userful for direct copy & paste command for doumenation or next using Show Sample Output
# convert tool is from deb imagemagick-6.q16 apt install imagemagick-6.q16 Show Sample Output
tracing redirects for a given url shortener Show Sample Output
move filename/rename filenames with Uppercase to lowercase in current directory Show Sample Output
get the SHA256 sum signatur for a file Show Sample Output
if you want to move with command mv large list of files than you would get following error /bin/mv: Argument list too long alternavite with exec: find /source/directory -mindepth 1 -maxdepth 1 -name '*' -exec mv {} /target/directory \; Show Sample Output
sometimes I need list from path with max limit for recursive depth directory listing
while dumping database if you see following error/warning than you have to repair broken tables/rows Show Sample Output
generating self signed ssl certificate to use in dovecot postfix nginx Self signed certificates can be used for private encryptions between server and client and must be manually accepted on browser/ client Show Sample Output
scan whole specific network for active online ips Show Sample Output
iterating range of numer with for loop in shell or bash Show Sample Output
to test check if given variable is a digit / number Show Sample Output
XX is your device partition number like /dev/sdc1 .
to see how many inodes your partition have type:
df --inodes (or df -i)
Default formatting with ext4 would create small inode count for the new partition
if you need big count of inodes is the fstype news the correct one.
in debian you can see which fstype exists as template in:
vim /etc/mke2fs.conf
if you format default ext for a partition size with 1TB you would get 1 Million inodes (not enough for backupStorages)
but if you format with fstype news you would get hunderd of millions of inodes for the partition.
you have tune
/etc/sysctl.conf
also with following sysconfig parameters
fs.file-max = XXX
fs.nr_open = XXX
where XXX is the count of max inodes for whole system
in this examp start htop command in tmux session over the shell cosole and set title for the tmux without doing it manuelly in tmux
removing ^M characters from file with sed
change user password one liner
check web server port 80 response header Show Sample Output
shell generate random strong password Show Sample Output
website recursive offline mirror with wget
need package: pv apt-get install pv get the iso size in byte with ls -l install-cd.iso /dev/sdb is your USB Device (without partitionNr.)
add route default gateway on shell
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