Commands using tail sorted by votes

Commands using tail (292)

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Tail -f: truncate and search

Outputs / monitors the content of the LOG_FILE , which matches the SEARCH_STR. The output is cutted by spaces (as delimiter) starting from column 7 till the end.
This is sample output - yours may be different.
0

tail -f LOG_FILE | grep --line-buffered SEARCH_STR | cut -d " " -f 7-

pjsb · 2014-08-07 10:40:45 8
coloured tail
This is sample output - yours may be different.
0

tail -f FILE | ccze

ujang · 2014-08-18 10:07:28 8

This is a specialized command for Ericsson CS5.2 - Getting the test case trace on SDP

This command allows to follow up a trace on SDP (CS5.2), at the same time as the trace records are stored in the file with "raw" format. Trace files in native format are useful to filter the records before to translation from '|' to '\n'. Example: grep -v OP_GET <raw-records>.trace | tr '|' '\n' Show Sample Output

tail -1f /var/opt/fds/logs/TraceEventLogFile.txt.0 | grep <msisdn> | tee <test-case-id>.trace | tr '|' '\n'

neomefistox · 2014-08-21 19:29:07 11

10 files backup rotate in crontab

this command can be added to crontab so as to execute a nightly backup of directories and store only the 10 last backup files.
This is sample output - yours may be different.
0

for file in $(find /var/backup -name "backup*" -type f |sort -r | tail -n +10); do rm -f $file; done ; tar czf /var/backup/backup-system-$(date "+\%Y\%m\%d\%H\%M-\%N").tgz --exclude /home/dummy /etc /home /opt 2>&- && echo "system backup ok"

akiuni · 2014-09-24 14:04:11 10
Thread count by process, sorted + total

I occasionally need to see if a machine is hitting ulimit for threads, and what process is responsible. This gives me the total number, sorted low to high so the worst offender is at the end, then gives me the total number of threads, for convenience.
This is sample output - yours may be different.
0

(ps -U nms -o pid,nlwp,cmd:500 | sort -n -k2) && (ps -U nms -o nlwp | tail -n +2 | paste -sd+ | bc)

cmullican · 2014-09-30 18:25:56 9
grc tail -f
This is sample output - yours may be different.
0

grcat conf.ps < /var/log/apache2/error.log | tail -f

nomikos · 2014-11-05 13:44:12 35

Show apps that use internet connection at the moment.

Show top apps that use internet, sorted by count connections and grouped by TYPE and Protocol Show Sample Output

sudo lsof -P -i -n | awk '{print $1,$5,$8}' | tail -n +2 | uniq -c | sort -nr

anton_slim · 2014-12-18 05:22:33 9

Watch who requests what page from apache logs

Use this command to watch apache access logs in real time to see what pages are getting hit. Show Sample Output
This is sample output - yours may be different.
```
127.0.0.1 "http://example.com/example-page.html"
127.0.0.1 "http://example.com/index.html"
127.0.0.1 "http://example.com/index.html"
```
0

tail -f access_log | awk '{print $1 , $12}'

tyzbit · 2014-12-24 14:15:52 10

Unpack magnatune flac album and move artwork into album dir

https://www.magnatune.com depends on unp but does not need to but unp is the easiest way to unpack any archive. it's in Debian repo's. !note: it deletes flac zip when done, if successful. Show Sample Output

magunp() {for i in ./*-flac.zip ;do AlbumPath="$(dirname "$(unzip -l -qq "$i" |tail -n 1 |cut -c 31-)")" && unp "$i" && mv ./cover.jpg "$AlbumPath/" && mv ./artwork.pdf "$AlbumPath/" && ls "$AlbumPath/" ; rm "$i";done ;}

astr · 2014-12-25 15:04:56 10

nmap scan hosts for IP, MAC Address and device Vendor/Manufacturer

In the field, I needed to script a process to scan a specific vendor devices in the network. With the help of nmap, I got all the devices of that particular vendor, and started a scripted netcat session to download configuration files from a tftp server. This is the nmap loop (part of the script). You can however, add another pipe with grep to filter the vendor/manufacturer devices only. If want to check the whole script, check in http://pastebin.com/ju7h4Xf4 Show Sample Output
This is sample output - yours may be different.
```
10.0.0.1 AA:BB:CC:DD:EE:FF (Vendor)
10.0.0.2 BB:CC:DD:EE:FF:AA (Manufacturer)
10.0.0.3 FF:FF:FF:FF:FF:FF (Unknown)
```
0

nmap -sP 10.0.0.0/8 | grep -v "Host" | tail -n +3 | tr '\n' ' ' | sed 's|Nmap|\nNmap|g' | grep "MAC Address" | cut -d " " -f5,8-15

jaimerosario · 2014-12-26 18:31:53 13
compute the total disk space consumed by a list of files

Given a list of filenames, one per line, in /tmp/filelist, calculate the total sum disk usage.
This is sample output - yours may be different.
0

LISTCOUNT=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

mwtzzz · 2015-01-13 00:53:04 8
Find the date of the first commit in a git repository

Finds the date of the first commit in a git repository branch Show Sample Output
This is sample output - yours may be different.
```
Wed Jun 25
```
0

git rev-list --all|tail -n1|xargs git show|grep -v diff|head -n1|cut -f1-3 -d' '

binaryten · 2015-02-04 19:35:18 13
Ping your gateway at home

I run into regular problems whereby my cable modem from my ISP will simply stop working. To ensure that it is a problem with my cable modem (and not the router in-between my machine and the cable modem), I needed a quick way to test to someplace beyond the cable modem. The place shouldn't be beyond the cable network though. As such, I needed to determine the gateway to which my cable modem was connected. Since my router cannot do this on it's own... I created a single line command that will ping the gateway IP address based upon knowing that my gateway will be my second hop (after my wifi router), tracerouting for 2 hops, pulling the last line of the traceroute output and grep'ing for just the IP address. To stop pinging, use . This works on linux and osx and, with the addition of cygwin tools or the win-gnu project... should work on windows as well. Show Sample Output
This is sample output - yours may be different.
```
traceroute to 8.8.8.8 (8.8.8.8), 2 hops max, 52 byte packets
PING #.#.#.# (#.#.#.#): 56 data bytes
64 bytes from #.#.#.#: icmp_seq=0 ttl=63 time=11.282 ms
64 bytes from #.#.#.#: icmp_seq=1 ttl=63 time=11.902 ms
64 bytes from #.#.#.#: icmp_seq=2 ttl=63 time=9.519 ms
```
0

ping `traceroute -m 2 8.8.8.8 |tail -1|grep -E -o "([0-9]{1,3}[\.]){3}[0-9]{1,3}"`

andrewgearhart · 2015-03-25 19:55:54 74
Read Squid logs with human-readable timestamp in Pfsense
This is sample output - yours may be different.
0

tail -f /var/squid/logs/access.log | perl -pe 's/(\d+)/localtime($1)/e'

carlosesteves · 2015-05-06 15:53:07 9
Print dmesg periodically
This is sample output - yours may be different.
0

watch -n 0.1 \"dmesg | tail -n \$((LINES-6))\"

kafka · 2015-06-12 05:40:58 91
Epoch from time protocol port 37

Time protocol serves up seconds since 1900 in a 32 bit binary number. Show Sample Output
This is sample output - yours may be different.
```
1443004481
```
0

telnet time.nist.gov 37 2>/dev/null |tail -1 | xxd | awk '{print $2 $3}'|tr -d '\n' | perl -nwe "print scalar(hex($1)-2208988800).\"\n\""

quesne · 2015-09-23 10:42:36 9
Not able to data in tee on using dual command like: tail and grep
This is sample output - yours may be different.
0

tail -f log.txt | egrep --line-buffered 'WARN|ERROR' | tee filtered_output.txt

zarvis · 2015-09-29 11:12:52 9
ps to show child thread PIDs
This is sample output - yours may be different.
0

ls -1 /proc/$(ps ax | grep <Process Name> | head -n 1 | awk '{print $1;}')/task | tail -n +2

happymarmoset · 2015-10-06 07:44:48 10
do anything with the last created (touched, accessed) file in the current dir

This command will display the file, but you can change 'cat' to anything else (type 'n' when prompted to cancel the command or anything else to proceed). . Some hints for newbies: type unset bar to make 'bar' function annihilated. For permanent usage you can put this (bar) function in your .bashrc (for bash) or in .profile (for sh). With: . ~/.bashrc you can get all new inserted functions in .bashrc (so the function 'bar' or whatever name you choose) immediately available. Show Sample Output
This is sample output - yours may be different.
```
$ bar
cat backup.sh? <y/n> ^C
```
0

bar() { foo=$(ls -rt|tail -1) && read -ep "cat $foo? <y/n> " a && [[ $a != "n" ]] && eval "cat $foo" ;}

knoppix5 · 2015-10-21 20:09:33 13
Screenshot a part of the screen, upload to S3 and copy URL to clipboard

Poor man's Clipular.com
This is sample output - yours may be different.
0

scrot -s -e 's3cmd -P put $f s3://my-bucket-screenshots/ | tail -n 1 | cut -d " " -f 7 | xsel -i -v --primary'

runixo · 2015-10-29 13:43:58 11
Run 'tail' on selected files in current directory
This is sample output - yours may be different.
0

for i in *.csv; do tail $i; done

swarzynski · 2015-11-19 10:07:59 11
Delete all folders except the 10 latest ones AND specific excluded ones

If there are less than 10 folders, this script will not delete them
This is sample output - yours may be different.
0

find . -mindepth 1 -maxdepth 1 ! -name 'exclude_folder1' ! -name 'exclude_folder2' -type d -exec ls -tld {} \+ | tail +11 | xargs --no-run-if-empty -L 1 rm -rf

chambooca · 2015-12-08 19:56:02 9
enable all bash completions in gentoo

Pros: * it's much faster then for loop * removes first line of 'eselect bashcomp list' - which contains text "Available completions:"
This is sample output - yours may be different.
0

eselect bashcomp enable --global $(eselect bashcomp list | tail -n +2 | awk '{print $2}' |xargs)

eNcacz · 2016-02-12 16:53:22 12
tail from the last occurrence of a pattern to the end of the (log) file

I wanted a method to display the last run of my script from my log file. I had a pattern I could grep for to find the beginning of each run. This command line greps for that pattern in the log, finds the last occurrence and gives me the line number. Then I use the line number in tail to give me everything from that line number to the end of the log file. I tested this on Linux Mint (variant of Ubuntu) and on RHEL, but I suspect it will run many Linux systems.
This is sample output - yours may be different.
0

grep -n PATTERN /logs/somelog.log | cut -f1 -d: | tail -1 | xargs -I num tail -n +num /logs/somelog.log

goeltzec · 2016-07-29 15:47:26 19
check open ports without netstat or lsof

Order and uniq
This is sample output - yours may be different.
0

declare -a array=($(tail -n +2 /proc/net/tcp | cut -d":" -f"3"|cut -d" " -f"1")) && for port in ${array[@]}; do echo $((0x$port)); done | sort | uniq

lucasjr76 · 2016-08-19 03:20:59 18
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Detect illegal access to kernel space, potentially useful for Meltdown detection

Based on capsule8 agent examples, not rigorously tested

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Use lynx to run repeating website actions

This command will tell lynx to read keystrokes from the specified file - which can be used in a cronjob to auto-login on websites that give you points for logging in once a day *cough cough* (which is why I used -accept_all_cookies). For creating your keystroke file, use: $ lynx -cmd_log yourfile

Convert seconds to [DD:][HH:]MM:SS

Get full from half remembered commands

Show all commands having the part known by you. Eg: $apropos pdf | less

Faster find and move using the find and xargs commands. Almost as fast as locate.

Only tested on Linux Ubunty Hardy. Works when file names have spaces. The "-maxdepth 2" limits the find search to the current directory and the next one deeper in this example. This was faster on my system because find was searching every directory before the current directory without the -maxdepth option. Almost as fast as locate when used as above. Must use double quotes around pattern to handle spaces in file names. -print0 is used in combination with xargs -0. Those are zeros not "O"s. For xargs, -I is used to replace the following "{}" with the incoming file-list items from find. Echo just prints to the command line what is happening with mv. mv needs "{}" again so it knows what you are moving from. Then end with the move destination. Some other versions may only require one "{}" in the move command and not after the -I, however this is what worked for me on Ubuntu 8.04. Some like to use -type f in the find command to limit the type.

remove OSX resource forks ._ files

DESCRIPTION For each dir, dot_clean recursively merges all ._* files with their cor- responding native files according to the rules specified with the given arguments. By default, if there is an attribute on the native file that is also present in the ._ file, the most recent attribute will be used. If no operands are given, a usage message is output. If more than one directory is given, directories are merged in the order in which they are specified.

Get your external IP address

Request all information about my IP address in json format

see who's using DOM storage a/k/a Web Storage, super cookies

Someone over at Mozilla dot Org probably said, "I know, let's create a super-duper universal replacement for browser cookies that are persistent and even more creepy and then NOT give our browser users the tools they need to monitor, read, block or selectively remove them!" . This will let you see all the DOM object users in all your firefox profiles. Feel free to toss a `| sort -u` on the end to remove dupes. . I highly recommend you treat these as "session cookies" by scripting something that deletes this sqlite database during each firefox start-up. . note: does not do anything for so-called "flash cookies"

A fun thing to do with ram is actually open it up and take a peek. This command will show you all the string (plain text) values in ram

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Commands using tail (292)

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