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ls -l --time-style +"%b %d %Y"
total 16
drwxr-xr-x 2 root root 4096 Apr 15 2008 pluginconf.d
-rw-r--r-- 1 root root 386 Jan 10 2007 yum-updatesd.conf

$? is the status returned from previous command.
In case of '0' (success) it does nothing.
In any other case, it echoes "error try again" and waits for user input to be read into the 'an'...

Hi, if I understood wel what you asked, here's an example:

# aaa=123
# BBB=aaa
# echo ${BBB}
aaa
# echo ${!BBB}
123

# cat aaa
aabbccddDDCCDDCCaabbcc 123
CCaaCCBBCCaaaaaaaCCCaa 234
CCDDCCAACCCCccccccccaa 999

# for i in `cut -f1 aaa -d ' '`; do echo -n "$i "; echo -n $i | sed 's/[^a-z]//g' | wc -c; done...

Of course it skipped the first line - you wrote it was supposed to be:
Num Name ID Place ADDR City Country

If you want to apply the rule to all line, ignore the condition that refers to the first...

to prevent double pipe at the end:

sed 's/\([^|]\)$/\1|/' abc.txt

# cat aaa
Num Name ID Place ADDR City Country
1024|Name1|ID1|Street1|ADDR1|Boston|UK
1025|Name2|ID3|Street2|ADDR2|London|USA

# awk 'FS=OFS="|" {if (NR == 1) print $0; else print...

:b:
a little improve:

# sed '$s/,//' aaa
01473341234,
01473312121,
13131231233,
31233444555

a little complicated, but think it will do:

len=`cat aaa|wc -l`; sed -n "1,$[${len}-1]p" aaa; tail -1 aaa |tr -d ','


run example:

# cat aaa
01473341234,
01473312121,
13131231233,...

You're right, but as you see the requested field has space within it, so you need $3. :)

# echo "[Alarm Severity]: MINOR" | awk '/\[Alarm Severity\]:/{print $2}'
Severity]:
# echo "[Alarm...

Works for me:

# cat > xxx
USA45V1\tG\t341029
USAV1T1\tG\t450545
USAREJ1\tG\t572645
USAIX11\tG\t705650
#
#
# sed 's/[\\t]/\t/g' xxx
USA45V1 G 341029
USAV1T1 G...

Thanks
sorry for the bump:o

sed 's/[\\t]/\t/g'

anyone knows something about the $LN ?

Hi
oops, didn't notice that.
See danmero's answer - put the line number at the end followed by '|'.

how to append the numbers?
what is the expected result?

Hi "awk", Thanks and sorry for not clarifying enough.

The line is part of a running and working bash script on Linux.
PID is a local variable and the awk line is using its value to print the...

grep -E '^\"[[:digit:]]{10}\"$'


example:

# cat aaa | grep -E '^\"[[:digit:]]{10}\"$'
"1111111111"
"2222222222"
"4444232344"
# cat >bbb
"1111111111"
"2222222222"
"4444232d33"...

For the following code:

ps auwx | awk -v "PID=${PID}" '$2 == PID {print $LN}'


Two points to clarify:
1. Is the -v flag for declaring we're going to work with a variable?
2. Does the $LN...

awk '/\[Alarm Severity\]:/ {print $3}' file

to put value in a different file, just redirect:

awk '/\[Alarm Severity\]:/ {print $3}' file > newfile

Hi,

Should be a difference between '[[:space:]][[:space:]]*' and '[[:space:]]+' ?

I use them in bash with sed and grep.

Thanks

Won't write the whole script for you.
Re the comment out, you can use:

sed 's/\(.*upsrk@gmail.com.*\)/#\1/' filename

To check if file exist you can use if [ -f "${FILENAME}" ] .

#!/bin/bash
...
PROG=$(which --skip-alias --skip-functions $0 2>/dev/null)
if [ "$PROG" = "" ]; then
DIR=$(dirname $0)
else
DIR=$(dirname ${PROG})
fi
export...

local RET_ARR=("Object is not mapped" "Operation Internal Error" "Operation Invalid Arguments" "Object is mapped" "Path not found")
...
echo "bla bla.. ret is [${RET}] - ${RET_ARR[${RET}]}"

yes, that's the obvious way.. I preferred mine.
But still wonder if there's some better way