Commands by ruedu

Commands by ruedu (4)

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Let's say you have a web site

So you have a web site and you've plastered your significant other's name all over it. But you broke up with them and have some new love in your life. How do you find all those instances of their name and replace them?
This is sample output - yours may be different.
-1

for I in `find . -name "*.php"`; do sed -i "s/old name/new name/g" $I; done

ruedu · 2009-02-16 17:09:09 734
Push your present working directory to a stack that you can pop later

If are a Bash user and you are in a directory and need to go else where for a while but don't want to lose where you were, use pushd instead of cd. cd /home/complicated/path/.I/dont/want/to/forget pushd /tmp cd thing/in/tmp popd (returns you to /home/complicated/path/.I/dont/want/to/forget)
This is sample output - yours may be different.
106

pushd /tmp

ruedu · 2009-02-16 16:52:59 784
Backup all MySQL Databases to individual files

Backups all MySQL databases to individual files. Can be put into a script that grabs current date so you have per day backups.
This is sample output - yours may be different.
9

for I in `echo "show databases;" | mysql | grep -v Database`; do mysqldump $I > "$I.sql"; done

ruedu · 2009-02-16 16:41:05 772
Get your default route

This gets you your default route programatically, useful for scripts
This is sample output - yours may be different.
1

ip route | grep default | awk '{print $3}'

ruedu · 2009-02-16 16:29:03 755

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Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

Launch firefox on a remote linux server

Actually 'firefox' is a script that then launches the 'firefox-bin' executable. You need to specify the 'no-remote' option in order to launch remote firefox instead of your local one (this drove me crazy time ago)

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Remove everything except that file

Remove everything except that file with shell tricks inside a subshell to avoid changes in the environment. $ help shopt

ignore hidden directory in bash completion (e.g. .svn)

move contents of the current directory to the parent directory, then remove current directory.

I think this is less resource consuming than the previous examples

Use color grep by default

Alias the grep command to show colored results by default.

Graphically show percent of mount space used

Automatically drops mount points that have non-numeric sizes (e.g. /proc). Tested in bash on Linux and AIX.

deaggregate ip ranges

Taking file with ip ranges, each on it's own line like: $cat ipranges.txt 213.87.86.160-213.87.86.193 213.87.87.0-213.87.88.255 91.135.210.0-91.135.210.255 command returns deaggregated ip ranges using ipcalc deaggregate feature like that: 213.87.86.160/27 213.87.86.192/31 213.87.87.0/24 213.87.88.0/24 91.135.210.0/24 Useful for configuring nginx geo module

Show every subdirectory (zsh)

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