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sed -i 's/[ |\t]\+/,/g' input-file

---------- Post updated at 06:32 AM ---------- Previous update was at 06:28 AM ----------

But I see from your example that you want single spaces to not be...

Use the following: first check for the existence of the key in the known_hosts file and if it is there then run ssh with publickey as the only authentication option:
if grep "$host"...

Use this, assuming you don't have any other iptables configuration:
iptables -A FORWARD -i eth1 -o eth0 -m mac --mac-source aa:aa:aa:aa:aa:aa -j ACCEPTFor the list of MAC addresses, assuming these...

This line will generate the output you want:
awk -F "'" '{for (i=2;i<=NF;i+=2) {printf $i" "}; print ""}' file_with_text

Check whether the UserDir directive points to the correct path or not and whether the user is allowed to have an UserDir directory or not.

You shouldn't use "-i" as parameter to sudo, because this flag instructs sudo to run the command as a login shell like this:
/bin/bash -c /bin/kill 1234instead of
/bin/kill 1234 and you only gave...

It seems that in Mac OS, when sed is used with -i, the backup extension is required, not optional, so we'll use an empty string for that in order to ingore backups. Change the sed line to:
sed -i ''...

I don't have a Mac OS sed to test it with, but you could try it by changing the sed line to:
sed -i "s/^/${i} ${j} /g" height_${i}_width_${j}.txt

Instead of `seq ` $max_i` you could use {1..3} (if you are using the bash shell). The only downside is that you have to use the actual value as the max value and not a variable.

Alternatively, you...

It's odd that /proc takes any disk space at all.

Anyway, your best choice would be to check the /var/log directory and archive and move old log files from there and also check the /root directory...

Use this command:
sort -n -k 1 -k 2 space_delimited_text_file

You can use this command:
ps --no-headers -eo "%p %C %U %c %a" | sort -r -n -k 2 | awk '{if ($2 > 5.0) {print $0}}' > output-fileThis command outputs the PID, CPU usage, user owning the process,...

This bash script will do it for you:

#!/bin/bash

max_i=4
max_j=4

for i in `seq 1 $max_i`; do
for j in `seq 1 $max_j`; do
if [ -f height_${i}_width_${j}.txt ]; then...

If you have your log files names following a pattern (for example they all are ending in .log), then you can use this command:


tar zcf DB_Folder.tar.gz DB_Folder/ --exclude=*.log
If you cannot...

This one will do the job as well (assuming all the lines start with "Sample "):


sed "s|^Sample \(.*\)|Sample $(date +%m/%d/%Y) \1|g" a.txt > b.txt

Doesn't work with values greater than 10 though. If only sed supported if statements ...

I think that by running the script some of your files got replaced. For example, chp01_00001.wav is renamed to chp_bloomy_00001.wav, and chp02_00001.wav is renamed to chp_bloomy_00001.wav too.

However if the values are not unique and not sorted, you can use the following:


echo "ABC 1
ABC 2
ABC 3
ABC 4
ABC 5" | awk '{if ($2 <= 3) {print "#"$0} else {print $0}}'


Works as well...