Commands using tail (292)
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Runs "php -i", filter the error_log location, then watches it using "tail"
0tail -v -f $(php -i | grep "^[ \t]*error_log" | awk -F"=>" '{ print $2; }' | sed 's/^[ ]*//g') -
This will be useful when checking for logs and have to omit specific weblogic or apache server's log information which are redundant and unnecessary. Show Sample Output
0tail -f test | grep -v "bea" -
0curl -Ls https://nmap.org/dist/ | sed -En '/nmap.*tgz/s@^.*href="([^"]+)".*$@https://nmap.org/dist/\1@p' | tail -n1
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alex@alex-box:~$ slThe program 'sl' is currently not installed. You can install it by typing: sudo apt-get install slalex@alex-box:~$ dolastReading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: sl 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.0alias dolast='$( $(history 2| head -n 1| sed "s/.* //") 2>&1 | tail -n 1)' -
Command #If not installed suggest a package. 2>&1 #Send stderr to stdout, for tail can read it tail -1 #Show last line. `Comand` #execute output of command. Show Sample Output
0`command 2>&1|tail -1` -
Tails make.out file and pipes it to sed which uses 3 colors: green: percentage (eg: 10%) yellow: warning (case insensitive) red: error (case insensitive)
0tail -f ~/make.out | sed -e 's/\(...%\)/\o033[32m\1\o033[39m/' -e 's/\(.*[Ww][Aa][Rr][Nn][Ii][Nn][Gg].*\)/\o033[33m\1\o033[39m/' -e 's/\(.*[Ee][Rr][Rr][Oo][Rr].*\)/\o033[31m\1\o033[39m/' -
0ls -t /mcdata/archive/learn/backup-moodle2-course-* | tail -n +11 | xargs -I {} rm {}
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logstalgia must be installed
0ssh -n user@server.tr tail -f /usr/local/nginx/logs/access.log > /tmp/access | tail -f /tmp/access | logstalgia -
0tail -f some_log_file.log | grep --line-buffered the_thing_i_want
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0tail -f some_log_file.log | grep the_thing_i_want
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"-F" will continue tailing if file is closed and another file opened with same name. This is handy for tailing log files that segment while watching them without having to issue the command again.
0tail -F some_log_file.log | grep the_thing_i_want -
0tail -F some_log_file.log | grep --line-buffered the_thing_i_want
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0cat squid.log| awk -v x=9000 '$2 >=x' | sort -hs| tail -n 100
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0ls -tr ~/Downloads/*.pdf|tail -1
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Was to long with a loop, use a while loop for have it running 24/7
0inotifywait -r -q --format %w /var/log/auth.log|grep -i "Failed pass"|tail -n 1|grep -oE '\b([0-9]{1,3}\.){3}[0-9]{1,3}';iptables -I INPUT -i eth0 -s "$(cat /var/log/auth.log|grep "authentication failure; l"|awk -Frhost= '{print $2}'|tail -n 1)" -j DROP -
tells you the number of lines in said file, and then tail the last 100 lines ( or how many are messed up) then u take the total amount of lines and then subract the 100 or so lines u DONT WANT, then do a head -n $new_number and then redirect it to new file.db
-1cat -n $file | tail -n 100 && head -n number-of-lines-you-want-to-keep > newfile -
Next time you see a mac fanboy bragging about 64-bitness of 10.6 give him this so he might sh? Show Sample Output
-1file /System/Library/Extensions/*.kext/Contents/MacOS/* |grep -i x86_64 |nl |tail -1 |cut -f1 -f3 && file /System/Library/Extensions/*.kext/Contents/MacOS/* |grep -v x86_64 |nl |tail -1 |cut -f1 -f3 -
"get Hong Kong weather infomation from HK Observatory From Hong Kong Observatory wap site ;)" other one showed alot of blank lines for me Show Sample Output
-1wget -q -O - 'http://wap.weather.gov.hk/' | sed -r 's/<[^>]+>//g;/^UV/q' | tail -n4 -
using tail first won't do it because tail counts from the bottom of the file. You could do it this way but I don't suggest it
-1head -n X | tail -n 1 -
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 $(pgrep java)|sed 's/ /,/')}/fd/")|grep log|sed 's/[^/]* //g'|xargs -r tail -f -
-1curl -s http://www.last.fm/user/$LASTFMUSER | grep -A 1 subjectCell | sed -e 's#<[^>]*>##g' | head -n2 | tail -n1 | sed 's/^[[:space:]]*//g'
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Substitute that 724349691704 with an UPC of a CD you have at hand, and (hopefully) this oneliner should return the $Artist - $Title, querying discogs.com. Yes, I know, all that head/tail/grep crap can be improved with a single sed command, feel free to send "patches" :D Enjoy! Show Sample Output
-1wget http://www.discogs.com/search?q=724349691704 -O foobar &> /dev/null ; grep \/release\/ foobar | head -2 | tail -1 | sed -e 's/^<div>.*>\(.*\)<\/a><\/div>/\1/' ; rm foobar -
-1ps aux | awk {'sum+=$3;print sum'} | tail -n 1
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Replace the head -1 with head -n that is the n-th item you want to go to. Replace the head with tail, go to the last dir you listed. You also can change the parameters of ls.
-1cd $(ls -ltr|grep ^d|head -1|sed 's:.*\ ::g'|tail -1) -
Sort by time and Reverse to get Ascending order, then display a marker next to the a file, negate directory and select only 1 result Show Sample Output
-1ls -trF | grep -v \/ | tail -n 1 - ‹ First < 8 9 10 11 12 >
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