Commands using echo (1,545)
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Disable randomisation address Show Sample Output
-1echo 0 > /proc/sys/kernel/randomize_va_space -
Tail all logs that are opened by all java processes. This is helpful when you are on a new environment and you do not know where the logs are located. Instead of java you can put any process name. This command does work only for Linux. The list of all log files opened by java process:
sudo ls -l $(eval echo "/proc/{$(echo $(pgrep java)|sed 's/ /,/')}/fd/")|grep log|sed 's/[^/]* //g'-1sudo ls -l $(eval echo "/proc/{$(echo $(pgrep java)|sed 's/ /,/')}/fd/")|grep log|sed 's/[^/]* //g'|xargs -r tail -f -
-1echo -e "12 morning\n15 afternoon\n24 evening" | awk '{if ('`date +%H`' < $1) print "Good " $2}'
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urls.txt should have a fully qualified url on each line prefix with
rm log.txt;to clear the log change curl command tocurl --head $file | head -1 >> log.txtto just get the http status Show Sample Output-1for file in `cat urls.txt`; do echo -n "$file " >> log.txt; curl --head $file >> log.txt ; done -
Uses the Wunderground web API to get weather data. Change the STA variable to a station near you. Show Sample Output
-1STA=KILCHICA30 PAG=http://api.wunderground.com/weatherstation/WXCurrentObXML.asp?ID=${STA} D=($(curl -s $PAG | sed -n 's/.*<\(temp_f\|wind_dir\|wind_mph\)>\(.*\)<\/.*/\2/p')) echo ${D[1]}@${D[2]}mph ${D[0]}F -
Change the value of p to match the path where you wish to create the profile. To run it again in the future, use the parameter --user-data-dir (which gets echoed to you when run): chromium-browser --user-data-dir=/path/to/your/ Quick Functions: # create a new chromium profile new-chromium-profile() { p=~/.config/chromium/$1; cp -r ~/.config/chromium/Default $p && echo "chromium-browser --user-data-dir=$p" && chromium-browser --user-data-dir=$p; } # runs a chromium profile run-chromium-profile() { chromium-browser --user-data-dir=~/.config/chromium/$1; } Show Sample Output
-1p=~/.config/chromium/zed; cp -r ~/.config/chromium/Default $p && echo "chromium-browser --user-data-dir=$p" && chromium-browser --user-data-dir=$p; -
So your boss wants to know how much memory has been assigned to each virtual machine running on your server... here's how to nab that information from the command line while logged in to that server Show Sample Output
-1for file in $( vmrun list | grep 'vmx$' | sort ); do printf "% 40s %s M\n" $(echo "$( echo -n ${file}:\ ; grep memsize $file )" | sed -e 's/.*\///' -e 's/"//g' -e 's/memsize.=//'); done; -
(Changed to "bartonskis" suggestion.)
-1flipf(){ if [ -f "$1" -a -f "$2" ]; then mv "$1" "$1.$$" && mv "$2" "$1" && mv "$1.$$" "$2" || echo "$!"; else echo "Missing a file: $!"; fi; } -
This function is used to set environmental variables from a list of alternatives depending on what's installed on the system. It returns the first program found in the list. Example usage:
export BROWSER=$(find_alternatives chromium-browser google-chrome opera firefox firefox-bin iceweasel konqueror w3m lynx).export EDITOR=$(find_alternatives vim nano pico emacs kate).export PAGER=$(find_alternatives vimpager less most more pg)-1find_alternatives(){ for i;do which "$i" >/dev/null && { echo "$i"; return 0;};done;return 1;} -
Numbers are less understandable then words. Also this may put out a different result.
-1echo "Terrorist threat level: `sed $(perl -e "print int rand(99999)")"q;d" /usr/share/dict/words`" -
This will tighten up security for your box. The default value for PermitRootLogin sadly is 'yes'.
-1s=/etc/ssh/sshd_config;r=PermitRootLogin;cp $s{,.old}&& if grep $r $s;then sed "s/$r yes/$r no/" $s.old > $s; else echo $r no >> $s;fi -
-1echo | socat -u - file:/tmp/swapfile,create,largefile,seek=10000000000000
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-1getarray(){ a=$1;b="${a[$2]}";eval "c=$b";echo "${c[$3]}";return 0;};a[0]="( a b c )";a[1]="( d e f )";getarray a 1 2
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-1echo $((1+2+3+4))
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-1echo -n "String to get MD5" | md5sum | sed "s/ -//"
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-1echo -n "String to MD5" | md5sum | awk '{print $1}'
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a pretty simple script when running java programs from command line Show Sample Output
-1CLASSPATH=.; export CLASSPATH=$CLASSPATH$(find "$PWD" -name '*.jar' -type f -printf ':%p\n' | sort -u | tr -d '\n'); echo $CLASSPATH -
(1) don't run twice, or the same folder will occur in $PATH. (2) otherwise you need to start a new terminal Show Sample Output
-1export PATH=$PATH$(find "$PWD" -name '.*' -prune -o -type f -a -perm /u+x -printf ':%h\n' | sort -u | tr -d '\n'); echo $PATH -
Here's a bash version using an array.
-1a=(*); echo ${a[$((RANDOM % ${#a[@]}))]} -
Warn: use convmv or detox if you can: they are the right tools. But if you want to do it manually, you can use this command to find the problematic files and transliterate their accented characters to their ascii equivalent. (Useful when doing cd backup: growisofs may fail on files which come from the old iso8859-* days.)
-1LANG=fr_FR.iso8859-1 find . -name '*['$'\xe9'$'\xea'$'\xeb'$'\xc9'']*'|while read f; do a="$(echo $f|iconv -f iso8859-1 -t ascii//TRANSLIT)"; echo "move $f => $a"; done -
This command are using by me for checking connection with Internet. Show Sample Output
-1while true; do /bin/ping -q -c1 -w3 8.8.8.8 2>&1 > /dev/null || echo "8.8.8.8 ping failed at $(date +%d/%m/%y) $(date +%H:%M:%S)" >> /var/log/ping.log; sleep 10; done & -
-1echo $(( $( date +%s ) - $( stat -c %Y * | sort -nr | head -n 1 ) ))
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urldecode files in current directrory
-1ls * | while read fin;do fout=$(echo -n $fin | sed -e's/%\([0-9A-F][0-9A-F]\)/\\\\\x\1/g' | xargs echo -e);if [ "$fout" != "$fin" ];then echo "mv '$fin' '$fout'";fi;done | bash -x -
It's very similar to this thread: http://www.commandlinefu.com/commands/view/4317/send-a-local-file-via-email
mutt your@email_address.com -s "Message Subject Here" -a attachment.jpg </dev/null-1M=bob@example.com; echo "Email message" | mutt -s "Email Subject" $M -
-1while true; do date; ssh <YOUR HOST HERE> "echo" && echo "HOST UP" && break; sleep 60; done
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