echo and grep commands Post: 302597292

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

small question of echo | grep command

Hi, i've got the following: a=`echo $b | grep '^.*/'` i'm storing in the variable the value of the variable b only if it has a / somewhere. It works, but i don't want to print the value. How do i give the value of b to the grep command without the echo? thanks!

2. UNIX for Dummies Questions & Answers

How do I output or echo NONE if grep does not find anything?

I am performing a grep command and I need to know how to echo "NONE" or "0" to my file if grep does not find what i am looking for. echo What i found >> My_File grep "SOMETHING" >> My_File I am sure this is easy, I am sort of new at this! Thanks

3. Shell Programming and Scripting

help with grep and echo

Can't get this to work. Something is wrong with the systax maybe. :o if ] && ] ; then: Thanks

4. Shell Programming and Scripting

SSH, Remote Commands and echo, oh my!

So, HostB has a SSH trust via pre-shared keys from HostA. HostA> ssh HostB hostname HostB HostA> ssh HostB echo `hostname` HostA HostA> ssh HostB 'echo `hostname`' `hostname` HostA> ssh HostB "echo `hostname`" HostA HostA> ssh HostB echo $PS1 user@HostA:$PWD HostA> ssh HostB...

5. Shell Programming and Scripting

Advice using cut & echo combination commands

Hi, I am cutting data from a fixed length test file and then writing out a new record using the echo command, the problem I have is how to stop multiple spaces from being written to the output file as a single space. Example: cat filea | while read line do field1=`echo $line | cut -c1-2` ...

6. UNIX for Dummies Questions & Answers

Having a hard time with the sed/echo commands?

Hello, well what I'm trying to do is to remove underscores from filenames and leaving empty spaces instead: arturas@Universe:/windows/Center/training$ ls big_file failas su shudu arturas@Universe:/windows/Center/training$ a=big_file arturas@Universe:/windows/Center/training$ mv $a `echo...

7. UNIX for Dummies Questions & Answers

Echo out running commands

Is there any way in a script to print out the commands being ran? In DOS script, there is the "@echo on" and "@echo off". so I have a script like this: #!/bin/ksh echo "hello there. moving files." <turn on echoing here> cp thisfile.txt thatfile.txt cp whatfile.prop whyfile.prop <turn...

8. Shell Programming and Scripting

Using echo, grep and wc and outputing to text file

My current line command is as follows: echo -n "text: " ; grep "blah text" ../dir1/filename | wc -l The output to the screen is as needed, but how do I print to a text file?

9. Red Hat

Echo and grep issues

Is there an environment issue that would not allow the following not store and pass the value into this field: underScorePresent=`echo $USER | grep "_" | wc -l` It is running on a new redhat 6.5 OS. The value $USER is set to cpac. It is a vendor code and they are saying it is environment...

10. UNIX for Beginners Questions & Answers

Behaviour of echo commands used by Linux admins

version info : Fedora 28 (Kernel version: 4.16.12-300) shell : bash Using echo command , if I redirect a text like "Chocolate" to a file , all the contents in the file are overwritten as shown below. # cat /tmp/someTest Hello world One more Hello world myLine3 # echo...

LEARN ABOUT ULTRIX

ldlitem

ldlread(3x)															       ldlread(3x)

Name
       ldlread, ldlinit, ldlitem - manipulate line number entries of a common object file function

Syntax
       #include <stdio.h>
       #include <filehdr.h>
       #include <syms.h>
       #include <ldfcn.h>

       int ldlread (ldptr, fcnindx, linenum, linent)
       LDFILE *ldptr;
       long fcnindx;
       unsigned short linenum;
       LINER linent;

       int ldlinit (ldptr, fcnindx)
       LDFILE *ldptr;
       long fcnindx;

       int ldlitem (ldptr, linenum, linent)
       LDFILE *ldptr;
       unsigned short linenum;
       LINER linent;

Description
       The  function  searches	the line number entries of the common object file currently associated with ldptr.  The function begins its search
       with the line number entry for the beginning of a function and confines its search to the line numbers associated with a  single  function.
       The  function  is identified by fcnindx, which is the index of its local symbols entry in the object file symbol table.	The function reads
       the entry with the smallest line number equal to or greater than linenum into linent.

       The and functions provide the same behavior as After an initial call to or can be used to retrieve a series of line number entries  associ-
       ated with a single function.  The function simply finds the line number entries for the function identified by fcnindx.	The function finds
       and reads the entry with the smallest line number equal to or greater than linenum into linent.

       The functions and each return either success or failure.  The function fails if one of the following occurs:

       o    If line number entries do not exist in the object file.

       o    If fcnindx does not index a function entry in the symbol table.

       o    If it does not find a line number equal to or greater than linenum.

       The fails if it does not find a line number equal to or greater than linenum.

See Also
       ldclose(3x), ldopen(3x), ldtbindex(3x), ldfcn(5)

								       RISC							       ldlread(3x)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

small question of echo | grep command

Discussion started by: kfad

2. UNIX for Dummies Questions & Answers

How do I output or echo NONE if grep does not find anything?

Discussion started by: jojojmac5

3. Shell Programming and Scripting

help with grep and echo

Discussion started by: rstone

4. Shell Programming and Scripting

SSH, Remote Commands and echo, oh my!

Discussion started by: Wrathe