Commands tagged awk sorted by votes

Commands tagged awk (348)

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Sum up total size and count of all certain filename pattern/regex
This is sample output - yours may be different.
-1

find -regextype posix-egrep -regex ".*/[A-Z]{3}_201009[0-9]{2}.*" -printf "%f %s\n" | awk '{ SUM += $2;COUNT++ } END { print SUM/1024 " kb in " COUNT " files" }'

taintedkernel · 2010-09-21 15:41:45 3
AWK: Set Field Separator from command line

Set field separator char from command line. Prints first, second and lsat columns. Show Sample Output
This is sample output - yours may be different.
```
Input:
Col1,Col2,Col3,[...],ColLast

Output:
Col1 Col2 ColLast
```
-1

awk 'BEGIN {FS=","} { print $1 " " $2 " " $NF}' foo.txt

EBAH · 2010-11-12 15:26:04 4

remove all carriage return of a given file (or input, if used with | ) and replace them with a space (or whatever character is after %s) Show Sample Output

-1

awk ' { printf ("%s ", $0)} END {printf ("\n") } ' FILE

bouktin · 2011-02-02 11:51:41 6

pid list by httpd listen port

% lsof -v lsof version information: revision: 4.78
This is sample output - yours may be different.
-1

lsof | awk '/*:https?/{print $2}' | sort -u

sugitaro · 2011-02-04 01:37:17 3
easily strace all your apache processes
This is sample output - yours may be different.
-1

ps -C apache o pid= | sed 's/^/-p /' | xargs strace

depesz · 2011-03-15 08:46:33 3
Remove all unused kernels with apt-get

Same as 7272 but that one was too dangerous so i added -P to prompt users to continue or cancel Note the double space: "...^ii␣␣linux-image-2..." Like 5813, but fixes two bugs: [1]This leaves the meta-packages 'linux-headers-generic' and 'linux-image-generic' alone so that automatic upgrades work correctly in the future. [2]Kernels newer than the currently running one are left alone (this can happen if you didn't reboot after installing a new kernel).
This is sample output - yours may be different.
-1

sudo aptitude remove -P $(dpkg -l|awk '/^ii linux-image-2/{print $2}'|sed 's/linux-image-//'|awk -v v=`uname -r` 'v>$0'|sed 's/-generic//'|awk '{printf("linux-headers-%s\nlinux-headers-%s-generic\nlinux-image-%s-generic\n",$0,$0,$0)}')

Bonster · 2011-04-25 05:19:57 3
Show seconds since modified of newest modified file in directory
This is sample output - yours may be different.
-1

echo $(( $( date +%s ) - $( stat -c %Y * | sort -nr | head -n 1 ) ))

depesz · 2011-05-12 14:29:45 3
Time redis ping in thousands of a second.

Outputs the real time it takes a Redis ping to run in thousands of a second without any proceeding 0's. Useful for logging or scripted action.
This is sample output - yours may be different.
-1

TIME=$( { time redis-cli PING; } 2>&1 ) ; echo $TIME | awk '{print $3}' | sed 's/0m//; s/\.//; s/s//; s/^0.[^[1-9]*//g;'

allrightname · 2011-08-11 19:09:49 4
Generate an XKCD #936 style 4 word password

If you do not have shuf or an -R option in sort, you can fall back on awk. This provides maximum portability IMO. The command first collects words from the dictionary that match the criteria - in this case: lower case words with no punctuation that are 4 to 8 characters long. It then prints 4 random entries. I decided to print each word on a separate line to improve readability.
This is sample output - yours may be different.
-1

awk 'BEGIN {srand} /^[a-z]{4,8}$/ {w[i++]=$0} END {while (j++<4) print w[int(rand*i)]}' /usr/share/dict/words

putnamhill · 2011-08-18 02:09:42 3
speak a chat log file while it's running

like #9295, but awkish instead of perlish
This is sample output - yours may be different.
-1

tail -f LOGFILE | awk '{system("say \"" $0 "\"");}'

tamouse · 2011-09-16 06:20:06 9
Sequential revision numbers in Git

Git uses secure hash sums for its revision numbers. I'm sure this is fine and dandy for ultra-secure computing, but it's less than optimal for humans. Thus, this will give you sequential revision numbers in Git all the way from the first commit.
This is sample output - yours may be different.
-1

git rev-list --reverse HEAD | awk "/$(git log -n 1 --pretty="format:%h")/ {print NR}"

atoponce · 2011-11-15 21:49:32 4
Print the local ip on a wireless connection

On wired connections set 'eth0' instead of 'wlan0'
This is sample output - yours may be different.
-1

sudo ifconfig wlan0 | grep inet | awk 'NR==1 {print $2}' | cut -c 6-

mouths · 2013-02-18 14:10:07 8
Useful to check if the disks as of same size or not. Helpful in checking Raid configs
This is sample output - yours may be different.
-1

df | awk '{if ($2!=dspace) print "different"; dspace=$2;}'

adimania · 2013-03-08 12:09:35 14
print nearest multiples of 100 in a file
This is sample output - yours may be different.
-1

awk 'BEGIN {count=0;prev=-1} {if(count>0) { if(int($1/100) > int(prev/100)) {print $1} } ; prev=$1; count++}' inputFile > rounded

user1234 · 2013-10-05 18:30:08 7
Print starting line numbers of group of lines in a file, which have the same first and second column
This is sample output - yours may be different.
-1

awk '{pattern=$1$2; seen[pattern]++; if (seen[pattern] == 1) print NR}' inputFile

user1234 · 2013-10-05 18:51:50 15
Remove duplicate lines using awk
This is sample output - yours may be different.
-1

!a[$0]++

Dawn_of_the_Dead · 2014-03-16 01:50:30 6
display IP addresses with 5 or more unsuccessful login attempts today

display IP's that unsuccessfully attempted to login 5 or more times today may want to filter any trusted IP's and the localhost useful for obtaining a list IP addresses to block on the firewall Show Sample Output
This is sample output - yours may be different.
```
the output is zero or more IP addresses
```
-1

lastb -i | grep "$(date '+%a %b %d')" | awk '{ print $3 }' | sort | uniq -c | awk '{ if ($1 >= 5) print $2; }'

forestb · 2015-11-20 07:19:20 10
Checking total connections to each Ip inserver

Useful to check DDoS attacks on servers. Show Sample Output
This is sample output - yours may be different.
```
1 127.0.0.1
 8 192.168.1.147
 21 192.168.1.146
```
-2

netstat -alpn | grep :80 | awk '{print $4}' |awk -F: '{print $(NF-1)}' |sort | uniq -c | sort -n

nitins · 2009-02-19 04:59:32 9
count how many times a string appears in a (source code) tree

grep's -c outputs how may matches there are for a given file as "file:N", cut takes the N's and awk does the sum. Show Sample Output
This is sample output - yours may be different.
```
34
```
-2

grep -rc logged_in app/ | cut -d : -f 2 | awk '{sum+=$1} END {print sum}'

terceiro · 2009-07-15 14:16:44 9
List path of binaries
This is sample output - yours may be different.
-2

echo $PATH|awk -F: ' { for (i=1; i <= NF; i++) print $i }'

nitins · 2009-08-12 07:56:56 4
Show directories in the PATH, one per line

Removes trailing newline; colon becomes record separator and newline becomes field separator, only the first field is ever printed. Replaces empty entries with $PWD. Also prepend relative directories (like ".") with the current directory ($PWD). Can change PWD with env(1) to get tricky in (non-Bourne) scripts. Show Sample Output
This is sample output - yours may be different.
```
/tmp/src
/tmp
/usr/java/jdk1.6.0_11/bin
/home/arcege/local/bin
/home/arcege/bin
/usr/local/sbin
/usr/local/bin
/usr/sbin
/usr/bin
/sbin
/bin
/usr/games
/opt/real/RealPlayer
/tmp/.
/usr/java/apache-ant-1.7.0/bin
```
-2

echo src::${PATH} | awk 'BEGIN{pwd=ENVIRON["PWD"];RS=":";FS="\n"}!$1{$1=pwd}$1!~/^\//{$1=pwd"/"$1}{print $1}'

arcege · 2009-09-09 04:03:46 3
Delete all but the latest 5 files

I have a directory containing log files. This command delete all but the 5 latest logs. Here is how it works: * The ls -t command list all files with the latest ones at the top * The awk's expression means: for those lines greater than 5, delete.
This is sample output - yours may be different.
-2

ls -t | awk 'NR>5 {system("rm \"" $0 "\"")}'

haivu · 2009-09-16 04:58:08 4
Checks apache's access_log file, strips the search queries and shoves them up your e-mail

It's not a big line, and it *may not* work for everybody, I guess it depends on the detail of access_log configuration in your httpd.conf. I use it as a prerotate command for logrotate in httpd section so it executes before access_log rotation, everyday at midnight.
This is sample output - yours may be different.
-2

cat /var/log/httpd/access_log | grep q= | awk '{print $11}' | awk -F 'q=' '{print $2}' | sed 's/+/ /g;s/%22/"/g;s/q=//' | cut -d "&" -f 1 | mail youremail@isp.com -s "[your-site] search strings for `date`"

isma · 2009-11-22 03:03:06 8
Find all uses of PHP constants in a set of files
This is sample output - yours may be different.
-2

$class=ExampleClass; $path=src; for constant in `grep ' const ' $class.php | awk '{print $2;}'`; do grep -r "$class::$constant" $path; done

BluesDragon · 2009-12-24 11:32:24 4
Purge frozen messages in Exim

Although Exim will purge frozen (undeliverable) messages over time, the command "exim -Mrm #id#" where #id# is a particular message ID will purge a message immediately. Being lazy, I don't want to type the command for each frozen message, so I wrote the one-liner to do it for me.
This is sample output - yours may be different.
-2

for i in `mailq | awk '$6 ~ /^frozen$/ {print $3}'`; do exim -Mrm $i; done

rjamestaylor · 2010-01-13 21:28:45 3
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Unbelievable Shell Colors, Shading, Backgrounds, Effects for Non-X

I've been using linux for almost a decade and only recently discovered that most terminals like putty, xterm, xfree86, vt100, etc., support hundreds of shades of colors, backgrounds and text/terminal effects. This simply prints out a ton of them, the output is pretty amazing. If you use non-x terminals all the time like I do, it can really be helpful to know how to tweak colors and terminal capabilities. Like: $ echo $'\33[H\33[2J'

Get all ip address for the host

append empty line after every line in file.txt

Run a file system check on your next boot.

The empty file /forcefsck causes the file system check fsck to be run next time you boot up, after which it will be removed. This works too: $sudo >/forcefsck

Recursively move folders/files and preserve their permissions and ownership perfectly

Quickly graph a list of numbers

Useful when you've produced a large file of numbers, and want to quickly see the distribution. The value of y halfway along the x axis is the median. Simple! Just create the listOfNumbers.txt file with a number on each line to try it out.

Remove Thumbs.db files from folders

An alternative which uses the advanced zsh globbing (pattern matching)

find and delete empty directories recursively

this will show the names of the deleted directories, and will delete directories that only no files, only empty directories.

Shows the torrent file name along with the trackers url

Replace * with any filename matching glob or an individual filename

cpu stress test

For each cpu set mask and then monitor your cpu infos. Temp,load avg. etc. For example for 2nd cpu or 2nd core taskset 0x00000002 yes > /dev/null & For example for 3rd cpu or 3rd core taskset 0x00000004 yes > /dev/null & For example for 4th cpu or 4th core taskset 0x00000008 yes > /dev/null & Monitor your cpu temp with this command if you want watch -n1 "acpi -t" Load avg. from top command top kerim@bayner.com http://www.bayner.com/

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Commands tagged awk (348)

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