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Echo PID of the current running command

Actually $! is an internal variable containing PID of the last job in background. More info: http://tldp.org/LDP/abs/html/internalvariables.html#PIDVARREF Using $! for job control: possibly_hanging_job & { sleep ${TIMEOUT}; eval 'kill -9 $!' &> /dev/null; }
This is sample output - yours may be different.
-2

command & echo $!

Mahrud · 2011-06-08 18:16:38 4
Fast, built-in pipe-based data sink
This is sample output - yours may be different.
-2

command >&-

lhunath · 2011-08-30 13:52:09 9
Figure out what shell you're running
This is sample output - yours may be different.
-3

ps ho command $$

j_melis · 2011-02-05 10:24:33 7
Search Google from the command line and return the first result.

Yep, now you can finally google from the command line! Here's a readable version "for your pleasure"(c): google() { # search the web using google from the commandline # syntax: google google query=$(echo "$*" | sed "s:%:%25:g;s:&:%26:g;s:+:%2b:g;s:;:%3b:g;s: :+:g") data=$(wget -qO - "https://ajax.googleapis.com/ajax/services/search/web?v=1.0&q=$query") title=$(echo "$data" | tr '}' '\n' | sed "s/.*,\"titleNoFormatting//;s/\":\"//;s/\",.*//;s/\\u0026/'/g;s/\\\//g;s/#39\;//g;s/'amp;/\&/g" | head -1) url="$(echo "$data" | tr '}' '\n' | sed 's/.*"url":"//;s/".*//' | head -1)" echo "${title}: ${url} | http://www.google.com/search?q=${query}" } Enjoy :) Show Sample Output
This is sample output - yours may be different.
```
hunterm:~ >>> google bash
bash.org: http://www.bash.org/ | http://www.google.com/search?q=bash
```
-7

The command is too big to fit here. :( Look at the description for the command, in readable form! :)

hunterm · 2011-01-05 02:45:28 8
ps- ef | grep pmon
This is sample output - yours may be different.
-22

this command is to see oracle instance process on linux server

kirakast · 2009-02-20 03:40:29 41
< 1 2 3

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Exiftool adjust Date & Time of pictures

Change the original date set by camera : Create Date : 2020:08:21 13:26:24.63 //Operating System: Date Created (ie: sdcard) Date/Time Original : 2020:08:21 13:26:24.63 // Set by camrea when you point and click for photo Modify Date : 2020:08:21 13:26:24.63 //Operating System: Modified (ie: sdcard) Exif argument examples are : exiftool.exe “-DateTimeOriginal+=0:0:0 5:30:0” filename.jpg (add 5 hours and 30 minutes to the Exif Date/Time Original) exiftool.exe" "-modifydate-=0:0:0 0:25:0" filename.jpg (reduce the Exif Modify Date to 25 minutes) exiftool.exe “-AllDates+=Y:M:D h:m:s” filename.jpg (Change all exif date values to Y:M:D h:m:s)

Backup (archive) your Gmail IMAP folders.

Copies an entire hierarchy of mailboxes from the named POP3/IMAP/etc. source to the named destination. Mailboxes are created on the destination as needed. NOTE: The 'mailutil' is Washington's University 'mailutil' (apt-get install uw-mailutils). More examples $ mailutil transfer {imap.gmail.com/ssl/user=you@gmail.com}INBOX Gmail/ ; mailutil check imap.gmail.com/ssl/user=you@gmail.com}\[Gmail\]/Spam If you use the utility in the first, append -v|-d flag(s) to the end the commands above (man mailutil).

This allows you to find a string on a set of files recursivly

The -r is for recursive, -F for fixed strings, --include='*.txt' identifies you want all txt files to be search any wildcard will apply, then the string you are looking for and the final * to ensure you go through all files and folders within the folder you execute it.

list files recursively by size

Print the contents of $VARIABLE, six words at a time

Print out the contents of $VARIABLE, six words per line, ignoring any single or double quotes in the text. Useful when $VARIABLE contains a sentence that changes periodically, and may or may not contain quoted text.

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" }

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

list files recursively by size

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

execute your commands and avoid history records

$ secret_command;export HISTCONTROL= This will make "secret_command" not appear in "history" list.

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Commands using command (55)

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