The first problem is that tail doesn't consider "no input" a failure, so you can't use that as a condition directly. But pipe that to grep and you should be ready to go.
What exactly do you hope to accomplish by piping grep to ls? You want the file name from grep where the match occurred? Or what? ls doesn't read its standard input, and grep prints the actual matching line, not the file name of the match. This can be worked around, but having your requirements would help.
Assuming you want the latest file which matches "adding" and "equation", we can come up with something like
grep -l says to print the file name of the match instead of the actual match, and xargs is the way to use the output of a command as the command-line arguments in another command. (You could use backticks, too, but they have some problems.)
You probably want to do something more (like, exit the script maybe) if $var is empty.
Hello.
System : opensuse leap 42.3
I have a bash script that build a text file.
I would like the last command doing :
print_cmd -o page-left=43 -o page-right=22 -o page-top=28 -o page-bottom=43 -o font=LatinModernMono12:regular:9 some_file.txt
where :
print_cmd ::= some printing... (1 Reply)
Hi everybody,
I am new at Unix/Bourne shell scripting and with my youngest experiences, I will not become very old with it :o
My code:
#!/bin/sh
set -e
set -u
export IFS=
optl="Optl"
LOCSTORCLI="/opt/lsi/storcli/storcli"
($LOCSTORCLI /c0 /vall show | grep RAID | cut -d " "... (5 Replies)
Hello.
Following recommendations for one of my threads, this is working perfectly :
#!/bin/bash
CNT=$( grep -c -e "some text 1" -e "some text 2" -e "some text 3" "/tmp/log_file.txt" )
Now I need a grep success for some thing like :
#!/bin/bash
CNT=$( grep -c -e "some text_1... (4 Replies)
I want to list all files/lines which except those which contain the pattern ' /proc/' OR ' /sys/' (mind the leading blank).
In a first approach I coded:
find / -exec ls -ld {} | grep -v ' /proc/| /sys/' \; > /tmp/list.txt
But this doesn't work. I got an error (under Ubuntu):
grep:... (5 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 all,
can any one suggest me the script to grep multiple strings from ps -ef
pls correct the below script . its not working/
i want to print OK if all the below process are running in my solaris system. else i want to print NOT OK.
bash-3.00$ ps -ef | grep blu
lscpusr 48 42 ... (11 Replies)
AIX 4.2
I am trying to do an rsh grep to search for date records inside server logs by doing this :
xx=`date +"%a %b %d"`
rsh xxx grep "^$XX" zzz
gives :
grep: 0652-033 Cannot open Jun.
grep: 0652-033 Cannot open 11.
But if I do :
xx=`date +"%a %b %d"`
grep "^$XX" zzz
it works... (2 Replies)
Hi,
I don't know hot to make this command work:
ls -laR | grep "^-" | awk '{print $9}'| grep "$.txt"
It should return the list of file .txt
It's important to search .txt at the end of the line, becouse some file name have "txt" in their name but have other extensions (13 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)