Commands using read (340)
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0lsof -p `pidof pidgin` | awk '{ print $9 }'|egrep `hostname` | grep -o ">[^:]\+:" | tr -d ":>" | while read line; do host $line; done;
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Given a file with the format of 'git log --pretty=short', search in last 100 commits for one with the same description. I used this when after a rebase I had to find out the new commit ids. The second sed replaces all special characters with dots so they don't mess up the grep later on. Show Sample Output
0cat /tmp/commit_list | { while read old_commit ; do msg="`git log --pretty=oneline $old_commit'^'..$old_commit | sed 's/[0-9a-f]* //' | sed 's/[^A-Za-z0-9]/./g'`"; git log --pretty=oneline HEAD@'{100}'..HEAD | grep "$msg" ; done ; } -
0tail -f /var/log/messages.log | while read line ; do echo $line | cut -d \ -f5- | sed s/\\[[0-9]*\\]// | espeak ; done
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A lot of files in one dir is not so cool for filesystem.
0find . -type d | while read dir ; do num=`ls -l $dir | grep '^-' | wc -l` ; echo "$num $dir" ; done | sort -rnk1 | head -
0find . | while read line; do test `stat -c %u $line` -eq 1003 && chown android:android $line && echo $line; done
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Simply add this to whatever apache startup script you have, or if you are on a MAC, create a new automator application. This will show a pretty growl notification whenever theres a new Apache error log entry. Useful for local development
0/usr/bin/tail -fn0 /path/to/apache_error.log | while read line; do /usr/local/bin/growlnotify --title "Apache Notice" --message "$line"; done & -
make a bunch of files with the same permissions, owner, group, and content as a template file (handy if you have much to do w. .php, .html files or alike)
0echo "template file: ";read tpl;echo "new file(s separated w. space):"; read fl;touch $fl;find $fl -exec cp -ap $tpl "{}" \; -
This exports all lines of input file as environment variables, assuming each line is like these: OH=YEAH FU=UUUU
0while read line; do export $line; done < <(cat input) -
0ps -o rss= -C Chrome | (x=0; while read rss; do ((x+=$rss)); done; echo $((x/1024)))
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git gc should be run on all git repositories every 100 commits. This will help do do so if you have many git repositories ;-)
0find . -name .git -print0 | while read -d $'\0' g; do echo "$g"; cd "$g"; git gc --aggressive; cd -; done -
0cat domainlist.txt | while read line; do echo -ne $line; whois $line | grep Expiration ; done | sed 's:Expiration Date::'
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0svn st | grep ! | cut -c 9- | while read line;do svn resolved $line;done
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This will strip out the relivent disk information from kvm. I'm using it to find disks on a SAN which are no longer in use. Show Sample Output
0while read X ; do printf "$X --"; virsh dumpxml $X | egrep "source dev|source file"; done< <(virsh list | awk '$1 ~ /^[1-9]/ { print $2 }') -
This command is used to verify a sha256sum-formatted file hash list on IBM AIX or any other UNIX-like OS that has openssl but doesn't have sha256sum by default. Steps: 1: Save to the filesystem a script that: A: Receives as arguments the two parts of one line of a sha256sum listing B: Feeds a file into openssl on SHA256 standard input hash calculation mode, and saves the result C: Compares the calculated hash against the one received as argument D: Outputs the result in a sha256sum-like format 2: Make the script runnable 3: Feed the sha256sum listing to xargs, running the aforementioned script and passing 2 arguments at a time Show Sample Output
0echo '#! /usr/bin/ksh\ncat $2 | openssl dgst -sha256 | read hashish; if [[ $hashish = $1 ]]; then echo $2: OK; else echo $2: FAILED; fi;' > shacheck; chmod +x shacheck; cat hashishes.sha256 | xargs -n 2 ./shacheck; -
Find's all png's in the current folder and all of its children pngcrushes all results. Destructive.
0find -f . png | while read line; do pngcrush -ow -brute $line; done -
0find .git/objects -type f -printf "%P\n" | sed s,/,, | while read object; do echo "=== $obj $(git cat-file -t $object) ==="; git cat-file -p $object; done
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Lost your luks passphrase? You can always bruteforce from the command line. See the sample output, a simple command using a dictionary. Show Sample Output
0cat dictionary.txt|while read a; do echo $a|cryptsetup luksOpen /dev/sda5 sda5 $a && echo KEY FOUND: $a; done -
Sometimes I get FLAC files that RhythmBox can't play but VLC can. So I re-encode them using GStreamer at highest compression.
0find . -type f -iname '*.flac' | while read i; do mv -- "$i" "$i.tmp"; gst-launch filesrc location="$i.tmp" ! flacdec ! flacenc quality=8 ! filesink location="${i%.tmp}"; rm -- "$i.tmp"; done -
Replace "APIKEY" with your public apikey Show Sample Output
0cat h.txt| while read line; do curl -s -X POST 'https://www.virustotal.com/vtapi/v2/file/report' --form apikey="APIKEY" --form resource="$line"|awk -F'positives\":' '{print "VTHits"$2}'|awk -F' ' '{print $1" "$2$5$6}'|sed 's/["}]//g' && sleep 15; done -
Usage:
command | hl 'regex'0hl() { while read -r; do printf '%s\n' "$(perl -p -e 's/('"$1"')/\a\e[7m$1\e[0m/g' <<< "$REPLY")"; done; } -
0netstat -nr|egrep -v "Routing|Interface|lo0"|awk '{print $5}'|sort -u| while read l; do ifconfig $l ; echo " Station Addr: `lanscan -ia|grep "$l "|cut -d ' ' -f 1`" ; done
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This command takes all `.po` files inside `i18n` directory and compiles them to `.mo` files with same basename
0find ./i18n -name "*.po" | while read f; do msgfmt $f -o ${f%.po}.mo; done -
rename all dirs with "?" char in name, leave spaces and () in place Show Sample Output
0find . -type d -name "*\?*" | while read f;do mv "$f" "${f//[^0-9A-Za-z.\/\(\)\ ]/_}";done -
Given a list of filenames, one per line, in /tmp/filelist, calculate the total sum disk usage.
0LISTCOUNT=0; LISTSIZE=0; cat /tmp/filelist | while read FF; do FILESIZE=$(stat -c%s "$FF"); LISTSIZE=$[LISTSIZE+${FILESIZE}]; echo listsize: $LISTSIZE; LISTCOUNT=$[LISTCOUNT+1]; echo listcount: $LISTCOUNT; done | tail -2 -
This helps me determine which repo I want to use for downloading ISO files Show Sample Output
0cat repos.txt | while read line; do echo $line | cut -d"/" -f 3 | fping -e ;done - ‹ First < 8 9 10 11 12 > Last ›
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