I have input file like this
Input file:
ABC|abc_etc_passwd
XYZ|XYZ_etc_passwd
zXY|XYZ_etc_passwd
IJK|test_etc_passwd
KLM|test_etc_passwd
i want to do following in a loop.
grep 'ABC' *abc_etc_passwd*
grep 'XYZ' *XYZ_etc_passwd*
grep 'ZXY' *ZXY_etc_passwd*
i have tried this
for i... (2 Replies)
I am new to solaris and I replaced a faulty tape drive sun DLT7000
But, I am getting the follwoing error when system reboots
ltid deamon error drive index 1 is not correct, drive name /dev/rmt/2cbn is incorrect no such file or directory.
I have two drives the other one is /dev/rmt/0cbn,... (8 Replies)
Dear All
On my Linux server, I need to separate the individual logs coming from various modules concurrently. Please find below a sample of the logs:
But when I run it, I am receiving the following error:
-bash: -f1.log : command not found
-bash: $LOGFILE : ambiguous redirect
Can you... (4 Replies)
Hello all; hope someone can help me cause I am going crazy trying to find a solution for (what I think is simple) issue...looked hard up and down this forum and tried several "solutions" with no avail...so here's my issue:
I have this (parent) script: copylsofdcmcadefttosftpwithmove.sh
... (3 Replies)
Hello Brains,
I was trying to develop a script that would do nslookup using both name and ip of server and format the output and store in an output file. Please find the script below.
#!/usr/bin/ksh
cat $1 | tr "" "" |
while read ip name
do
ERROR="$(nslookup $ip | grep can't | awk -F"... (2 Replies)
Hi everyone,
The following piece of awk code works fine if I use eval builtin
var='$1,$2'
ps | eval "awk '{print $var}'"
But when I try to knock off eval and use awk variable as substitute then I am not getting the expected result
ps | awk -v v1=$var '{print v1}' # output is $1,$2
ps |... (4 Replies)
Dear all,
I am using sed as an alternative to grep in order to get a specific line from each of multiple files located in the same directory. I am using sed because it prints the lines in the correct order (unlike grep).
When I write sed code that prints out the output I get it correct, but... (1 Reply)
Discussion started by: JaNaJaNa
1 Replies
LEARN ABOUT CENTOS
unbuffer
UNBUFFER(1) General Commands Manual UNBUFFER(1)NAME
unbuffer - unbuffer output
SYNOPSIS
unbuffer program [ args ]
INTRODUCTION
unbuffer disables the output buffering that occurs when program output is redirected from non-interactive programs. For example, suppose
you are watching the output from a fifo by running it through od and then more.
od -c /tmp/fifo | more
You will not see anything until a full page of output has been produced.
You can disable this automatic buffering as follows:
unbuffer od -c /tmp/fifo | more
Normally, unbuffer does not read from stdin. This simplifies use of unbuffer in some situations. To use unbuffer in a pipeline, use the
-p flag. Example:
process1 | unbuffer -p process2 | process3
CAVEATS
unbuffer -p may appear to work incorrectly if a process feeding input to unbuffer exits. Consider:
process1 | unbuffer -p process2 | process3
If process1 exits, process2 may not yet have finished. It is impossible for unbuffer to know long to wait for process2 and process2 may
not ever finish, for example, if it is a filter. For expediency, unbuffer simply exits when it encounters an EOF from either its input or
process2.
In order to have a version of unbuffer that worked in all situations, an oracle would be necessary. If you want an application-specific
solution, workarounds or hand-coded Expect may be more suitable. For example, the following example shows how to allow grep to finish pro-
cessing when the cat before it finishes first. Using cat to feed grep would never require unbuffer in real life. It is merely a place-
holder for some imaginary process that may or may not finish. Similarly, the final cat at the end of the pipeline is also a placeholder
for another process.
$ cat /tmp/abcdef.log | grep abc | cat
abcdef
xxxabc defxxx
$ cat /tmp/abcdef.log | unbuffer grep abc | cat
$ (cat /tmp/abcdef.log ; sleep 1) | unbuffer grep abc | cat
abcdef
xxxabc defxxx
$
BUGS
The man page is longer than the program.
SEE ALSO
"Exploring Expect: A Tcl-Based Toolkit for Automating Interactive Programs" by Don Libes, O'Reilly and Associates, January 1995.
AUTHOR
Don Libes, National Institute of Standards and Technology
1 June 1994 UNBUFFER(1)