linux sed简单使用
sed 帮助信息:
-bash-4.1$ sed --help
Usage: sed [OPTION]... {script-only-if-no-other-script} [input-file]...
-n, --quiet, --silent
suppress automatic printing of pattern space
-e script, --expression=script
add the script to the commands to be executed
-f script-file, --file=script-file
add the contents of script-file to the commands to be executed
--follow-symlinks
follow symlinks when processing in place; hard links
will still be broken.
-i[SUFFIX], --in-place[=SUFFIX]
edit files in place (makes backup if extension supplied).
The default operation mode is to break symbolic and hard links.
This can be changed with --follow-symlinks and --copy.
-c, --copy
use copy instead of rename when shuffling files in -i mode.
While this will avoid breaking links (symbolic or hard), the
resulting editing operation is not atomic. This is rarely
the desired mode; --follow-symlinks is usually enough, and
it is both faster and more secure.
-l N, --line-length=N
specify the desired line-wrap length for the `l' command
--posix
disable all GNU extensions.
-r, --regexp-extended
use extended regular expressions in the script.
-s, --separate
consider files as separate rather than as a single continuous
long stream.
-u, --unbuffered
load minimal amounts of data from the input files and flush
the output buffers more often
--help display this help and exit
--version output version information and exit
If no -e, --expression, -f, or --file option is given, then the first
non-option argument is taken as the sed script to interpret. All
remaining arguments are names of input files; if no input files are
specified, then the standard input is read.
GNU sed home page: <http://www.gnu.org/software/sed/>.
General help using GNU software: <http://www.gnu.org/gethelp/>.
E-mail bug reports to: <[email protected]>.
Be sure to include the word ``sed'' somewhere in the ``Subject:'' field.
替换文件内容:
源文件内容:
supplier.size=100 pic.size=100 httpconnect.timeout=20000 httpclient.maxConnections=20 retryTimes=1 job.initial-delay=0 job.fixed-delay=60000
替换后输出:
-bash-4.1$ sed 's/supplier.size=100/supplier.size=200/g' task.properties supplier.size=200 pic.size=100 httpconnect.timeout=20000 httpclient.maxConnections=20 retryTimes=1 job.initial-delay=0 job.fixed-delay=60000
这时sed并没有实际修改源文件内容，只是动态的修改了内容中源文件内容并打印出来，如何想修改源文件内容并保存需要使用 -i 参数:
sed -i 's/supplier.size=100/supplier.size=200/g' task.properties
修改指定行的内容:
-bash-4.1$ sed '7,8s/job/JOB/g' task.properties supplier.size=100 pic.size=100 httpconnect.timeout=20000 httpclient.maxConnections=20 retryTimes=1 JOB.initial-delay=0 JOB.fixed-delay=60000
-bash-4.1$ sed -e 's/supplier.size=100/supplier.size=200/g' -e 's/pic.size=100/pic.size=200/g' task.properties supplier.size=200 pic.size=200 httpconnect.timeout=20000 httpclient.maxConnections=20 retryTimes=1 job.initial-delay=0 job.fixed-delay=60000
删除行:
删除1-2行:
-bash-4.1$ sed '1,2d' task.properties httpconnect.timeout=20000 httpclient.maxConnections=20 retryTimes=1 job.initial-delay=0 job.fixed-delay=60000
-bash-4.1$ sed '2d' task.properties supplier.size=100 httpconnect.timeout=20000 httpclient.maxConnections=20 retryTimes=1 job.initial-delay=0 job.fixed-delay=60000
显示指定行:
-bash-4.1$ sed -n '1,2p' task.properties supplier.size=100 pic.size=100
-bash-4.1$ sed '/supplier.size/,/retryTimes/s/pic.size=100/pic.size=200/g' task.properties supplier.size=100 pic.size=200 httpconnect.timeout=20000 httpclient.maxConnections=20 retryTimes=1
更多介绍请参考:http://www.cnblogs.com/ggjucheng/archive/2013/01/13/2856901.html