(cat < d1) lsfile
< total 33224
---
> total 33208
30c30
< prw-r--r-- 1 andrew andrew 0 Mar 22 17:14 d1
---
> prw-r--r-- 1 andrew andrew 0 Mar 22 17:12 d1
57c57
< -rw-r--r-- 1 andrew andrew 5903 Mar 22 17:14 lsfile
---
> -rw-r--r-- 1 andrew andrew 0 Mar 22 17:14 lsfile
[2]+ Done ls -l > d1
Notice that "new" does not show up as a difference. The ls -l in the background is only executed when the pipe is read. Note also that the file "d1" will need to be deleted when you are done.
Using tee, mkfifo for named pipes, and command substitution, you can do what you describe.
Hi 2 all,
i have had AIX 7.2
:/# /usr/IBMAHS/bin/apachectl -v
Server version: Apache/2.4.12 (Unix)
Server built: May 25 2015 04:58:27
:/#:/# /usr/IBMAHS/bin/apachectl -M
Loaded Modules:
core_module (static)
so_module (static)
http_module (static)
mpm_worker_module (static)
... (3 Replies)
Hello.
System : opensuse leap 42.3
I have a bash script that build a text file.
I would like the last command doing :
print_cmd -o page-left=43 -o page-right=22 -o page-top=28 -o page-bottom=43 -o font=LatinModernMono12:regular:9 some_file.txt
where :
print_cmd ::= some printing... (1 Reply)
How to use "mailx" command to do e-mail reading the input file containing email address, where column 1 has name and column 2 containing “To” e-mail address
and column 3 contains “cc” e-mail address to include with same email.
Sample input file, email.txt
Below is an sample code where... (2 Replies)
Experts ,
In the given output of the log file, the 2nd field that is separated by "|" pipe is not aligned well due to the uneven data length, I would like it to align the 2nd column with 37 length (that is disturbed in the output) including the pipe . The two pepe "|" would be in a aligned way... (2 Replies)
Hi,
I have line in input file as below:
3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL
My expected output for line in the file must be :
"1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL"
Can someone... (7 Replies)
Hi Friends,
Can any of you explain me about the below line of code?
mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'`
Im not able to understand, what exactly it is doing :confused:
Any help would be useful for me.
Lokesha (4 Replies)
Hi
how to check input is "empty" and "numeric" in ksh?
e.g:
./myscript.ksh k
output show: invalid number input
./myscript.ksh
output show: no input
./myscript.ksh 10
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i have two rules in my pf.conf file, "pass in all" and "pass out all"
i was having issues with getting pf working to begin with, so i went with
starting from nothing and working on up.
i have an ultrasparc ultra1 200e, with an added 4-port fast ethernet sbus
card, running "3.4 GENERIC#85... (4 Replies)
03-23-2010
