Commands using read sorted by votes

Commands using read (340)

sorted by

Kill a daemon by name, not by PID

Just find out the daemon with $ netstat -atulpe. Then type in his name and he gets the SIGTERM.
This is sample output - yours may be different.
-5

kill_daemon() { echo "Daemon?"; read dm; kill -15 $(netstat -atulpe | grep $dm | cut -d '/' -f1 | awk '{print $9}') }; alias kd='kill_daemon

P17 · 2009-05-26 20:39:56 7

Credit goes to "eightmillion" Show Sample Output

-5

removedir(){ read -p "Delete the current directory $PWD ? " human;if [ "$human" = "yes" ]; then [ -z "${PWD##*/}" ] && { echo "$PWD not set" >&2;return 1;}; rm -Rf ../"${PWD##*/}"/ && cd ..; else echo "I'm watching you" | pv -qL 10; fi; }

oshazard · 2010-01-20 08:01:21 9

Short one line while loop that outputs parameterized content from one file to another
This is sample output - yours may be different.
-5

while read col1 col23; do echo $col1; done < three-column.txt > first-column.txt

infinull · 2010-07-09 03:59:20 3
Bash logger
This is sample output - yours may be different.
-5

echo -en "$USER@$HOSTNAME:${PWD##*/}> ";while read x;do echo $x>>/tmp/log.txt;echo $x|$0 2>&1;echo -en "$USER@$HOSTNAME:${PWD##*/}> ";done

Nikon · 2011-01-17 20:53:28 13
Move files matching a certain pattern to another folder
This is sample output - yours may be different.
-5

find . | grep ".*\[[Church|CPYAF].*" | while read f; do mv "$f" ../emails;done

evandrix · 2011-06-12 15:37:28 3
Access variables inside a - piped while - loop

Consider the following simple situation [ reading something using while and read ] [See script 1 in sample output] --------------------------------------------------- The variable var is assigned with "nullll" at first. Inside the while loop [piped while] it is assigned with "whillleeee". [Onlly 2 assignments stmts]. Outside the loop the last assigned value for "var" [and no variable] inside the while can't be accessed [Due to pipe, var is executed in a sub shell]. In these type of situation variables can be accessed by modifying as follows. [See script 2 in sample output] ___________________________ Vary helpful when reading a set of items, say file names, stored on a file [or variable] to an array an use it later. Is there any other way 2 access variables inside and outside the loop ?? Show Sample Output
This is sample output - yours may be different.
```
script 1
__________________
#!/bin/bash

var="nullll"
echo "var=$var"
echo
str="aa
bb
cc"

echo "$str" | while read line
do
echo "line=$line"
echo "var=$var"
var="whillleeee"

done 

echo
echo "line=$line"
echo "var=$var"



------------------------------
Output
----------------------------
var=nullll

line=aa
var=nullll
line=bb
var=whillleeee
line=cc
var=whillleeee

var=nullll
___________________________________________________________
script 2---------------------------------------------------
___________________________________________________________

#!/bin/bash

var="nullll"
echo "var=$var"
echo
str="aa
bb
cc"

while read line
do
echo "line=$line"
echo "var=$var"
var="whillleeee"

done <<< "$str"

echo
echo "var=$var"

----------------------------------
Output
------------------------------------

var=nullll

line=aa
var=nullll
line=bb
var=whillleeee
line=cc
var=whillleeee

var=whillleeee
```
-5

while read line; do echo $line; done <<< "$var"

totti · 2011-09-22 16:53:32 5
remove all spaces from all files in current folder
This is sample output - yours may be different.
-5

ls -1 | while read a; do mv "$a" `echo $a | sed -e 's/\ //g'`; done

antonangeli · 2015-10-27 12:52:47 14
Read directory contents recursively

Read all contents from current directory and display to stdout.
This is sample output - yours may be different.
-6

while read f;do echo "$f";done < <(find .)

unixmonkey8504 · 2010-03-02 14:22:22 3
Compile all C files in a directory

Compile *.c files with "gcc -Wall" in actual directory, using as output file the file name without extension.
This is sample output - yours may be different.
-7

ls *.c | while read F; do gcc -Wall -o `echo $F | cut -d . -f 1 - ` $F; done

pichinep · 2009-08-28 13:01:56 9
Simple calculus

Exit with empty line
This is sample output - yours may be different.
-7

read c; while [ -n "$c" ]; do clear; echo -e "$c = "$(echo "$c" |bc -l)"\n"; read c; done

mrttlemonde · 2011-11-13 10:28:40 9
ls -lR with a full path

I find the ouput of ls -lR to be un-satisfying (why is the path data up there?) and find syntax to be awkward. Running 'du -a' means you will have likely to trim-off filesize data before feeding filenames to the next step in the pipe.
This is sample output - yours may be different.
-8

tar -cvf /dev/null . | while read i; do ls -l $i; done

lbonanomi · 2009-09-16 16:59:15 8
Read directory contents recursively

Read all contents from current directory and display it on stdout.
This is sample output - yours may be different.
-8

find . |while read f;do echo "$f";done

unixmonkey8504 · 2010-03-02 14:21:15 7
Replace spaces with '_' in filenames

Takes filenames and directory names and replace space to '_'.
This is sample output - yours may be different.
-9

find -depth . | (while read FULLPATH; do BASENAME=`basename "${FULLPATH}"`; DIRNAME=`dirname "${FULLPATH}"`; mv "${DIRNAME}/${BASENAME}" "${DIRNAME}/${BASENAME// /_}"; done)

mohan43u · 2009-03-24 21:04:32 11
gunzip all .gz file in current dir

gunzip all .gz file in current dir
This is sample output - yours may be different.
-10

ls | grep .gz >> list.txt && cat list.txt | while read x ; do gunzip -d $x ; done && rm -rf list.txt

maccu · 2010-11-17 11:06:02 14
Combining text files into one file
This is sample output - yours may be different.
-16

ls | grep *.txt | while read file; do cat $file >> ./output.txt; done;

octopus · 2010-04-16 13:19:38 6
‹ First < 12 13 14

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

Print a single route to a destination and its contents exactly as the kernel sees it

Useful to determine the source_ip of outgoing packages to a certain destination

grep for minus (-) sign

Use flag "--" to stop switch parsing

diff the same file in two directories.

This is useful when you're diffing two files of the same name in radically different directory trees. For example: Set $ path1='/some/long/convoluted/path/to/all/of/your/source/from/a/long/dead/machine' then $ path2='/local/version/of/same/file' then run the command. Much easier on the eyes when you're looking back across your command history, especially if you're doing the same diff over and over again.

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

Get absolut path to your bash-script

Blink LED Port of NIC Card

Blinks LED of a NIC card. Its used when you have multiple NICs and you want to identify the physical port of a particular ethernet card.

find sparse files

Prints the path/filename and sparseness of any sparse files (files that use less actual space than their total size because the filesystem treats large blocks of 00 bytes efficiently).

Update twitter with curl

Same as below, but no quotes are necessary when twitting more than one word

Get full from half remembered commands

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

Make changes in .bashrc immediately available

Simply sourcing .bashrc does not function correctly when you edit it and change an alias for a function or the other way round with the *same name*. I therefor use this function. Prior to re-sourcing .bashrc it unsets all aliases and functions.

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands using read

Commands using read (340) the last day the last week the last month all time sorted by date votes

What's this?

Check These Out

Stay in the loop…

Commands using read (340)

sorted by