Commands using awk (1,418)
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... plus do a sort according frequency Show Sample Output
11find . -type f | awk -F'.' '{print $NF}' | sort| uniq -c | sort -g -
seq -s ' ' 1 9 | sed -n ':a;p;s/ *\w$//;h;/^$/t;b a;q' | tac | awk '{for(i=1;i 1x1=1 1x2=2 2x2=4 1x3=3 2x3=6 3x3=9 1x4=4 2x4=8 3x4=12 4x4=16 1x5=5 2x5=10 3x5=15 4x5=20 5x5=25 1x6=6 2x6=12 3x6=18 4x6=24 5x6=30 6x6=36 1x7=7 2x7=14 3x7=21 4x7=28 5x7=35 6x7=42 7x7=49 1x8=8 2x8=16 3x8=24 4x8=32 5x8=40 6x8=48 7x8=56 8x8=64 1x9=9 2x9=18 3x9=27 4x9=36 5x9=45 6x9=54 7x9=63 8x9=72 9x9=81
11seq 9 | sed 'H;g' | awk -v RS='' '{for(i=1;i<=NF;i++)printf("%dx%d=%d%s", i, NR, i*NR, i==NR?"\n":"\t")}' -
11netstat -ntu|awk '{print $5}'|cut -d: -f1 -s|sort|uniq -c|sort -nk1 -r
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10while true; do X=$Y; sleep 1; Y=$(ifconfig eth0|grep RX\ bytes|awk '{ print $2 }'|cut -d : -f 2); echo "$(( Y-X )) bps"; done
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This is useful if you have need to do port forwarding and your router doesn't assign static IPs, you can add it to a script in a cron job that checks if you IP as recently changed or with a trigger script. This was tested on Mac OSX.
10ifconfig en1 | awk '/inet / {print $2}' | mail -s "hello world" email@email.com -
Show time and date when you installed your OS. Show Sample Output
10ls -lct /etc | tail -1 | awk '{print $6, $7}' -
Just refining last proposal for this check, showing awk power to make more complex math (instead /1024/1024, 2^20). We don't need declare variable before run lsof, because $(command) returns his output. Also, awk can perform filtering by regexp instead to call grep. I changed the 0.0000xxxx messy output, with a more readable form purging all fractional numbers and files less than 1 MB. Show Sample Output
10lsof -p $(pidof firefox) | awk '/.mozilla/ { s = int($7/(2^20)); if(s>0) print (s)" MB -- "$9 | "sort -rn" }' -
man dmidecode [look for type] Show Sample Output
10dmidecode -t 17 | awk -F":" '/Speed/ { print $2 }' -
poorman's ifstat using just sh and awk. You must change "eth0" with your interface's name. Show Sample Output
10while true; do cat /proc/net/dev; sleep 1; done | awk -v dc="date \"+%T\"" '/eth0/{i = $2 - oi; o = $10 - oo; oi = $2; oo = $10; dc|getline d; close(dc); if (a++) printf "%s %8.2f KiB/s in %8.2f KiB/s out\n", d, i/1024, o/1024}' -
10awk '{ $1="";print}'
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This command is useful when you want to know what process is responsible for a certain GUI application and what command you need to issue to launch it in terminal. Show Sample Output
9xprop | awk '/PID/ {print $3}' | xargs ps h -o pid,cmd -
Very useful set of commands to know when your file system was created. Show Sample Output
9df / | awk '{print $1}' | grep dev | xargs tune2fs -l | grep create -
You can use multiple field separators by separating them with | (=or). This may be helpful when you want to split a string by two separators for example. #echo "one=two three" | awk -F "=| " {'print $1, $3'} one three
9awk -F "=| " -
This command checks for the number of times when someone has tried to login to your server and failed. If there are a lot, then that user is being targeted on your system and you might want to make sure that user either has remote logins disabled, or has a strong password, or both. If your output has an "invalid" line, it is a summary of all logins from users that don't exist on your system. Show Sample Output
9zgrep "Failed password" /var/log/auth.log* | awk '{print $9}' | sort | uniq -c | sort -nr | less -
This create an array 'a' with wole lines. only one occurrence of each line - Not Get lines ++ !
9awk '!a[$0]++' file -
Adapted using your usefull comments !
9grep -e `date +%Y-%m-%d` /var/log/dpkg.log | awk '/install / {print $4}' | uniq | xargs apt-get -y remove -
9tail -f file | awk '{now=strftime("%F %T%z\t");sub(/^/, now);print}'
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Booting the VM headless via VBoxHeadless requires knowledge of the VM's network in order to connect. Using VBoxManage in this way and you can SSH to the VM without first looking up the current IP, which changes depending on how you have your VM configured. Show Sample Output
9ssh vm-user@`VBoxManage guestproperty get "vm-name" "/VirtualBox/GuestInfo/Net/0/V4/IP" | awk '{ print $2 }'` -
If your wc does not have the -L option, you can use awk.
9awk '(length > n) {n = length} END {print n}' -
This command uses awk(1) to print all lines between two known line numbers in a file. Useful for seeing output in a log file, where the line numbers are known. The above command will print all lines between, and including, lines 3 and 6.
9awk 'NR >= 3 && NR <= 6' /path/to/file -
9sudo who | awk '!/root/{ cmd="/sbin/pkill -KILL -u " $1; system(cmd)}'
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8svn st | grep "^\?" | awk "{print \$2}" | xargs svn add $1
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8gunzip -c /var/log/auth.log.*.gz | cat - /var/log/auth.log /var/log/auth.log.0 | grep "Invalid user" | awk '{print $8;}' | sort | uniq -c | less
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Searches the /var/log/secure log file for Failed and/or invalid user log in attempts. Show Sample Output
8cat /var/log/secure | grep sshd | grep Failed | sed 's/invalid//' | sed 's/user//' | awk '{print $11}' | sort | uniq -c | sort -n -
Also useful with iostat, or pretty much anything else you want timestamped. Show Sample Output
8vmstat 1 | awk '{now=strftime("%Y-%m-%d %T "); print now $0}' - < 1 2 3 4 5 > Last ›
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