Commands using xargs (769)
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Let's give Flatcap credit for this elegant solution, instead of leaving it hidden as a comment. Tested on RHEL6 and it works. Nice and clean.
1curl -s https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/ | grep -o '[^"]*Linux/7/pdf[^"]*' | xargs -I{} wget https://access.redhat.com{} -
An alternative without aptitude.
1apt-mark showmanual|xargs sudo apt-mark markauto -
1find -L /path/to/check -type l | xargs rm
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for OS X Show Sample Output
1find . | xargs md5 2>/dev/null | awk '{printf("%s %s\n", $4, $2)}' | sort | awk 'BEGIN{md5="";file=""}{if(md5==$1){printf("%s %s\t%s\n", $1, $2, file)}md5=$1;file=$2}' -
You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials Show Sample Output
1head -n1 | xargs -I {} aws sts get-session-token --serial-number $MFA_ID --duration-seconds 900 --token-code {} --output text --query [Credentials.AccessKeyId,Credentials.SecretAccessKey,Credentials.SessionToken] -
Neither of the others worked for me. This does.
1curl http://url/rss | grep -o '<enclosure url="[^"]*' | grep -o '[^"]*$' | xargs wget -c -
1cat matching_files.txt | xargs sed -i '' "s/require('global-module')/require('..\/some-folder\/relative-module')/"
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http://public-dns.info gives a list of online dns servers. you need to change the country in url (br in this url) with your country code. this command need some time to ping all IP in list. Show Sample Output
1curl -s http://public-dns.info/nameserver/br.csv| cut -d, -f1 | xargs -i timeout 1 ping -c1 -w 1 {} | grep time | sed -u "s/.* from \([^:]*\).*time=\([^ ]*\).*/\2\t\1/g" | sort -n | head -n1 -
1pip list --outdated --format=freeze | grep -o "[[:alnum:][:punct:]]\{,\}==" | sed 's#==$##g' | xargs -I '{}' pip install {} --upgrade
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1printf "%x\n" $(seq 0 255) | xargs -n1 -IH echo -ne \\xH > test.dat
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this is good for variables if you have many script created files and if you want to know which one is the last created/changed one..
1find . -type f -print0 | xargs -0 stat -c '%y %n' | sort -n -k 1,1 | awk 'END{print $NF}' -
1find /var/www/ -type f -name '*.[pP][nN][gG]' -print0 | xargs -L 1 -n 1 -P 8 -0 optipng -preserve -quiet -o7 -f4 -strip all
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1find . -regextype posix-egrep -regex '.+\.(c|cpp|h)$' -not -path '*/generated/*' -not -path '*/deploy/*' -print0 | xargs -0 ls -L1d
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Also ignoring "sshd" server is necessary since you should not kill ssh server processes.
1ps aux | grep ssh | grep -v grep | grep -v sshd | awk {'print $2'} | xargs -r kill -9 -
From Gentoo Forum, greetings to rudregues & steveL. Show Sample Output
1qlist -I | xargs qlop -t | awk '{ if ($2 < 5400) secs += $2} END { printf("%dh:%dm:%ds\n", secs / 3600, (secs % 3600) / 60, secs % 60); }' -
1qlist -I | xargs qlop -t |sort -t" " -rnk2
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1npm ls -gp --depth=0 | awk -F/ '/node_modules/ && !/\/npm$/ {print $NF}' | xargs npm -g rm; npm -g uninstall npm
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First the find command finds all files in your current directory (.). This is piped to xargs to be able to run the next shell pipeline in parallel. The xargs -P argument specifies how many processes you want to run in parallel, you can set this higher than your core count as the duration reading is mainly IO bound. The -print0 and -0 arguments of find and xargs respectively are used to easily handle files with spaces or other special characters. A subshell is executed by xargs to have a shell pipeline for each file that is found by find. This pipeline extracts the duration and converts it to a format easily parsed by awk. ffmpeg reads the file and prints a lot of information about it, grep extracts the duration line. cut and sed cut out the time information, and tr converts the last . to a : to make it easier to split by awk. awk is a specialized programming language for use in shell scripts. Here we use it to split the time elements in 4 variables and add them up. Show Sample Output
1find . -print0 | xargs -0 -P 40 -n 1 sh -c 'ffmpeg -i "$1" 2>&1 | grep "Duration:" | cut -d " " -f 4 | sed "s/.$//" | tr "." ":"' - | awk -F ':' '{ sum1+=$1; sum2+=$2; sum3+=$3; sum4+=$4 } END { printf "%.0f:%.0f:%.0f.%.0f\n", sum1, sum2, sum3, sum4 }' -
Useful to see at glance which directory under the root file is using most space Show Sample Output
1find / -maxdepth 1 -type d | xargs -I {} sh -c "mountpoint -q {} || du -sk {}" | sort -n -
1git remote -v |grep origin|tail -1|awk '{print $2}'|cut -d"@" -f2|sed 's/:/\//g'|xargs -I {} open -a "Google Chrome" https://{}
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Sometimes we install programs, we forget about them, and they stay there wasting RAM. This one-liner try to find them. Show Sample Output
1ps -eo cmd | awk '{print $1}'| sort -u | grep "^/" | xargs dpkg -S 2>/dev/null | awk -F: '{print $1}' | sort -u | xargs apt-mark showmanual -
This script finds all git objects and `git cat-file`'s their content. This is really just a helper function to play around with the internals of git repositories. See https://git-scm.com/book/en/v2/Git-Internals-Git-Objects of more info. Show Sample Output
1find .git/objects/ -type f \| sed 's/\.git\/objects\/\///' | sed 's/\///g' | xargs -n1 -I% echo echo "%" \$\(git cat-file -p "%"\) \0 | xargs -n1 -0 sh -c -
1ls /var/log/* -ld | tr -s " " | cut -d" " -f9 | xargs -i{} sh -c 'echo "\n---{}---\n"; tail -n50 {}/`ls -tr {} | tail -n1`'
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Directly download all mp3 files of the desired podcast
1curl http://radiofrance-podcast.net/podcast09/rss_14726.xml | grep -Eo "(http|https)://[a-zA-Z0-9./?=_%:-]*mp3" | sort -u | xargs wget -
1xargs -I% -P10 curl -sL "https://iconfig.co" < <(printf '%s\n' {1..10})
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