The command line in Linux is powerful, but it also allows a user to do a lot of dangerous things. Removing files with a wildcard is one of those things where a misplace space or typoed command can remove a lot more files that expected. One of the worst feelings …
Sometimes you may find that you are getting a lot of unwelcome traffic from a particular country. This may be a compromised server trying to find exploits, or sometimes it a badly tuned search engine that is hammering your webserver. In this post, I’ll provide a script that will help …
For more details about X.509 certificates, you can read the wikipedia article at https://en.wikipedia.org/wiki/X.509 Display Certificate Values subject, expiry, signature algorithm, fingerprint, modulus md5 sum CERT=crt.pem echo; echo “Cert:” $CERT; CERTV=$(openssl x509 -text -noout -in $CERT);echo -n “Subject: “;echo “$CERTV”|grep -i [S]ubject:|cut -d ‘:’ -f 2;echo -n “Issuer Date: “;echo …
I had a mysqldump that wasn’t playing nice and would error out 745,273 lines into the dump. The error log wasn’t useful so to look at the exact line, I did this: sed -n “745273 p” dump.sql The syntax is: sed -n “linenumber p” file.txt