Yesterday Used jenkins practiced well today while opening jenkins getting error

Question

java.io.IOException: Permission denied
	at java.base/java.io.UnixFileSystem.createFileExclusively(Native Method)
	at java.base/java.io.File.createTempFile(File.java:2129)
	at hudson.util.AtomicFileWriter.<init>(AtomicFileWriter.java:143)
Caused: java.io.IOException: Failed to create a temporary file in /var/lib/jenkins
	at hudson.util.AtomicFileWriter.<init>(AtomicFileWriter.java:145)
	at hudson.util.AtomicFileWriter.<init>(AtomicFileWriter.java:110)
	at hudson.util.AtomicFileWriter.<init>(AtomicFileWriter.java:75)
	at hudson.util.TextFile.write(TextFile.java:101)
	at jenkins.model.Jenkins.<init>(Jenkins.java:947)
	at hudson.model.Hudson.<init>(Hudson.java:86)
	at hudson.model.Hudson.<init>(Hudson.java:82)
	at hudson.WebAppMain$3.run(WebAppMain.java:247)
Caused: hudson.util.HudsonFailedToLoad
	at hudson.WebAppMain$3.run(WebAppMain.java:264)