Check These Out
I've been using it in a script to build from scratch proxy servers.
Ever need to know why Apache is bogging down *right now*? Hate scanning Apache's Extended server-status for the longest running requests? Me, too. That's why I use this one liner to quickly find suspect web scripts that might need review.
Assuming the Extended server-status is reachable at the target URL desired, this one-liner parses the output through elinks (rendering the HTML) and shows a list of active requests sorted by longest running request at the bottom of the list. I include the following fields (as noted in the header line):
Seconds: How long the request is alive
PID: Process ID of the request handler
State: State of the request, limited to what I think are the relevant ones (GCRK_.)
IP: Remote Host IP making the request
Domain: Virtual Host target (HTTP/1.1 Host: header). Important for Virtual Hosting servers
TYPE: HTTP verb
URL: requested URL being served.
Putting this in a script that runs when triggered by high load average can be quite revealing. Can also capture "forgotten" scripts being exploited such as "formmail.pl", etc.
Create a file with actual date as filename
This coloured prompt will show:
username in green,
grey "@" sign,
hostname in red,
current directory in yellow,
typed commands in green.
get diskusage of files (in this case logfiles in /var/log) modified during the last n days:
$ sudo find /var/log/ -mtime -n -type f | xargs du -ch
n -> last modified n*24 hours ago
Numeric arguments can be specified as
+n for greater than n,
-n for less than n,
n for exactly n.
=> so 7*24 hours (about 7 days) is -7
$ sudo find /var/log/ -mtime -7 -type f | xargs du -ch | tail -n1
You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token.
This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use:
`awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'`
You must adapt the command line to include:
* $MFA_IDis ARN of the virtual MFA or serial number of the physical one
* TTL for the credentials
Put the positive clauses after the '-o' option.
From the cwd, recursively find all rar files, extracting each rar into the directory where it was found, rather than cwd.
A nice time saver if you've used wget or similar to mirror something, where each sub dir contains an rar archive.
Its likely this can be tuned to work with multi-part archives where all parts use ambiguous .rar extensions but I didn't test this. Perhaps unrar would handle this gracefully anyway?
