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Use "elif". It works like this (see "man awk" for details):

if( <condition> ) {
<code>
} elif( <other condition> ) {
<code>
} ...
else {
<code>
}

You can have as many...

use
else if

iostat -E

will list serial numbers for hard drives. This is the only way know of to tell if a disk was actually replaced with another disk. But you need to know the previous serial number. I do...

then try this :)
grep "^[^|]*|AB" infile
or
awk -F"|" '$2 ~ /AB/{print}' infile

awk 'NF' yourfile.txt

Blank lines might not be empty lines (immediate newline), but have one or more whitespace characters between the beginning of the line and the newline. Does this help?


sed -E '/^[[:space:]]*$/...

There are lots of ways to do this depending on what tools you're using to process the lines that aren't empty. But, for what it looks like you're trying to do with this script, you could use:
grep...

Hi MaindotC,

You have a mix between the selection command /.../ and substitute command s/.../.../

Use:

/^$/ d

Pls post a hexdump/octal dump of your input file so the guessing can be replaced by analysing.

OK. If you really want to get rid of blank lines (lines containing zero or more space and/or tab characters terminated by a newline character) rather than empty lines (lines that only contain the...

For all we know, there could be control characters in the data, in which case none of the solutions provided will work.

RudiC has given the best advice yet.

Regards,
Alister

@MaintdotC
Yet again, please post what Operating System and version you are running. This really matters - expecially if it happens to be MACOS or Cygwin.

Please post sample input...

#!/usr/bin/awk -f

#firstly bring in this systems group entries
BEGIN {
FS=OFS=":"
cmd="getent group"
while ((cmd | getline) > 0) {
...

while read i
do
if id $i > /dev/null 2>&1
then
USER_LDAP_GROUPS="`id $i | cut -d\= -f4 | sed 's/([^()]*)//g;s/,/ /g'`"
echo $USER_LDAP_GROUPS
else
echo "Invalid user $i"
...

Just another sed statement if your whole file is formatted the same way than in your example :

sed 'N;N;s/\n/ /g' yourfile

This is easy to explain:

/:[0-9][0-9]$/N

This is saying apply the command (which is "N") to all lines of the form: a ":" followed by two digits at lines end. "N" combines a line with the...

$ paste - - - < infile
USER_ID 12/31/69 19:00:00 12/31/69 19:00:00
USER_ID 12/31/69 19:00:00 12/31/69 19:00:00
USER_ID 12/31/69 19:00:00 12/31/69 19:00:00
USER_ID 12/31/69...

It looks like you can put the address into the email yourself and let sendmail pull them back out:

Man Page for sendmail (OpenSolaris Section 1m) - The UNIX and Linux Forums...

try
%s/ /\\r/g

Have you tried using /usr/xpg4/bin/vi instead?

The action you describe is what I would have expected actually. You need to enter a control character so press CTRL-V which allows entry of a control character, then press enter like this:

:%s/...

Try this...

grep -vf dont_touch_list master_list > master_touch_list

--ahamed

You can probably use the join utility to do what you want to do.

For example, if do-not-touch file contains:

a
b
c

and master-list file contains:

a
b
c
d
e
f

Assuming the files...

Check grep mail /etc/syslog.conf

Since you are testing return you need to remove the grep process when greping :)

For instance, i will grep for nonexisting process

$ ps ax | grep mpd2 || echo "No MPD2 running"
29221 pts/6 ...