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Using xargs is better than:
find /path/to/dir -type f -exec rm \-f {} \;as the -exec switch uses a separate process for each remove. xargs splits the streamed files into more managable subsets so less processes are required.12find /path/to/dir -type f -print0 | xargs -0 rm -
This greps all PHP files for a given classname and displays both the file and the usage. Show Sample Output
1find . -name "*.php" -exec grep \-H "new filter_" {} \; -
Useful when you forget to use sudo for a command. "!!" grabs the last run command.
1218sudo !! -
Creates a command alias ('cr' in the above example) that searches the contents of files matching a set of file extensions (C & C++ source-code in the above example) recursively within the current directory. Search configured to be in colour, ignore-case, show line numbers and show 4 lines of context. Put in shell initialisation file of your choice. Trivially easy to use, e.g:
cr sha1_initShow Sample Output0alias cr='find . 2>/dev/null -regex '\''.*\.\(c\|cpp\|pc\|h\|hpp\|cc\)$'\'' | xargs grep --color=always -ni -C2' -
Recursively searches current directory and outputs sorted list of each directory's disk usage to a text file. Show Sample Output
6du | sort -gr > file_sizes -
This can be useful when a large remove operation is taking place.
6watch "df | grep /path/to/drive" -
This is an alternative to cron which allows a one-off task to be scheduled for a certain time.
266echo "ls -l" | at midnight -
This uses awk to grab the IP address from each request and then sorts and summarises the top 10.
22tail -10000 access_log | awk '{print $1}' | sort | uniq -c | sort -n | tail -
3find . \( -name "*.php" -o -name "*.js" \) -exec svn propset svn:keywords Id {} \;
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18find . -type f | wc -l
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ps returns all running processes which are then sorted by the 4th field in numerical order and the top 10 are sent to STDOUT. Show Sample Output
106ps aux | sort -nk +4 | tail -
See http://dev.mysql.com/doc/refman/5.0/en/myisamchk.html for further details. You can also repair all tables by running:
myisamchk -r *.MYI-2myisamchk /path/to/mysql/files/*.MYI - ‹ First < 566 567 568
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