Commands by udog

Commands by udog (5)

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Read, Evaluate, Print, Loop - REPL Show Sample Output

cpan Devel::REPL; re.pl

udog · 2013-02-08 11:26:45 14

Find all relevant certificates (excluding some dirs) and list them each

Finds all cert files on a server and lists them, finding out, which one is a symbolic link and which is true. You want to do this when a certificate expires and you want to know which files to substitute with the new cert. Show Sample Output
This is sample output - yours may be different.
```
foo.com.crt
bar.com.crt
```
0

for crt in $(locate -r '.+\.crt' | grep -v "/usr/share/ca-certificates/"); do ls -la $crt; done

udog · 2010-08-23 12:22:48 6
Check syntax of all Perl modules or scripts underneath the current directory

Finds all *.p[ml]-files and runs a perl -c on them, checking whether Perl thinks they are syntactically correct Show Sample Output
This is sample output - yours may be different.
```
./foo.pl syntax OK
./bar/Baz.pm syntax OK
...
```
1

for code in $(find . -type f -name '*.p[ml]'); do perl -c "$code"; done

udog · 2010-05-29 23:26:40 8
Update many subversion projects which reside in one directory

If you have a directory with many working copies of various subversion projects and you want to update them all at once, this one may be for you. Show Sample Output
This is sample output - yours may be different.
```
Authentication realm: <https://foo.com:443> foo-project
Password for 'foodoo': 
At revision 221.
```
-2

for d in $(find . -maxdepth 1 -type d -name '[^.]*'); do cd "$d"; svn up; cd ..; done

udog · 2010-05-28 10:09:19 5
Produce a pseudo random password with given length in base 64

Of course you will have to install Digest::SHA and perl before this will work :) Maximum length is 43 for SHA256. If you need more, use SHA512 or the hexadecimal form: sha256_hex() Show Sample Output
This is sample output - yours may be different.
```
nqSj9EG1qsQ
```
1

perl -MDigest::SHA -e 'print substr( Digest::SHA::sha256_base64( time() ), 0, $ARGV[0] ) . "\n"' <length>

udog · 2010-04-30 21:45:46 4

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Show what PID is listening on port 80 on Linux

Resize a Terminal Window

Replace 70 with the desired height. Replace 180 with the desired width. I put it in my bashrc, because by default my terminal is too small.

tar and remove files which are older that 100 days

tar does not have a -mtime option as find. tar appends all the file to an existing tar file.

Run remote web page, but don't save the results

I have a remote php file that I want to run once an hour. I set up cron to run this wget. I don't really care about what's in the file though, I don't want to save the results, so I run the -O and send it to /dev/null

Broadcast your shell thru ports 5000, 5001, 5002 ...

run 'nc yourip 5000', 'nc yourip 5001' or 'nc yourip 5002' elsewhere will produce an exact same mirror of your shell. This is handy when you want to show someone else some amazing stuff in your shell without giving them control over it.

Oneliner to run commands on multiple servers

Oneliner to run commands on multiple servers over ssh. - First parameter "$1" is the command you want to execute remotely. ( It can be multiple commands e.g. "hostname;uptime") - Second parameter "${@:2}" represents the remote host/s you want to run the command/s on.

lists files and folders in a folder

lists files and folders in a folder with summary.

draw honeycomb

$ tput setaf 1 && tput rev && seq -ws "___|" 81|fold -69|tr "0-9" "_" && tput sgr0 $ $ # (brick wall)

List your sudo rights

List the commands you have the right to use with sudo.

Making scripts runs on backgourd and logging output

Save all output to a log.

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Commands by udog (5)

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