Need to know the dynamic IP ranges used by AWS in a specific region? AWS publishes this as a JSON file.
curl -s https://ip-ranges.amazonaws.com/ip-ra[......]
Tag: Bash
Bash is the shell, or command language interpreter, for the GNU operating system.
How to soft reset Linux disks
Sometimes disks stop responding and cause system slowness because the kernel is waiting for a response that never comes. The disk appears 100% utilise[……]
Find sdx device/ATAx mappings
When dealing with hardware, you often see log messages like:
ata9: hard resetting link
ata9: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
To map[……]
Convert Squid/timestamps to a human readable format
Somebody had the brilliant idea of using Unix timestamps in Squid log files. It makes parsing easy but reading them is not so human-friendly.
This is[……]
bash – remove first line with tail and last line with head
Say you have a file called test.txt:
line 1
line 2
line 3
Remove the first line:
tail -n +2 test.txt
Remove the last line:
head -n -1 test.txt
R[……]
sed – match and replace BIND/DNS serial number programmatically
I had to make modifications to several BIND zone files. Sed proved itself invaluable once again.
The zone files looked like this:
domain.com. IN SOA[......]
Converting spreadsheets to text files with ssconvert
ssconvert is a utility shipped with Gnumeric, a command-line spreadsheet converter. It is useful when you have data in a spreadsheet and want to parse[……]
How to update all docker base images with one command
To pull the latest version of all your Docker images at once:
for docker in $(docker images | awk '{print $1,$2}' | sed 's/ /:/g' | grep -v REPOSITOR[......]
How to update all pip python packages with one command
To update all your pip-installed Python packages at once:
sudo pip install -U `pip list -o | cut -d ' ' -f1 | tr '\n' ' '`
This lists outdated packa[……]
Test email from command line
This post is over 3 years old, so please keep in mind that some of its content might not be relevant anymore.
When you set up email forwarding or conf[……]