Bash scripts create temporary files and signal capture

Script to create temporary files:

#mktemp Create a temporary file or directory

#mktemp [OPTION] FILE. Randomlength

[OPTION]

-D Create a directory.

For example:

#mktemp/tmp/file. Xx

/tmp/file.36

#mktemp/tmp/file. Xx

/tmp/file.37

#mktemp/tmp/file. Xx

/tmp/file.38

#mktemp/tmp/file.xxxx

/tmp/file/1234

#mktemp/tmp/file.xxxx

/tmp/file/1235

#mktemp-D/tmp/file.xx

#ll

Drwxr-xr-x/tmp/file.33

Tips for use:

#FILE = ' mktemp/tmp/file.xx ' Saves the result to a FILE variable and can be called multiple times.

#echo $FILE

/tmp/file.33

#echo $FILE

/tmp/file.33

#unset FILE is not used when you delete a variable.

The script implements the signal capture:

9 and 15 cannot be captured.

CTRL + C = SIGINT terminated.

#trap capture the signal.

#trap ' COMMAND ' siglist

For example:

1. Achieve signal capture:

#vim a.sh

#!/bin/bash

Trap ' echo ' not end ' INT

While:;d o

Date

Sleep 2

Done

2. Write a script to test the host in the network segment, while cleaning up the temporary files generated by the script.

#vim ping.sh

#!/bin/bash

net=192.168.0

File=mktemp/tmp/file.xxx

Clearup () {

echo "Quit"

Rm-f $FILE

Exit 1

}

Tarp ' Clearup () ' Sigini

For I in {1..254};d o

If Ping-c 1-w 1 $NET. $I &>/dev/null;then

echo "$NET. $I is up" |tee >> $FILE

Else

echo "$NET. $I is Down"

Fi

Done

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Bash scripts create temporary files and signal capture