EN
Linux empty a file
2 points
Quick solution:
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cp /dev/null my_filename.txtPractical example.
In below example we empty the tomcat logs.
Steps:
- Before the file size is 636M
- We executed the command to empty the file
cp /dev/null catalina.out - After the file size is 0
Below we have an example from linux command line.
Before - file size 636M:
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root@local:/opt/tomcat/logs# ls -alh2
-rw-r----- 1 root root 636M Jan 14 20:22 catalina.outExecute command:
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root@local:/opt/tomcat/logs# cp /dev/null catalina.outAfter - file size 0:
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root@local:/opt/tomcat/logs# ls -alh2
-rw-r----- 1 root root 0 Jan 14 20:23 catalina.out1. It is posible to redirect empty string into file.
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echo -n > my_filename.txt2. dev-null redirection gives same result
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cat /dev/null > my_filename.txt