A page of Unix gems which I occasionally find useful:
List hosts on Network:
nmap -sP 10.0.0.0/24
list ports used:
netstat -na
lsof -i
or
sudo lsof -i :port
Copy lots of files between hosts:
rsync -r -v --progress -e ssh /home/user/ user@remote-system:/address/to/remote/file
Cronjobs:
crontab -e
- Opens an editor with the current crontab-file
crontab -l
- List the content of the current crontab-file
crontab -r
- Remove the current crontab-file
crontab FILENAME
- Set the current crontab-file to FILENAME
Symbolic links:
ln -sf filename symbolicname
Create a 2Mb file with random junk:
dd if=/dev/urandom of=~/foo.txt bs=1M count=2
Using tar to compress files:
tar -zcf filenavn.tar.gz *
Decompress:
tar -zxvf filenavn.tar.gz
Recursive grep'ping:
grep -R "server.configuration.dir" --include '*.xml' *
List hosts on Network:
nmap -sP 10.0.0.0/24
list ports used:
netstat -na
lsof -i
or
sudo lsof -i :port
Copy lots of files between hosts:
rsync -r -v --progress -e ssh /home/user/ user@remote-system:/address/to/remote/file
Cronjobs:
crontab -e
- Opens an editor with the current crontab-file
crontab -l
- List the content of the current crontab-file
crontab -r
- Remove the current crontab-file
crontab FILENAME
- Set the current crontab-file to FILENAME
Symbolic links:
ln -sf filename symbolicname
Create a 2Mb file with random junk:
dd if=/dev/urandom of=~/foo.txt bs=1M count=2
Using tar to compress files:
tar -zcf filenavn.tar.gz *
Decompress:
tar -zxvf filenavn.tar.gz
Recursive grep'ping:
grep -R "server.configuration.dir" --include '*.xml' *
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