Commands using echo (1,545)
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Additionally you cal also print the current directory in the end. cdb(){ range=$(eval "echo '{1..$1}'"); toPrint="'../%.0s' $range"; printfToEval=$(echo "printf $toPrint"); toCd=$(eval $printfToEval); eval "cd $toCd"; pwd; } Show Sample Output
0cdb(){ range=$(eval "echo '{1..$1}'"); toPrint="'../%.0s' $range"; printfToEval=$(echo "printf $toPrint"); toCd=$(eval $printfToEval); eval "cd $toCd"; } -
Command will succeed n% of the time. ran 75 will cause command to succeed 75% of the time. No argument will cause it to succeed 50% of the time. Show Sample Output
0ran() { R=$((RANDOM%100)); if [ $R -gt "${1:-50}" ]; then echo FALSE; false; else echo TRUE; true; fi; } -
0echo "text to prepend" | cat - file
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Shows the WiFi signal strength without having to display thousands of lines Show Sample Output
0while i=1; do echo -ne 'Wifi signal strength:' $(/System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -I | grep CtlRSSI | awk {'print $2'}) '\r'; sleep 0.5; done -
This command does something similar using dig which is usually more available. Show Sample Output
0for i in $(find . -type f); do echo -n "$i " ;dig +short $(md5sum $i | cut -d' ' -f1).malware.hash.cymru.com TXT; echo ; done -
I had trouble with accent I could do a simple mv by hand but it is not efficient. I found this online http://www.unix.com/shell-programming-and-scripting/158635-remove-spanish-accent-file-name.html but I could not specify the accented letter direcly because it is not in the same encoding as my cli so I changed the char for their octal value. to add accent I use this table http://linux.about.com/library/cmd/blcmdl7_iso_8859-1.htm and add the values to the tr part. the other "duplicates" where not working for me. comment to help me better this script. :) Show Sample Output
0for f in *; do tmp_f=`echo $f | tr "\351" "e"`; if [ "$tmp_f" != "$f" ]; then mv $f $tmp_f; echo "$f is renamed to $tmp_f"; fi done -
Make a backup of the data you have changed last. After running only type backup in new cmd and all files will be in a tar archive in /tmp.
0echo "function backup() { find ~ -type f -mtime 0 | tar cvfz /tmp/24h-backup.tar.gz -T - ;}" >> ~/.bashrc -
0echo ${(o)color}
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Works almost every time.
0echo -e \\033c -
but can't diff dir...
0echo 'diff-cmd = meld' >> ~/.subversion/config -
0echo or cat something | grep -Po '(?<=text_before).*(?=text_after)'
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This sequence of pipes will strip the last newline and send the remainder to the X11 clipboard. I have it as: alias clipb='perl -pe "chomp if eof" | xclip -selection c' so I can just do "echo hello | clipb" Multi-line texts will keep their internal newlines, but the last newline will be removed. This usually makes most sense. Show Sample Output
0echo $MYFILE | perl -pe "chomp if eof" | xclip -selection c -
0echo "\"$(objdump -d BINARY | grep '[0-9a-f]:' | cut -d$'\t' -f2 | grep -v 'file' | tr -d " \n" | sed 's/../\\x&/g')\""
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Returns the global weighted BTC rate in EUR. Requires the "jq" JSON parser. Show Sample Output
0echo "BTC rate is" $(wget https://api.bitcoinaverage.com/ticker/global/EUR/ -q -O - | jq ".last") "?" -
Echo $PATH isn't very easy to read. Show Sample Output
0echo $PATH | sed 's/:/\n/g' | sort | uniq -
I have modified the original one-liner to allow it to manage multiple PIDs. However, I haven't found the way it can work properly with the watch command. NOTE: brace expand must be activated via "set -B" in order to this script can work. Show Sample Output
0cat $(echo "ls /proc/{`pidof firefox | sed -e 's/$/,/' -e 's/ /,/g'`}/smaps 2>/dev/null" | bash) | awk '/Rss/{sum += $2; } END{print sum, "KB"}' -
Force computer "idle" state when lid is closed, regardless of inhibitors (power manager) in place, and runs logind preset action (sleep, suspend...). See http://www.freedesktop.org/software/systemd/man/logind.conf.html
0echo 'LidSwitchIgnoreInhibited=no' > /etc/systemd/logind.conf.d/respect-inhibit-lid.conf -
0for x in {0..90}; do { echo $x $(find . -type f -mtime $x -exec du -cs {} \; |awk -F " " '{sum+=$1} END {sum/=1048576}END{print sum,"G"}'); }; done
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0echo $IP | egrep '^(([0-9]{1,2}|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\.){3}([0-9]{1,2}|1[0-9][0-9]|2[0-4][0-9]|25[0-5])$'
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This command validates if exist any character different in 0-255 and dot. If any characters different is typed the error menssage is showing. Show Sample Output
0echo ${IP} | sed "s/[0-9\.]//g" -
In Thunderbird open the settings for your email account, mark the checkbox for 'Attach the signature from a file instead' and use the filename '~/mailsignature.txt' Now every time when you open a terminal you see the fortune displayed in the terminal and the mail signature gets regenerated. Show Sample Output
0echo 'echo /etc/games/fortune > ~/mailsignature.txt' >> .bashrc -
shell order of operation example which calculates: x = number of physical CPU's y = number of cores per CPU 2(x * y) + 1 = CPU load limit Show Sample Output
0echo "$(( $(( $(grep 'physical id' '/proc/cpuinfo' | uniq | wc -l) * $(grep 'core id' '/proc/cpuinfo' | wc -l) )) * 2 + 1 ))" -
0let NOW=`date +%s`/99516 ; PASS_LAST_CHANGE=`grep $USER /etc/shadow | cut -d: -f3` ; PASS_LIFE=`grep $USER /etc/shadow | cut -d: -f5`; DAYS_LEFT=$(( PASS_LAST_CHANGE + PASS_LIFE - NOW)) ; echo $DAYS_LEFT
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0YYYY=2014; MM=02; for DD in $(cal $MM $YYYY | grep "^ *[0-9]"); do [ ${#DD} = 1 ] && DD=0$DD; echo $YYYY$MM$DD; done
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useful for human readable reports Show Sample Output
0echo "$HOSTNAME restarted $(uptime | tr , ' ' | awk '{print $3" "$4}') ago" - ‹ First < 45 46 47 48 49 > Last ›
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